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Added a new command dispatcher that injects different parameters dynamically.

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This reduces the boilerplate code needed to parse arguments in each command, and reduces the need to maintain command documentation with @Command.

Example:

@Command(aliases = "/set", desc = "Set all the blocks inside the selection to a block")
@CommandPermissions("worldedit.region.set")
@Logging(REGION)
void setBlocks(LocalPlayer player, EditSession editSession, @Selection Region region, Pattern replaceWith) {
    // Perform command
}
This commit is contained in:
Albert Pham 2013-06-18 14:50:46 -07:00
parent 80536d85ca
commit 04c31262f7
46 changed files with 4350 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
pom.xml
View File

@ -76,6 +76,13 @@
<url>http://repo.bukkit.org/content/groups/public</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>sk89q-repo</id>
<url>http://maven.sk89q.com/repo/</url>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency> <!-- Used for snapshots -->
@ -112,6 +119,12 @@
<type>jar</type>
<optional>true</optional> <!-- Don't export -->
</dependency>
<dependency> <!-- Method names for the command framework -->
<groupId>com.thoughtworks.paranamer</groupId>
<artifactId>paranamer</artifactId>
<version>2.5.2</version>
</dependency>
<dependency> <!-- Bukkit implementation -->
<groupId>org.bukkit</groupId>
@ -191,6 +204,25 @@
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>com.thoughtworks.paranamer</groupId>
<artifactId>paranamer-maven-plugin-largestack</artifactId>
<version>2.5.5-SNAPSHOT</version>
<executions>
<execution>
<id>run</id>
<phase>compile</phase>
<configuration>
<sourceDirectory>${project.build.sourceDirectory}</sourceDirectory>
<outputDirectory>${project.build.outputDirectory}</outputDirectory>
</configuration>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
@ -244,6 +276,7 @@
<artifactSet>
<includes>
<include>com.sk89q:jchronic</include>
<include>com.thoughtworks.paranamer:paranamer</include>
</includes>
</artifactSet>
</configuration>
@ -302,8 +335,40 @@
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!-- This plugin's configuration is used to store Eclipse m2e settings only.
It has no influence on the Maven build itself. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>com.thoughtworks.paranamer</groupId>
<artifactId>paranamer-maven-plugin-largestack</artifactId>
<versionRange>[2.5.5-SNAPSHOT,)</versionRange>
<goals>
<goal>generate</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore></ignore>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<profiles>
<!-- Attach javadocs and source .jars -->
<profile>

78
src/main/java/com/sk89q/minecraft/util/commands/CommandContext.java
View File

@ -27,15 +27,22 @@ import java.util.Map;
import java.util.Set;
public class CommandContext {
protected final String command;
protected final List<String> parsedArgs;
protected final List<Integer> originalArgIndices;
protected final String[] originalArgs;
protected final Set<Character> booleanFlags = new HashSet<Character>();
protected final Map<Character, String> valueFlags = new HashMap<Character, String>();
protected final SuggestionContext suggestionContext;
protected final CommandLocals locals;
public static String[] split(String args) {
return args.split(" ", -1);
}
public CommandContext(String args) throws CommandException {
this(args.split(" "), null);
this(args.split(" ", -1), null);
}
public CommandContext(String[] args) throws CommandException {
@ -43,28 +50,50 @@ public class CommandContext {
}
public CommandContext(String args, Set<Character> valueFlags) throws CommandException {
this(args.split(" "), valueFlags);
this(args.split(" ", -1), valueFlags);
}
public CommandContext(String args, Set<Character> valueFlags, boolean allowHangingFlag)
throws CommandException {
this(args.split(" ", -1), valueFlags, allowHangingFlag, new CommandLocals());
}
public CommandContext(String[] args, Set<Character> valueFlags) throws CommandException {
this(args, valueFlags, false, null);
}
/**
* @param args An array with arguments. Empty strings outside quotes will be removed.
* @param valueFlags A set containing all value flags. Pass null to disable value flag parsing.
* @throws CommandException This is thrown if flag fails for some reason.
* Parse the given array of arguments.
*
* <p>Empty arguments are removed from the list of arguments.</p>
*
* @param args an array with arguments
* @param valueFlags a set containing all value flags (pass null to disable value flag parsing)
* @param allowHangingFlag true if hanging flags are allowed
* @param locals the locals, null to create empty one
* @throws CommandException thrown on a parsing error
*/
public CommandContext(String[] args, Set<Character> valueFlags) throws CommandException {
public CommandContext(String[] args, Set<Character> valueFlags,
boolean allowHangingFlag, CommandLocals locals) throws CommandException {
if (valueFlags == null) {
valueFlags = Collections.emptySet();
}
originalArgs = args;
command = args[0];
this.locals = locals != null ? locals : new CommandLocals();
boolean isHanging = false;
SuggestionContext suggestionContext = SuggestionContext.hangingValue();
// Eliminate empty args and combine multiword args first
List<Integer> argIndexList = new ArrayList<Integer>(args.length);
List<String> argList = new ArrayList<String>(args.length);
for (int i = 1; i < args.length; ++i) {
isHanging = false;
String arg = args[i];
if (arg.length() == 0) {
isHanging = true;
continue;
}
@ -112,9 +141,14 @@ public class CommandContext {
for (int nextArg = 0; nextArg < argList.size(); ) {
// Fetch argument
String arg = argList.get(nextArg++);
suggestionContext = SuggestionContext.hangingValue();
// Not a flag?
if (arg.charAt(0) != '-' || arg.length() == 1 || !arg.matches("^-[a-zA-Z]+$")) {
if (!isHanging) {
suggestionContext = SuggestionContext.lastValue();
}
originalArgIndices.add(argIndexList.get(nextArg - 1));
parsedArgs.add(arg);
continue;
@ -139,16 +173,30 @@ public class CommandContext {
}
if (nextArg >= argList.size()) {
throw new CommandException("No value specified for the '-" + flagName + "' flag.");
if (allowHangingFlag) {
suggestionContext = SuggestionContext.flag(flagName);
break;
} else {
throw new CommandException("No value specified for the '-" + flagName + "' flag.");
}
}
// If it is a value flag, read another argument and add it
this.valueFlags.put(flagName, argList.get(nextArg++));
if (!isHanging) {
suggestionContext = SuggestionContext.flag(flagName);
}
} else {
booleanFlags.add(flagName);
}
}
}
this.suggestionContext = suggestionContext;
}
public SuggestionContext getSuggestionContext() {
return suggestionContext;
}
public String getCommand() {
@ -175,6 +223,18 @@ public class CommandContext {
}
return buffer.toString();
}
public String getRemainingString(int start) {
return getString(start, parsedArgs.size() - 1);
}
public String getString(int start, int end) {
StringBuilder buffer = new StringBuilder(parsedArgs.get(start));
for (int i = start + 1; i < end + 1; ++i) {
buffer.append(" ").append(parsedArgs.get(i));
}
return buffer.toString();
}
public int getInteger(int index) throws NumberFormatException {
return Integer.parseInt(parsedArgs.get(index));
@ -258,4 +318,8 @@ public class CommandContext {
public int argsLength() {
return parsedArgs.size();
}
public CommandLocals getLocals() {
return locals;
}
}

35
src/main/java/com/sk89q/minecraft/util/commands/CommandException.java
View File

@ -19,8 +19,14 @@
package com.sk89q.minecraft.util.commands;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
public class CommandException extends Exception {
private static final long serialVersionUID = 870638193072101739L;
private List<String> commandStack = new ArrayList<String>();
public CommandException() {
super();
@ -30,8 +36,37 @@ public class CommandException extends Exception {
super(message);
}
public CommandException(String message, Throwable t) {
super(message, t);
}
public CommandException(Throwable t) {
super(t);
}
public void prependStack(String name) {
commandStack.add(name);
}
public String toStackString(String prefix, String spacedSuffix) {
StringBuilder builder = new StringBuilder();
if (prefix != null) {
builder.append(prefix);
}
ListIterator<String> li = commandStack.listIterator(commandStack.size());
while (li.hasPrevious()) {
if (li.previousIndex() != commandStack.size() - 1) {
builder.append(" ");
}
builder.append(li.previous());
}
if (spacedSuffix != null) {
if (builder.length() > 0) {
builder.append(" ");
}
builder.append(spacedSuffix);
}
return builder.toString();
}
}

49
src/main/java/com/sk89q/minecraft/util/commands/CommandLocals.java Normal file
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@ -0,0 +1,49 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.minecraft.util.commands;
import java.util.HashMap;
import java.util.Map;
public class CommandLocals {
private final Map<Object, Object> locals = new HashMap<Object, Object>();
public boolean containsKey(Object key) {
return locals.containsKey(key);
}
public boolean containsValue(Object value) {
return locals.containsValue(value);
}
public Object get(Object key) {
return locals.get(key);
}
@SuppressWarnings("unchecked")
public <T> T get(Class<T> key) {
return (T) locals.get(key);
}
public Object put(Object key, Object value) {
return locals.put(key, value);
}
}

49
src/main/java/com/sk89q/minecraft/util/commands/SuggestionContext.java Normal file
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@ -0,0 +1,49 @@
package com.sk89q.minecraft.util.commands;
public class SuggestionContext {
private static final SuggestionContext FOR_LAST = new SuggestionContext(null, true);
private static final SuggestionContext FOR_HANGING = new SuggestionContext(null, false);
private final Character flag;
private final boolean forLast;
private SuggestionContext(Character flag, boolean forLast) {
this.flag = flag;
this.forLast = forLast;
}
public boolean forHangingValue() {
return flag == null && !forLast;
}
public boolean forLastValue() {
return flag == null && forLast;
}
public boolean forFlag() {
return flag != null;
}
public Character getFlag() {
return flag;
}
@Override
public String toString() {
return forFlag() ? ("-" + getFlag()) : (forHangingValue() ? "hanging" : "last");
}
public static SuggestionContext flag(Character flag) {
return new SuggestionContext(flag, false);
}
public static SuggestionContext lastValue() {
return FOR_LAST;
}
public static SuggestionContext hangingValue() {
return FOR_HANGING;
}
}

63
src/main/java/com/sk89q/rebar/command/CommandCallable.java Normal file
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@ -0,0 +1,63 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.Collection;
import java.util.Set;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
/**
* A command that can be executed.
*/
public interface CommandCallable {
/**
* Get a list of value flags used by this command.
*
* @return a list of value flags
*/
Set<Character> getValueFlags();
/**
* Execute the command.
*
* @param context the user input
* @throws CommandException thrown on any sort of command exception
*/
void call(CommandContext context) throws CommandException;
/**
* Get a list of suggestions.
*
* @param context the user input
* @return a list of suggestions
* @throws CommandException
*/
Collection<String> getSuggestions(CommandContext context) throws CommandException;
/**
* Get an object describing this command.
*
* @return the command description
*/
Description getDescription();
}

78
src/main/java/com/sk89q/rebar/command/CommandMapping.java Normal file
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@ -0,0 +1,78 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
/**
* Tracks a command registration.
*/
public class CommandMapping {
private final String[] aliases;
private final CommandCallable callable;
/**
* Create a new instance.
*
* @param callable the command callable
* @param alias a list of all aliases, where the first one is the primary one
*/
public CommandMapping(CommandCallable callable, String... alias) {
super();
this.aliases = alias;
this.callable = callable;
}
/**
* Get the primary alias.
*
* @return the primary alias
*/
public String getPrimaryAlias() {
return aliases[0];
}
/**
* Get a list of all aliases.
*
* @return aliases
*/
public String[] getAllAliases() {
return aliases;
}
/**
* Get the callable
*
* @return the callable
*/
public CommandCallable getCallable() {
return callable;
}
/**
* Get the {@link Description} form the callable.
*
* @return the description
*/
public Description getDescription() {
return getCallable().getDescription();
}
}

69
src/main/java/com/sk89q/rebar/command/Description.java Normal file
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@ -0,0 +1,69 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.List;
/**
* A description of a command.
*/
public interface Description {
/**
* Get the list of parameters for this command.
*
* @return a list of parameters
*/
List<Parameter> getParameters();
/**
* Get a short one-line description of this command.
*
* @return a description, or null if no description is available
*/
String getDescription();
/**
* Get a longer help text about this command.
*
* @return a help text, or null if no help is available
*/
String getHelp();
/**
* Get the usage string of this command.
*
* <p>A usage string may look like
* <code>[-w &lt;world&gt;] &lt;var1&gt; &lt;var2&gt;</code>.</p>
*
* @return a usage string
*/
String getUsage();
/**
* Get a list of permissions that the player may have to have permission.
*
* <p>Permission data may or may not be available. This is only useful as a
* potential hint.</p>
*
* @return the list of permissions
*/
List<String> getPermissions();
}

112
src/main/java/com/sk89q/rebar/command/Dispatcher.java Normal file
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@ -0,0 +1,112 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.Collection;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.CommandLocals;
/**
* Executes a command based on user input.
*/
public interface Dispatcher {
/**
* Register a command with this dispatcher.
*
* @param callable the command executor
* @param alias a list of aliases, where the first alias is the primary name
*/
void register(CommandCallable callable, String... alias);
/**
* Get a list of command registrations.
*
* <p>The returned collection cannot be modified.</p>
*
* @return a list of registrations
*/
Collection<CommandMapping> getCommands();
/**
* Get a list of primary aliases.
*
* <p>The returned collection cannot be modified.</p>
*
* @return a list of aliases
*/
Collection<String> getPrimaryAliases();
/**
* Get a list of all the command aliases.
*
* <p>A command may have more than one alias assigned to it. The returned
* collection cannot be modified.</p>
*
* @return a list of aliases
*/
Collection<String> getAllAliases();
/**
* Get the {@link CommandCallable} associated with an alias.
*
* @param alias the alias
* @return the command mapping
*/
CommandMapping get(String alias);
/**
* Returns whether the dispatcher contains a registered command for the given alias.
*
* @param alias the alias
* @return true if a registered command exists
*/
boolean contains(String alias);
/**
* Execute the correct command based on the input.
*
* @param arguments the arguments
* @param locals the locals
* @return the called command, or null if there was no command found
* @throws CommandException thrown on a command error
*/
CommandMapping call(String arguments, CommandLocals locals) throws CommandException;
/**
* Execute the correct command based on the input.
*
* @param arguments the arguments
* @param locals the locals
* @return the called command, or null if there was no command found
* @throws CommandException thrown on a command error
*/
CommandMapping call(String[] arguments, CommandLocals locals) throws CommandException;
/**
* Get a list of suggestions based on input.
*
* @param arguments the arguments entered up to this point
* @return a list of suggestions
* @throws CommandException thrown if there was a parsing error
*/
Collection<String> getSuggestions(String arguments) throws CommandException;
}

48
src/main/java/com/sk89q/rebar/command/InvalidUsageException.java Normal file
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@ -0,0 +1,48 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import com.sk89q.minecraft.util.commands.CommandException;
/**
* Thrown when a command is not used properly.
*/
public class InvalidUsageException extends CommandException {
private static final long serialVersionUID = -3222004168669490390L;
private final Description description;
public InvalidUsageException(Description description) {
this.description = description;
}
public InvalidUsageException(String message, Description description) {
super(message);
this.description = description;
}
public Description getDescription() {
return description;
}
public String getUsage(String prefix) {
return toStackString(prefix, getDescription().getUsage());
}
}

30
src/main/java/com/sk89q/rebar/command/MissingParameterException.java Normal file
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@ -0,0 +1,30 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import com.sk89q.rebar.command.parametric.ParameterException;
/**
* Thrown when there is a missing parameter.
*/
public class MissingParameterException extends ParameterException {
private static final long serialVersionUID = 2169299987926950535L;
}

65
src/main/java/com/sk89q/rebar/command/Parameter.java Normal file
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@ -0,0 +1,65 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
/**
* Describes a parameter.
*
* @see Description
*/
public interface Parameter {
/**
* The name of the parameter.
*
* @return the name
*/
String getName();
/**
* Get the flag associated with this parameter.
*
* @return the flag, or null if there is no flag associated
* @see #isValueFlag()
*/
Character getFlag();
/**
* Return whether the flag is a value flag.
*
* @return true if the flag is a value flag
* @see #getFlag()
*/
boolean isValueFlag();
/**
* Get whether this parameter is optional.
*
* @return true if the parameter does not have to be specified
*/
boolean isOptional();
/**
* Get the default value as a string to be parsed by the binding.
*
* @return a default value, or null if none is set
*/
public String[] getDefaultValue();
}

128
src/main/java/com/sk89q/rebar/command/SimpleDescription.java Normal file
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@ -0,0 +1,128 @@
// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.Collections;
import java.util.List;
/**
* A simple implementation of {@link Description} which has setters.
*/
public class SimpleDescription implements Description {
private List<Parameter> parameters = Collections.emptyList();
private List<String> permissions = Collections.emptyList();
private String description;
private String help;
private String overrideUsage;
@Override
public List<Parameter> getParameters() {
return parameters;
}
/**
* Set the list of parameters.
*
* @param parameters the list of parameters
* @see #getParameters()
*/
public void setParameters(List<Parameter> parameters) {
this.parameters = Collections.unmodifiableList(parameters);
}
@Override
public String getDescription() {
return description;
}
/**
* Set the description of the command.
*
* @param description the description
* @see #getDescription()
*/
public void setDescription(String description) {
this.description = description;
}
@Override
public String getHelp() {
return help;
}
/**
* Set the help text of the command.
*
* @param help the help text
* @see #getHelp()
*/
public void setHelp(String help) {
this.help = help;
}
@Override
public List<String> getPermissions() {
return permissions;
}
/**
* Set the permissions of this command.
*
* @param permissions the permissions
*/
public void setPermissions(List<String> permissions) {
this.permissions = Collections.unmodifiableList(permissions);
}
/**
* Override the usage string returned with a given one.
*
* @param usage usage string, or null
*/
public void overrideUsage(String usage) {
this.overrideUsage = usage;
}
@Override
public String getUsage() {
if (overrideUsage != null) {
return overrideUsage;
}
StringBuilder builder = new StringBuilder();
boolean first = true;
for (Parameter parameter : parameters) {
if (!first) {
builder.append(" ");
}
builder.append(parameter.toString());
first = false;
}
return builder.toString();
}
@Override
public String toString() {
return getUsage();
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.CommandLocals;
import com.sk89q.minecraft.util.commands.WrappedCommandException;
/**
* A simple implementation of {@link Dispatcher}.
*/
public class SimpleDispatcher implements Dispatcher {
private final Map<String, CommandMapping> commands = new HashMap<String, CommandMapping>();
@Override
public void register(CommandCallable callable, String... alias) {
CommandMapping mapping = new CommandMapping(callable, alias);
// Check for replacements
for (String a : alias) {
String lower = a.toLowerCase();
if (commands.containsKey(lower)) {
throw new IllegalArgumentException(
"Replacing commands is currently undefined behavior");
}
}
for (String a : alias) {
String lower = a.toLowerCase();
commands.put(lower, mapping);
}
}
@Override
public Collection<CommandMapping> getCommands() {
return Collections.unmodifiableCollection(commands.values());
}
@Override
public Set<String> getAllAliases() {
return Collections.unmodifiableSet(commands.keySet());
}
@Override
public Set<String> getPrimaryAliases() {
Set<String> aliases = new HashSet<String>();
for (CommandMapping mapping : getCommands()) {
aliases.add(mapping.getPrimaryAlias());
}
return Collections.unmodifiableSet(aliases);
}
@Override
public boolean contains(String alias) {
return commands.containsKey(alias.toLowerCase());
}
@Override
public CommandMapping get(String alias) {
return commands.get(alias.toLowerCase());
}
@Override
public CommandMapping call(String arguments, CommandLocals locals) throws CommandException {
return call(CommandContext.split(arguments), locals);
}
@Override
public CommandMapping call(String[] arguments, CommandLocals locals) throws CommandException {
CommandContext dummyContext = new CommandContext(arguments);
CommandMapping mapping = get(dummyContext.getCommand());
if (mapping != null) {
CommandCallable c = mapping.getCallable();
CommandContext context =
new CommandContext(arguments, c.getValueFlags(), false, locals);
try {
c.call(context);
} catch (CommandException e) {
e.prependStack(context.getCommand());
throw e;
} catch (Throwable t) {
throw new WrappedCommandException(t);
}
}
return mapping;
}
@Override
public Collection<String> getSuggestions(String arguments) throws CommandException {
CommandContext dummyContext = new CommandContext(arguments);
CommandMapping mapping = get(dummyContext.getCommand());
if (mapping != null) {
CommandCallable c = mapping.getCallable();
CommandContext context =
new CommandContext(arguments, c.getValueFlags(), true);
return c.getSuggestions(context);
}
return new ArrayList<String>();
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
/**
* A combination {@link Dispatcher} and {@link CommandCallable} that is backed by
* a {@link SimpleDispatcher}.
*
* <p>The primary use of this is to make nested commands.</p>
*/
public class SimpleDispatcherCommand extends SimpleDispatcher implements CommandCallable {
private final SimpleDescription description = new SimpleDescription();
@Override
public Set<Character> getValueFlags() {
return Collections.emptySet();
}
@Override
public void call(CommandContext context) throws CommandException {
if (context.argsLength() >= 1) {
super.call(context.getRemainingString(0), context.getLocals());
} else {
Set<String> aliases = getPrimaryAliases();
if (aliases.size() == 0) {
throw new InvalidUsageException(
"This command is supposed to have sub-commands, " +
"but it has no sub-commands.",
getDescription());
}
StringBuilder builder = new StringBuilder();
for (String alias : getPrimaryAliases()) {
builder.append("\n- ").append(alias);
}
if (aliases.size() == 1) {
builder.append(" (there is only one)");
}
throw new InvalidUsageException(
"Select one of these subcommand(s):" + builder.toString(),
getDescription());
}
}
@Override
public SimpleDescription getDescription() {
return description;
}
@Override
public Collection<String> getSuggestions(CommandContext context) throws CommandException {
if (context.argsLength() == 0) {
return super.getAllAliases();
} else if (context.argsLength() == 1 &&
context.getSuggestionContext().forLastValue()) {
String prefix = context.getString(0).toLowerCase();
List<String> suggestions = new ArrayList<String>();
for (String alias : super.getAllAliases()) {
if (alias.startsWith(prefix)) {
suggestions.add(alias);
}
}
return suggestions;
}
return super.getSuggestions(
context.argsLength() > 1 ? context.getRemainingString(1) : "");
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
/**
* A simple implementation of {@link Parameter} that has setters.
*/
public class SimpleParameter implements Parameter {
private String name;
private Character flag;
private boolean isValue;
private boolean isOptional;
private String[] defaultValue;
/**
* Create a new parameter with no name defined yet.
*/
public SimpleParameter() {
}
/**
* Create a new parameter of the given name.
*
* @param name the name
*/
public SimpleParameter(String name) {
this.name = name;
}
@Override
public String getName() {
return name;
}
/**
* Set the name of the parameter.
*
* @param name the parameter name
*/
public void setName(String name) {
this.name = name;
}
@Override
public Character getFlag() {
return flag;
}
@Override
public boolean isValueFlag() {
return flag != null && isValue;
}
/**
* Set the flag used by this parameter.
*
* @param flag the flag, or null if there is no flag
* @param isValue true if the flag is a value flag
*/
public void setFlag(Character flag, boolean isValue) {
this.flag = flag;
this.isValue = isValue;
}
@Override
public boolean isOptional() {
return isOptional || getFlag() != null;
}
/**
* Set whether this parameter is optional.
*
* @param isOptional true if this parameter is optional
*/
public void setOptional(boolean isOptional) {
this.isOptional = isOptional;
}
@Override
public String[] getDefaultValue() {
return defaultValue;
}
/**
* Set the default value.
*
* @param defaultValue a default value, or null if none
*/
public void setDefaultValue(String[] defaultValue) {
this.defaultValue = defaultValue;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
if (getFlag() != null) {
if (isValueFlag()) {
builder.append("[-")
.append(getFlag()).append(" <").append(getName()).append(">]");
} else {
builder.append("[-").append(getFlag()).append("]");
}
} else {
if (isOptional()) {
builder.append("[<").append(getName()).append(">]");
} else {
builder.append("<").append(getName()).append(">");
}
}
return builder.toString();
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command;
import com.sk89q.rebar.command.parametric.ParameterException;
/**
* Thrown when there are leftover parameters that were not consumed, particular in the
* case of the user providing too many parameters.
*/
public class UnconsumedParameterException extends ParameterException {
private static final long serialVersionUID = 4449104854894946023L;
private String unconsumed;
public UnconsumedParameterException(String unconsumed) {
this.unconsumed = unconsumed;
}
public String getUnconsumed() {
return unconsumed;
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import java.lang.annotation.Annotation;
import com.sk89q.rebar.command.parametric.BindingBehavior;
import com.sk89q.rebar.command.parametric.BindingHelper;
import com.sk89q.rebar.command.parametric.BindingMatch;
import com.sk89q.rebar.command.parametric.ParameterException;
import com.sk89q.rebar.command.parametric.ArgumentStack;
/**
* Handles basic Java types such as {@link String}s, {@link Byte}s, etc.
*
* <p>Handles both the object and primitive types.</p>
*/
public final class PrimitiveBindings extends BindingHelper {
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param text the text annotation
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(classifier = Text.class,
type = String.class,
behavior = BindingBehavior.CONSUMES,
consumedCount = -1,
provideModifiers = true)
public String getText(ArgumentStack context, Text text, Annotation[] modifiers)
throws ParameterException {
String v = context.remaining();
validate(v, modifiers);
return v;
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = String.class,
behavior = BindingBehavior.CONSUMES,
consumedCount = 1,
provideModifiers = true)
public String getString(ArgumentStack context, Annotation[] modifiers)
throws ParameterException {
String v = context.next();
validate(v, modifiers);
return v;
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = { Boolean.class, boolean.class },
behavior = BindingBehavior.CONSUMES,
consumedCount = 1)
public Boolean getBoolean(ArgumentStack context) throws ParameterException {
return context.nextBoolean();
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = { Integer.class, int.class },
behavior = BindingBehavior.CONSUMES,
consumedCount = 1,
provideModifiers = true)
public Integer getInteger(ArgumentStack context, Annotation[] modifiers)
throws ParameterException {
Integer v = context.nextInt();
if (v != null) {
validate(v, modifiers);
}
return v;
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = { Short.class, short.class },
behavior = BindingBehavior.CONSUMES,
consumedCount = 1,
provideModifiers = true)
public Short getShort(ArgumentStack context, Annotation[] modifiers)
throws ParameterException {
Integer v = getInteger(context, modifiers);
if (v != null) {
return v.shortValue();
}
return null;
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = { Double.class, double.class },
behavior = BindingBehavior.CONSUMES,
consumedCount = 1,
provideModifiers = true)
public Double getDouble(ArgumentStack context, Annotation[] modifiers)
throws ParameterException {
Double v = context.nextDouble();
if (v != null) {
validate(v, modifiers);
}
return v;
}
/**
* Gets a type from a {@link ArgumentStack}.
*
* @param context the context
* @param modifiers a list of modifiers
* @return the requested type
* @throws ParameterException on error
*/
@BindingMatch(type = { Float.class, float.class },
behavior = BindingBehavior.CONSUMES,
consumedCount = 1,
provideModifiers = true)
public Float getFloat(ArgumentStack context, Annotation[] modifiers)
throws ParameterException {
Double v = getDouble(context, modifiers);
if (v != null) {
return v.floatValue();
}
return null;
}
/**
* Validate a number value using relevant modifiers.
*
* @param number the number
* @param modifiers the list of modifiers to scan
* @throws ParameterException on a validation error
*/
private static void validate(double number, Annotation[] modifiers)
throws ParameterException {
for (Annotation modifier : modifiers) {
if (modifier instanceof Range) {
Range range = (Range) modifier;
if (number < range.min()) {
throw new ParameterException(
String.format(
"A valid value is greater than or equal to %s " +
"(you entered %s)", range.min(), number));
} else if (number > range.max()) {
throw new ParameterException(
String.format(
"A valid value is less than or equal to %s " +
"(you entered %s)", range.max(), number));
}
}
}
}
/**
* Validate a number value using relevant modifiers.
*
* @param number the number
* @param modifiers the list of modifiers to scan
* @throws ParameterException on a validation error
*/
private static void validate(int number, Annotation[] modifiers)
throws ParameterException {
for (Annotation modifier : modifiers) {
if (modifier instanceof Range) {
Range range = (Range) modifier;
if (number < range.min()) {
throw new ParameterException(
String.format(
"A valid value is greater than or equal to %s " +
"(you entered %s)", range.min(), number));
} else if (number > range.max()) {
throw new ParameterException(
String.format(
"A valid value is less than or equal to %s " +
"(you entered %s)", range.max(), number));
}
}
}
}
/**
* Validate a string value using relevant modifiers.
*
* @param string the string
* @param modifiers the list of modifiers to scan
* @throws ParameterException on a validation error
*/
private static void validate(String string, Annotation[] modifiers)
throws ParameterException {
if (string == null) {
return;
}
for (Annotation modifier : modifiers) {
if (modifier instanceof Validate) {
Validate validate = (Validate) modifier;
if (!validate.regex().isEmpty()) {
if (!string.matches(validate.regex())) {
throw new ParameterException(
String.format(
"The given text doesn't match the right " +
"format (technically speaking, the 'format' is %s)",
validate.regex()));
}
}
}
}
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Specifies a range of values for numbers.
*
* @see PrimitiveBindings a user of this annotation as a modifier
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Range {
/**
* The minimum value that the number can be at, inclusive.
*
* @return the minimum value
*/
double min() default Double.MIN_VALUE;
/**
* The maximum value that the number can be at, inclusive.
*
* @return the maximum value
*/
double max() default Double.MAX_VALUE;
}

45
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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.rebar.command.parametric.BindingBehavior;
import com.sk89q.rebar.command.parametric.BindingHelper;
import com.sk89q.rebar.command.parametric.BindingMatch;
import com.sk89q.rebar.command.parametric.ArgumentStack;
/**
* Standard bindings that should be available to most configurations.
*/
public final class StandardBindings extends BindingHelper {
/**
* Gets a {@link CommandContext} from a {@link ArgumentStack}.
*
* @param context the context
* @return a selection
*/
@BindingMatch(type = CommandContext.class,
behavior = BindingBehavior.PROVIDES)
public CommandContext getCommandContext(ArgumentStack context) {
context.markConsumed(); // Consume entire stack
return context.getContext();
}
}

43
src/main/java/com/sk89q/rebar/command/binding/Switch.java Normal file
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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates a command flag, such as <code>/command -f</code>.
*
* <p>If used on a boolean type, then the flag will be a non-value flag. If
* used on any other type, then the flag will be a value flag.</p>
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Switch {
/**
* The flag character.
*
* @return the flag character (A-Z a-z 0-9 is acceptable)
*/
char value();
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import com.sk89q.rebar.command.parametric.ArgumentStack;
/**
* Indicates a {@link String} parameter will call {@link ArgumentStack#remaining()} and
* therefore consume all remaining arguments.
*
* <p>This should only be used at the end of a list of parameters (of parameters that
* need to consume from the stack of arguments), otherwise following parameters will
* have no values left to consume.</p>
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Text {
}

44
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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.binding;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.regex.Pattern;
/**
* Used to validate a string.
*
* @see PrimitiveBindings where this validation is used
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Validate {
/**
* An optional regular expression that must match the string.
*
* @see Pattern regular expression class
* @return the pattern
*/
String regex() default "";
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.fluent;
import com.sk89q.rebar.command.Dispatcher;
import com.sk89q.rebar.command.SimpleDispatcher;
import com.sk89q.rebar.command.parametric.ParametricBuilder;
/**
* A fluent interface to creating a command graph.
*
* <p>A command graph may have multiple commands, and multiple sub-commands below that,
* and possibly below that.</p>
*/
public class CommandGraph {
private final DispatcherNode rootDispatcher;
private ParametricBuilder builder;
/**
* Create a new command graph.
*/
public CommandGraph() {
SimpleDispatcher dispatcher = new SimpleDispatcher();
rootDispatcher = new DispatcherNode(this, null, dispatcher);
}
/**
* Get the root dispatcher node.
*
* @return the root dispatcher node
*/
public DispatcherNode commands() {
return rootDispatcher;
}
/**
* Get the {@link ParametricBuilder}.
*
* @return the builder, or null.
*/
public ParametricBuilder getBuilder() {
return builder;
}
/**
* Set the {@link ParametricBuilder} used for calls to
* {@link DispatcherNode#build(Object)}.
*
* @param builder the builder, or null
* @return this object
*/
public CommandGraph builder(ParametricBuilder builder) {
this.builder = builder;
return this;
}
/**
* Get the root dispatcher.
*
* @return the root dispatcher
*/
public Dispatcher getDispatcher() {
return rootDispatcher.getDispatcher();
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.fluent;
import com.sk89q.rebar.command.CommandCallable;
import com.sk89q.rebar.command.Dispatcher;
import com.sk89q.rebar.command.SimpleDispatcher;
import com.sk89q.rebar.command.SimpleDispatcherCommand;
import com.sk89q.rebar.command.parametric.ParametricBuilder;
/**
* A collection of commands.
*/
public class DispatcherNode {
private final CommandGraph graph;
private final DispatcherNode parent;
private final SimpleDispatcher dispatcher;
/**
* Create a new instance.
*
* @param graph the root fluent graph object
* @param parent the parent node, or null
* @param dispatcher the dispatcher for this node
*/
DispatcherNode(CommandGraph graph, DispatcherNode parent,
SimpleDispatcher dispatcher) {
this.graph = graph;
this.parent = parent;
this.dispatcher = dispatcher;
}
/**
* Set the description.
*
* <p>This can only be used on {@link DispatcherNode}s returned by
* {@link #group(String...)}.</p>
*
* @param description the description
* @return this object
*/
public DispatcherNode describe(String description) {
if (dispatcher instanceof SimpleDispatcherCommand) {
((SimpleDispatcherCommand) dispatcher).getDescription()
.setDescription(description);
}
return this;
}
/**
* Register a command with this dispatcher.
*
* @param callable the executor
* @param alias the list of aliases, where the first alias is the primary one
*/
public void register(CommandCallable callable, String... alias) {
dispatcher.register(callable, alias);
}
/**
* Build and register a command with this dispatcher using the
* {@link ParametricBuilder} assigned on the root {@link CommandGraph}.
*
* @param object the object provided to the {@link ParametricBuilder}
* @return this object
* @see ParametricBuilder#register(com.sk89q.rebar.command.Dispatcher, Object)
*/
public DispatcherNode build(Object object) {
ParametricBuilder builder = graph.getBuilder();
if (builder == null) {
throw new RuntimeException("No ParametricBuilder set");
}
builder.register(getDispatcher(), object);
return this;
}
/**
* Create a new command that will contain sub-commands.
*
* <p>The object returned by this method can be used to add sub-commands. To
* return to this "parent" context, use {@link DispatcherNode#graph()}.</p>
*
* @param alias the list of aliases, where the first alias is the primary one
* @return an object to place sub-commands
*/
public DispatcherNode group(String... alias) {
SimpleDispatcherCommand command = new SimpleDispatcherCommand();
getDispatcher().register(command, alias);
return new DispatcherNode(graph, this, command);
}
/**
* Return the parent node.
*
* @return the parent node
* @throws RuntimeException if there is no parent node.
*/
public DispatcherNode parent() {
if (parent != null) {
return parent;
}
throw new RuntimeException("This node does not have a parent");
}
/**
* Get the root command graph.
*
* @return the root command graph
*/
public CommandGraph graph() {
return graph;
}
/**
* Get the underlying dispatcher of this object.
*
* @return the dispatcher
*/
public Dispatcher getDispatcher() {
return dispatcher;
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import com.sk89q.rebar.command.SimpleDescription;
/**
* An abstract listener.
*/
public abstract class AbstractInvokeListener implements InvokeListener {
@Override
public void updateDescription(Object object, Method method,
ParameterData[] parameters, SimpleDescription description) {
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import com.sk89q.minecraft.util.commands.CommandContext;
public interface ArgumentStack {
/**
* Get the next string, which may come from the stack or a value flag.
*
* @return the value
* @throws ParameterException on a parameter error
*/
String next() throws ParameterException;
/**
* Get the next integer, which may come from the stack or a value flag.
*
* @return the value
* @throws ParameterException on a parameter error
*/
Integer nextInt() throws ParameterException;
/**
* Get the next double, which may come from the stack or a value flag.
*
* @return the value
* @throws ParameterException on a parameter error
*/
Double nextDouble() throws ParameterException;
/**
* Get the next boolean, which may come from the stack or a value flag.
*
* @return the value
* @throws ParameterException on a parameter error
*/
Boolean nextBoolean() throws ParameterException;
/**
* Get all remaining string values, which will consume the rest of the stack.
*
* @return the value
* @throws ParameterException on a parameter error
*/
String remaining() throws ParameterException;
/**
* Set as completely consumed.
*/
void markConsumed();
/**
* Get the underlying context.
*
* @return the context
*/
CommandContext getContext();
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Type;
import java.util.List;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.rebar.command.binding.PrimitiveBindings;
import com.sk89q.rebar.command.binding.StandardBindings;
/**
* Used to parse user input for a command, based on available method types
* and annotations.
*
* <p>A binding can be used to handle several types at once. For a binding to be
* called, it must be registered with a {@link ParametricBuilder} with
* {@link ParametricBuilder#addBinding(Binding, java.lang.reflect.Type...)}.</p>
*
* @see PrimitiveBindings an example of primitive bindings
* @see StandardBindings standard bindings
*/
public interface Binding {
/**
* Get the types that this binding handles.
*
* @return the types
*/
Type[] getTypes();
/**
* Get how this binding consumes from a {@link ArgumentStack}.
*
* @param parameter information about the parameter
* @return the behavior
*/
BindingBehavior getBehavior(ParameterData parameter);
/**
* Get the number of arguments that this binding will consume, if this
* information is available.
*
* <p>This method must return -1 for binding behavior types that are not
* {@link BindingBehavior#CONSUMES}.</p>
*
* @param parameter information about the parameter
* @return the number of consumed arguments, or -1 if unknown or irrelevant
*/
int getConsumedCount(ParameterData parameter);
/**
* Attempt to consume values (if required) from the given {@link ArgumentStack}
* in order to instantiate an object for the given parameter.
*
* @param parameter information about the parameter
* @param scoped the arguments the user has input
* @param onlyConsume true to only consume arguments
* @return an object parsed for the given parameter
* @throws ParameterException thrown if the parameter could not be formulated
* @throws CommandException on a command exception
*/
Object bind(ParameterData parameter, ArgumentStack scoped, boolean onlyConsume)
throws ParameterException, CommandException;
/**
* Get a list of suggestions for the given parameter and user arguments.
*
* @param parameter information about the parameter
* @param prefix what the user has typed so far (may be an empty string)
* @return a list of suggestions
*/
List<String> getSuggestions(ParameterData parameter, String prefix);
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import com.sk89q.minecraft.util.commands.CommandLocals;
import com.sk89q.rebar.command.binding.Switch;
/**
* Determines the type of binding.
*/
public enum BindingBehavior {
/**
* Always consumes from a {@link ArgumentStack}.
*/
CONSUMES,
/**
* Sometimes consumes from a {@link ArgumentStack}.
*
* <p>Bindings that exhibit this behavior must be defined as a {@link Switch}
* by commands utilizing the given binding.</p>
*/
INDETERMINATE,
/**
* Never consumes from a {@link ArgumentStack}.
*
* <p>Bindings that exhibit this behavior generate objects from other sources,
* such as from a {@link CommandLocals}. These are "magic" bindings that inject
* variables.</p>
*/
PROVIDES;
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.sk89q.minecraft.util.commands.CommandException;
/**
* A binding helper that uses the {@link BindingMatch} annotation to make
* writing bindings extremely easy.
*
* <p>Methods must have the following and only the following parameters:</p>
*
* <ul>
* <li>A {@link ArgumentStack}</li>
* <li>A {@link Annotation} <strong>if there is a classifier set</strong></li>
* <li>A {@link Annotation}[]
* <strong>if there {@link BindingMatch#provideModifiers()} is true</strong></li>
* </ul>
*
* <p>Methods may throw any exception. Exceptions may be converted using a
* {@link ExceptionConverter} registered with the {@link ParametricBuilder}.</p>
*/
public class BindingHelper implements Binding {
private final List<BoundMethod> bindings;
private final Type[] types;
/**
* Create a new instance.
*/
public BindingHelper() {
List<BoundMethod> bindings = new ArrayList<BoundMethod>();
List<Type> types = new ArrayList<Type>();
for (Method method : this.getClass().getMethods()) {
BindingMatch info = method.getAnnotation(BindingMatch.class);
if (info != null) {
Class<? extends Annotation> classifier = null;
// Set classifier
if (!info.classifier().equals(Annotation.class)) {
classifier = (Class<? extends Annotation>) info.classifier();
types.add(classifier);
}
for (Type t : info.type()) {
Type type = null;
// Set type
if (!t.equals(Class.class)) {
type = t;
if (classifier == null) {
types.add(type); // Only if there is no classifier set!
}
}
// Check to see if at least one is set
if (type == null && classifier == null) {
throw new RuntimeException(
"A @BindingMatch needs either a type or classifier set");
}
BoundMethod handler = new BoundMethod(info, type, classifier, method);
bindings.add(handler);
}
}
}
Collections.sort(bindings);
this.bindings = bindings;
Type[] typesArray = new Type[types.size()];
types.toArray(typesArray);
this.types = typesArray;
}
/**
* Match a {@link BindingMatch} according to the given parameter.
*
* @param parameter the parameter
* @return a binding
*/
private BoundMethod match(ParameterData parameter) {
for (BoundMethod binding : bindings) {
Annotation classifer = parameter.getClassifier();
Type type = parameter.getType();
if (binding.classifier != null) {
if (classifer != null && classifer.annotationType().equals(binding.classifier)) {
if (binding.type == null || binding.type.equals(type)) {
return binding;
}
}
} else if (binding.type.equals(type)) {
return binding;
}
}
throw new RuntimeException("Unknown type");
}
@Override
public Type[] getTypes() {
return types;
}
@Override
public int getConsumedCount(ParameterData parameter) {
return match(parameter).annotation.consumedCount();
}
@Override
public BindingBehavior getBehavior(ParameterData parameter) {
return match(parameter).annotation.behavior();
}
@Override
public Object bind(ParameterData parameter, ArgumentStack scoped,
boolean onlyConsume) throws ParameterException, CommandException {
BoundMethod binding = match(parameter);
List<Object> args = new ArrayList<Object>();
args.add(scoped);
if (binding.classifier != null) {
args.add(parameter.getClassifier());
}
if (binding.annotation.provideModifiers()) {
args.add(parameter.getModifiers());
}
if (onlyConsume && binding.annotation.behavior() == BindingBehavior.PROVIDES) {
return null; // Nothing to consume, nothing to do
}
Object[] argsArray = new Object[args.size()];
args.toArray(argsArray);
try {
return binding.method.invoke(this, argsArray);
} catch (IllegalArgumentException e) {
throw new RuntimeException(
"Processing of classifier " + parameter.getClassifier() +
" and type " + parameter.getType() + " failed for method\n" +
binding.method + "\nbecause the parameters for that method are wrong", e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
if (e.getCause() instanceof ParameterException) {
throw (ParameterException) e.getCause();
} else if (e.getCause() instanceof CommandException) {
throw (CommandException) e.getCause();
}
throw new ParameterException(e.getCause());
}
}
@Override
public List<String> getSuggestions(ParameterData parameter, String prefix) {
return new ArrayList<String>();
}
private static class BoundMethod implements Comparable<BoundMethod> {
private final BindingMatch annotation;
private final Type type;
private final Class<? extends Annotation> classifier;
private final Method method;
BoundMethod(BindingMatch annotation, Type type,
Class<? extends Annotation> classifier, Method method) {
this.annotation = annotation;
this.type = type;
this.classifier = classifier;
this.method = method;
}
@Override
public int compareTo(BoundMethod o) {
if (classifier != null && o.classifier == null) {
return -1;
} else if (classifier == null && o.classifier != null) {
return 1;
} else if (classifier != null && o.classifier != null) {
if (type != null && o.type == null) {
return -1;
} else if (type == null && o.type != null) {
return 1;
} else {
return 0;
}
} else {
return 0;
}
}
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Denotes a match of a binding.
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface BindingMatch {
/**
* The classifier.
*
* @return the classifier, or {@link Annotation} if not set
*/
Class<? extends Annotation> classifier() default Annotation.class;
/**
* The type.
*
* @return the type, or {@link Class} if not set
*/
Class<?>[] type() default Class.class;
/**
* The binding behavior.
*
* @return the behavior
*/
BindingBehavior behavior();
/**
* Get the number of arguments that this binding consumes.
*
* @return -1 if unknown or irrelevant
*/
int consumedCount() default -1;
/**
* Set whether an array of modifier annotations is provided in the list of
* arguments.
*
* @return true to provide modifiers
*/
boolean provideModifiers() default false;
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.rebar.command.MissingParameterException;
/**
* Makes an instance of a {@link CommandContext} into a stack of arguments
* that can be consumed.
*
* @see ParametricBuilder a user of this class
*/
public class ContextArgumentStack implements ArgumentStack {
private final CommandContext context;
private int index = 0;
private int markedIndex = 0;
/**
* Create a new instance using the given context.
*
* @param context the context
*/
public ContextArgumentStack(CommandContext context) {
this.context = context;
}
@Override
public String next() throws ParameterException {
try {
return context.getString(index++);
} catch (IndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public Integer nextInt() throws ParameterException {
try {
return Integer.parseInt(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Double nextDouble() throws ParameterException {
try {
return Double.parseDouble(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Boolean nextBoolean() throws ParameterException {
try {
return next().equalsIgnoreCase("true");
} catch (IndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public String remaining() throws ParameterException {
try {
String value = context.getJoinedStrings(index);
index = context.argsLength();
return value;
} catch (IndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
/**
* Get the unconsumed arguments left over, without touching the stack.
*
* @return the unconsumed arguments
*/
public String getUnconsumed() {
if (index >= context.argsLength()) {
return null;
}
return context.getJoinedStrings(index);
}
@Override
public void markConsumed() {
index = context.argsLength();
}
/**
* Return the current position.
*
* @return the position
*/
public int position() {
return index;
}
/**
* Mark the current position of the stack.
*
* <p>The marked position initially starts at 0.</p>
*/
public void mark() {
markedIndex = index;
}
/**
* Reset to the previously {@link #mark()}ed position of the stack, and return
* the arguments that were consumed between this point and that previous point.
*
* <p>The marked position initially starts at 0.</p>
*
* @return the consumed arguments
*/
public String reset() {
String value = context.getString(markedIndex, index);
index = markedIndex;
return value;
}
/**
* Return whether any arguments were consumed between the marked position
* and the current position.
*
* <p>The marked position initially starts at 0.</p>
*
* @return true if values were consumed.
*/
public boolean wasConsumed() {
return markedIndex != index;
}
/**
* Return the arguments that were consumed between this point and that marked point.
*
* <p>The marked position initially starts at 0.</p>
*
* @return the consumed arguments
*/
public String getConsumed() {
return context.getString(markedIndex, index);
}
/**
* Get the underlying context.
*
* @return the context
*/
@Override
public CommandContext getContext() {
return context;
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.WrappedCommandException;
/**
* Used to convert a recognized {@link Throwable} into an appropriate
* {@link CommandException}.
*
* <p>Methods (when invoked by a {@link ParametricBuilder}-created command) may throw
* relevant exceptions that are not caught by the command manager, but translate
* into reasonable exceptions for an application. However, unknown exceptions are
* normally simply wrapped in a {@link WrappedCommandException} and bubbled up. Only
* normal {@link CommandException}s will be printed correctly, so a converter translates
* one of these unknown exceptions into an appropriate {@link CommandException}.</p>
*
* <p>This also allows the code calling the command to not need be aware of these
* application-specific exceptions, as they will all be converted to
* {@link CommandException}s that are handled normally.</p>
*/
public interface ExceptionConverter {
/**
* Attempt to convert the given throwable into a {@link CommandException}.
*
* <p>If the exception is not recognized, then nothing should be thrown.</p>
*
* @param t the throwable
* @throws CommandException a command exception
*/
void convert(Throwable t) throws CommandException;
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.WrappedCommandException;
/**
* An implementation of an {@link ExceptionConverter} that automatically calls
* the correct method defined on this object.
*
* <p>Only public methods will be used. Methods will be called in order of decreasing
* levels of inheritance (between classes where one inherits the other). For two
* different inheritance branches, the order between them is undefined.</p>
*/
public abstract class ExceptionConverterHelper implements ExceptionConverter {
private final List<ExceptionHandler> handlers;
@SuppressWarnings("unchecked")
public ExceptionConverterHelper() {
List<ExceptionHandler> handlers = new ArrayList<ExceptionHandler>();
for (Method method : this.getClass().getMethods()) {
if (method.getAnnotation(ExceptionMatch.class) == null) {
continue;
}
Class<?>[] parameters = method.getParameterTypes();
if (parameters.length == 1) {
Class<?> cls = parameters[0];
if (Throwable.class.isAssignableFrom(cls)) {
handlers.add(new ExceptionHandler(
(Class<? extends Throwable>) cls, method));
}
}
}
Collections.sort(handlers);
this.handlers = handlers;
}
@Override
public void convert(Throwable t) throws CommandException {
Class<?> throwableClass = t.getClass();
for (ExceptionHandler handler : handlers) {
if (handler.cls.isAssignableFrom(throwableClass)) {
try {
handler.method.invoke(this, t);
} catch (InvocationTargetException e) {
if (e.getCause() instanceof CommandException) {
throw (CommandException) e.getCause();
}
throw new WrappedCommandException(e);
} catch (IllegalArgumentException e) {
throw new WrappedCommandException(e);
} catch (IllegalAccessException e) {
throw new WrappedCommandException(e);
}
}
}
}
private static class ExceptionHandler implements Comparable<ExceptionHandler> {
final Class<? extends Throwable> cls;
final Method method;
public ExceptionHandler(Class<? extends Throwable> cls, Method method) {
this.cls = cls;
this.method = method;
}
@Override
public int compareTo(ExceptionHandler o) {
if (cls.equals(o.cls)) {
return 0;
} else if (cls.isAssignableFrom(o.cls)) {
return 1;
} else {
return -1;
}
}
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Denotes a match of an exception.
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface ExceptionMatch {
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
/**
* Called before and after a command is invoked for commands executed by a command
* created using {@link ParametricBuilder}.
*
* <p>Invocation handlers are created by {@link InvokeListener}s. Multiple
* listeners and handlers can be registered, and all be run. However, if one handler
* throws an exception, future handlers will not execute and the command will
* not execute (if thrown in
* {@link #preInvoke(Object, Method, ParameterData[], Object[], CommandContext)}).</p>
*
* @see InvokeListener the factory
*/
public interface InvokeHandler {
/**
* Called before parameters are processed.
*
* @param object the object
* @param method the method
* @param parameters the list of parameters
* @param context the context
* @throws CommandException can be thrown for an error, which will stop invocation
* @throws ParameterException on parameter error
*/
void preProcess(Object object, Method method, ParameterData[] parameters,
CommandContext context) throws CommandException, ParameterException;
/**
* Called before the parameter is invoked.
*
* @param object the object
* @param method the method
* @param parameters the list of parameters
* @param args the arguments to be given to the method
* @param context the context
* @throws CommandException can be thrown for an error, which will stop invocation
* @throws ParameterException on parameter error
*/
void preInvoke(Object object, Method method, ParameterData[] parameters,
Object[] args, CommandContext context) throws CommandException, ParameterException;
/**
* Called after the parameter is invoked.
*
* @param object the object
* @param method the method
* @param parameters the list of parameters
* @param args the arguments to be given to the method
* @param context the context
* @throws CommandException can be thrown for an error
* @throws ParameterException on parameter error
*/
void postInvoke(Object object, Method method, ParameterData[] parameters,
Object[] args, CommandContext context) throws CommandException, ParameterException;
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.rebar.command.CommandCallable;
import com.sk89q.rebar.command.SimpleDescription;
/**
* Listens to events related to {@link ParametricBuilder}.
*/
public interface InvokeListener {
/**
* Create a new invocation handler.
*
* <p>An example use of an {@link InvokeHandler} would be to verify permissions
* added by the {@link CommandPermissions} annotation.</p>
*
* <p>For simple {@link InvokeHandler}, an object can implement both this
* interface and {@link InvokeHandler}.</p>
*
* @return a new invocation handler
*/
InvokeHandler createInvokeHandler();
/**
* During creation of a {@link CommandCallable} by a {@link ParametricBuilder},
* this will be called in case the description needs to be updated.
*
* @param object the object
* @param method the method
* @param parameters a list of parameters
* @param description the description to be updated
*/
void updateDescription(Object object, Method method, ParameterData[] parameters,
SimpleDescription description);
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import com.sk89q.minecraft.util.commands.Command;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.rebar.command.MissingParameterException;
import com.sk89q.rebar.command.SimpleDescription;
import com.sk89q.rebar.command.UnconsumedParameterException;
/**
* Handles legacy properties on {@link Command} such as {@link Command#min()} and
* {@link Command#max()}.
*/
public class LegacyCommandsHandler extends AbstractInvokeListener implements InvokeHandler {
@Override
public InvokeHandler createInvokeHandler() {
return this;
}
@Override
public void preProcess(Object object, Method method,
ParameterData[] parameters, CommandContext context)
throws CommandException, ParameterException {
}
@Override
public void preInvoke(Object object, Method method,
ParameterData[] parameters, Object[] args, CommandContext context)
throws ParameterException {
Command annotation = method.getAnnotation(Command.class);
if (annotation != null) {
if (context.argsLength() < annotation.min()) {
throw new MissingParameterException();
}
if (annotation.max() != -1 && context.argsLength() > annotation.max()) {
throw new UnconsumedParameterException(
context.getRemainingString(annotation.max()));
}
}
}
@Override
public void postInvoke(Object object, Method method,
ParameterData[] parameters, Object[] args, CommandContext context) {
}
@Override
public void updateDescription(Object object, Method method,
ParameterData[] parameters, SimpleDescription description) {
Command annotation = method.getAnnotation(Command.class);
// Handle the case for old commands where no usage is set and all of its
// parameters are provider bindings, so its usage information would
// be blank and would imply that there were no accepted parameters
if (annotation != null && annotation.usage().isEmpty()
&& (annotation.min() > 0 || annotation.max() > 0)) {
boolean hasUserParameters = false;
for (ParameterData parameter : parameters) {
if (parameter.getBinding().getBehavior(parameter) != BindingBehavior.PROVIDES) {
hasUserParameters = true;
return;
}
}
if (!hasUserParameters) {
description.overrideUsage("(unknown usage information)");
}
}
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates an optional parameter.
*/
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface Optional {
/**
* The default value to use if no value is set.
*
* @return a string value, or an empty list
*/
String[] value() default {};
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import com.sk89q.rebar.command.SimpleParameter;
import com.sk89q.rebar.command.binding.PrimitiveBindings;
import com.sk89q.rebar.command.binding.Range;
import com.sk89q.rebar.command.binding.Text;
/**
* Describes a parameter in detail.
*/
public class ParameterData extends SimpleParameter {
private Binding binding;
private Annotation classifier;
private Annotation[] modifiers;
private Type type;
/**
* Get the binding associated with this parameter.
*
* @return the binding
*/
public Binding getBinding() {
return binding;
}
/**
* Set the binding associated with this parameter.
*
* @param binding the binding
*/
void setBinding(Binding binding) {
this.binding = binding;
}
/**
* Set the main type of this parameter.
*
* <p>The type is normally that is used to determine which binding is used
* for a particular method's parameter.</p>
*
* @return the main type
* @see #getClassifier() which can override the type
*/
public Type getType() {
return type;
}
/**
* Set the main type of this parameter.
*
* @param type the main type
*/
void setType(Type type) {
this.type = type;
}
/**
* Get the classifier annotation.
*
* <p>Normally, the type determines what binding is called, but classifiers
* take precedence if one is found (and registered with
* {@link ParametricBuilder#addBinding(Binding, Type...)}).
* An example of a classifier annotation is {@link Text}.</p>
*
* @return the classifier annotation, null is possible
*/
public Annotation getClassifier() {
return classifier;
}
/**
* Set the classifier annotation.
*
* @param classifier the classifier annotation, null is possible
*/
void setClassifier(Annotation classifier) {
this.classifier = classifier;
}
/**
* Get a list of modifier annotations.
*
* <p>Modifier annotations are not considered in the process of choosing a binding
* for a method parameter, but they can be used to modify the behavior of a binding.
* An example of a modifier annotation is {@link Range}, which can restrict
* numeric values handled by {@link PrimitiveBindings} to be within a range. The list
* of annotations may contain a classifier and other unrelated annotations.</p>
*
* @return a list of annotations
*/
public Annotation[] getModifiers() {
return modifiers;
}
/**
* Set the list of modifiers.
*
* @param modifiers a list of annotations
*/
void setModifiers(Annotation[] modifiers) {
this.modifiers = modifiers;
}
/**
* Return the number of arguments this binding consumes.
*
* @return -1 if unknown or unavailable
*/
int getConsumedCount() {
return getBinding().getConsumedCount(this);
}
/**
* Get whether this parameter is entered by the user.
*
* @return true if this parameter is entered by the user.
*/
boolean isUserInput() {
return getBinding().getBehavior(this) != BindingBehavior.PROVIDES;
}
/**
* Get whether this parameter consumes non-flag arguments.
*
* @return true if this parameter consumes non-flag arguments
*/
boolean isNonFlagConsumer() {
return getBinding().getBehavior(this) != BindingBehavior.PROVIDES && !isValueFlag();
}
/**
* Validate this parameter and its binding.
*/
void validate(Method method, int parameterIndex) throws ParametricException {
// We can't have indeterminate consumers without @Switches otherwise
// it may screw up parameter processing for later bindings
BindingBehavior behavior = getBinding().getBehavior(this);
boolean indeterminate = (behavior == BindingBehavior.INDETERMINATE);
if (!isValueFlag() && indeterminate) {
throw new ParametricException(
"@Switch missing for indeterminate consumer\n\n" +
"Notably:\nFor the type " + type + ", the binding " +
getBinding().getClass().getCanonicalName() +
"\nmay or may not consume parameters (isIndeterminateConsumer(" + type + ") = true)" +
"\nand therefore @Switch(flag) is required for parameter #" + parameterIndex + " of \n" +
method.toGenericString());
}
// getConsumedCount() better return -1 if the BindingBehavior is not CONSUMES
if (behavior != BindingBehavior.CONSUMES && binding.getConsumedCount(this) != -1) {
throw new ParametricException(
"getConsumedCount() does not return -1 for binding " +
getBinding().getClass().getCanonicalName() +
"\neven though its behavior type is " + behavior.name() +
"\nfor parameter #" + parameterIndex + " of \n" +
method.toGenericString());
}
// getConsumedCount() should not return 0 if the BindingBehavior is not PROVIDES
if (behavior != BindingBehavior.PROVIDES && binding.getConsumedCount(this) == 0) {
throw new ParametricException(
"getConsumedCount() must not return 0 for binding " +
getBinding().getClass().getCanonicalName() +
"\nwhen its behavior type is " + behavior.name() + " and not PROVIDES " +
"\nfor parameter #" + parameterIndex + " of \n" +
method.toGenericString());
}
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
/**
* Thrown if there is an error with a parameter.
*/
public class ParameterException extends Exception {
private static final long serialVersionUID = -8255175019708245673L;
public ParameterException() {
super();
}
public ParameterException(String message) {
super(message);
}
public ParameterException(Throwable cause) {
super(cause);
}
public ParameterException(String message, Throwable cause) {
super(message, cause);
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.google.common.collect.ImmutableBiMap.Builder;
import com.sk89q.minecraft.util.commands.Command;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.rebar.command.CommandCallable;
import com.sk89q.rebar.command.Dispatcher;
import com.sk89q.rebar.command.binding.PrimitiveBindings;
import com.sk89q.rebar.command.binding.StandardBindings;
import com.sk89q.rebar.command.binding.Switch;
import com.thoughtworks.paranamer.CachingParanamer;
import com.thoughtworks.paranamer.Paranamer;
/**
* Creates commands using annotations placed on methods and individual parameters of
* such methods.
*
* @see Command defines a command
* @see Switch defines a flag
*/
public class ParametricBuilder {
private final Map<Type, Binding> bindings = new HashMap<Type, Binding>();
private final Paranamer paranamer = new CachingParanamer();
private final List<InvokeListener> invokeListeners = new ArrayList<InvokeListener>();
private final List<ExceptionConverter> exceptionConverters = new ArrayList<ExceptionConverter>();
/**
* Create a new builder.
*
* <p>This method will install {@link PrimitiveBindings} and
* {@link StandardBindings} and default bindings.</p>
*/
public ParametricBuilder() {
addBinding(new PrimitiveBindings());
addBinding(new StandardBindings());
}
/**
* Add a binding for a given type or classifier (annotation).
*
* <p>Whenever a method parameter is encountered, a binding must be found for it
* so that it can be called later to consume the stack of arguments provided by
* the user and return an object that is later passed to
* {@link Method#invoke(Object, Object...)}.</p>
*
* <p>Normally, a {@link Type} is used to discern between different bindings, but
* if this is not specific enough, an annotation can be defined and used. This
* makes it a "classifier" and it will take precedence over the base type. For
* example, even if there is a binding that handles {@link String} parameters,
* a special <code>@MyArg</code> annotation can be assigned to a {@link String}
* parameter, which will cause the {@link Builder} to consult the {@link Binding}
* associated with <code>@MyArg</code> rather than with the binding for
* the {@link String} type.</p>
*
* @param binding the binding
* @param type a list of types (if specified) to override the binding's types
*/
public void addBinding(Binding binding, Type... type) {
if (type == null || type.length == 0) {
type = binding.getTypes();
}
for (Type t : type) {
bindings.put(t, binding);
}
}
/**
* Attach an invocation listener.
*
* <p>Invocation handlers are called in order that their listeners are
* registered with a {@link ParametricBuilder}. It is not guaranteed that
* a listener may be called, in the case of a {@link CommandException} being
* thrown at any time before the appropriate listener or handler is called.
* It is possible for a
* {@link InvokeHandler#preInvoke(Object, Method, ParameterData[], Object[], CommandContext)} to
* be called for a invocation handler, but not the associated
* {@link InvokeHandler#postInvoke(Object, Method, ParameterData[], Object[], CommandContext)}.</p>
*
* <p>An example of an invocation listener is one to handle
* {@link CommandPermissions}, by first checking to see if permission is available
* in a {@link InvokeHandler#preInvoke(Object, Method, ParameterData[], Object[], CommandContext)}
* call. If permission is not found, then an appropriate {@link CommandException}
* can be thrown to cease invocation.</p>
*
* @param listener the listener
* @see InvokeHandler the handler
*/
public void attach(InvokeListener listener) {
invokeListeners.add(listener);
}
/**
* Attach an exception converter to this builder in order to wrap unknown
* {@link Throwable}s into known {@link CommandException}s.
*
* <p>Exception converters are called in order that they are registered.</p>
*
* @param converter the converter
* @see ExceptionConverter for an explanation
*/
public void attach(ExceptionConverter converter) {
exceptionConverters.add(converter);
}
/**
* Build a list of commands from methods specially annotated with {@link Command}
* (and other relevant annotations) and register them all with the given
* {@link Dispatcher}.
*
* @param dispatcher the dispatcher to register commands with
* @param object the object contain the methods
* @throws ParametricException thrown if the commands cannot be registered
*/
public void register(Dispatcher dispatcher, Object object) throws ParametricException {
for (Method method : object.getClass().getDeclaredMethods()) {
Command definition = method.getAnnotation(Command.class);
if (definition != null) {
CommandCallable callable = build(object, method, definition);
dispatcher.register(callable, definition.aliases());
}
}
}
/**
* Build a {@link CommandCallable} for the given method.
*
* @param object the object to be invoked on
* @param method the method to invoke
* @param definition the command definition annotation
* @return the command executor
* @throws ParametricException thrown on an error
*/
private CommandCallable build(Object object, Method method, Command definition)
throws ParametricException {
return new ParametricCallable(this, object, method, definition);
}
/**
* Get the object used to get method names on Java versions before 8 (assuming
* that Java 8 is given the ability to reliably reflect method names at runtime).
*
* @return the paranamer
*/
Paranamer getParanamer() {
return paranamer;
}
/**
* Get the map of bindings.
*
* @return the map of bindings
*/
Map<Type, Binding> getBindings() {
return bindings;
}
/**
* Get a list of invocation listeners.
*
* @return a list of invocation listeners
*/
List<InvokeListener> getInvokeListeners() {
return invokeListeners;
}
/**
* Get the list of exception converters.
*
* @return a list of exception converters
*/
List<ExceptionConverter> getExceptionConverters() {
return exceptionConverters;
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.annotation.Nullable;
import com.sk89q.minecraft.util.commands.Command;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.minecraft.util.commands.SuggestionContext;
import com.sk89q.minecraft.util.commands.WrappedCommandException;
import com.sk89q.rebar.command.CommandCallable;
import com.sk89q.rebar.command.InvalidUsageException;
import com.sk89q.rebar.command.MissingParameterException;
import com.sk89q.rebar.command.Parameter;
import com.sk89q.rebar.command.SimpleDescription;
import com.sk89q.rebar.command.UnconsumedParameterException;
import com.sk89q.rebar.command.binding.Switch;
/**
* The implementation of a {@link CommandCallable} for the {@link ParametricBuilder}.
*/
class ParametricCallable implements CommandCallable {
private final ParametricBuilder builder;
private final Object object;
private final Method method;
private final ParameterData[] parameters;
private final Set<Character> valueFlags = new HashSet<Character>();
private final SimpleDescription description = new SimpleDescription();
/**
* Create a new instance.
*
* @param builder the parametric builder
* @param object the object to invoke on
* @param method the method to invoke
* @param definition the command definition annotation
* @throws ParametricException thrown on an error
*/
ParametricCallable(
ParametricBuilder builder,
Object object, Method method,
Command definition) throws ParametricException {
this.builder = builder;
this.object = object;
this.method = method;
Annotation[][] annotations = method.getParameterAnnotations();
String[] names = builder.getParanamer().lookupParameterNames(method, false);
Type[] types = method.getGenericParameterTypes();
parameters = new ParameterData[types.length];
List<Parameter> userParameters = new ArrayList<Parameter>();
// This helps keep tracks of @Nullables that appear in the middle of a list
// of parameters
int numOptional = 0;
// Set permission hint
CommandPermissions permHint = method.getAnnotation(CommandPermissions.class);
if (permHint != null) {
description.setPermissions(Arrays.asList(permHint.value()));
}
// Go through each parameter
for (int i = 0; i < types.length; i++) {
Type type = types[i];
ParameterData parameter = new ParameterData();
parameter.setType(type);
parameter.setModifiers(annotations[i]);
// Search for annotations
for (Annotation annotation : annotations[i]) {
if (annotation instanceof Switch) {
parameter.setFlag(((Switch) annotation).value(), type != boolean.class);
} else if (annotation instanceof Nullable) {
parameter.setOptional(true);
} else if (annotation instanceof Optional) {
parameter.setOptional(true);
String[] value = ((Optional) annotation).value();
if (value.length > 0) {
parameter.setDefaultValue(value);
}
// Special annotation bindings
} else if (parameter.getBinding() == null) {
parameter.setBinding(builder.getBindings().get(
annotation.annotationType()));
parameter.setClassifier(annotation);
}
}
parameter.setName(names.length > 0 ?
names[i] : generateName(type, parameter.getClassifier(), i));
// Track all value flags
if (parameter.isValueFlag()) {
valueFlags.add(parameter.getFlag());
}
// No special @annotation binding... let's check for the type
if (parameter.getBinding() == null) {
parameter.setBinding(builder.getBindings().get(type));
// Don't know how to parse for this type of value
if (parameter.getBinding() == null) {
throw new ParametricException(
"Don't know how to handle the parameter type '" + type + "' in\n" +
method.toGenericString());
}
}
// Do some validation of this parameter
parameter.validate(method, i + 1);
// Keep track of optional parameters
if (parameter.isOptional() && parameter.getFlag() == null) {
numOptional++;
} else {
if (numOptional > 0 && parameter.isNonFlagConsumer()) {
if (parameter.getConsumedCount() < 0) {
throw new ParametricException(
"Found an parameter using the binding " +
parameter.getBinding().getClass().getCanonicalName() +
"\nthat does not know how many arguments it consumes, but " +
"it follows an optional parameter\nMethod: " +
method.toGenericString());
}
}
}
parameters[i] = parameter;
// Make a list of "real" parameters
if (parameter.isUserInput()) {
userParameters.add(parameter);
}
}
// Finish description
description.setDescription(!definition.desc().isEmpty() ? definition.desc() : null);
description.setHelp(!definition.help().isEmpty() ? definition.help() : null);
description.overrideUsage(!definition.usage().isEmpty() ? definition.usage() : null);
for (InvokeListener listener : builder.getInvokeListeners()) {
listener.updateDescription(object, method, parameters, description);
}
// Set parameters
description.setParameters(userParameters);
}
@Override
public void call(CommandContext context) throws CommandException {
Object[] args = new Object[parameters.length];
ContextArgumentStack arguments = new ContextArgumentStack(context);
ParameterData parameter = null;
try {
// preProcess handlers
List<InvokeHandler> handlers = new ArrayList<InvokeHandler>();
for (InvokeListener listener : builder.getInvokeListeners()) {
InvokeHandler handler = listener.createInvokeHandler();
handlers.add(handler);
handler.preProcess(object, method, parameters, context);
}
// Collect parameters
for (int i = 0; i < parameters.length; i++) {
parameter = parameters[i];
if (mayConsumeArguments(i, arguments)) {
// Parse the user input into a method argument
ArgumentStack usedArguments = getScopedContext(parameter, arguments);
try {
args[i] = parameter.getBinding().bind(parameter, usedArguments, false);
} catch (MissingParameterException e) {
// Not optional? Then we can't execute this command
if (!parameter.isOptional()) {
throw e;
}
args[i] = getDefaultValue(i, arguments);
}
} else {
args[i] = getDefaultValue(i, arguments);
}
}
// Check for unused arguments
checkUnconsumed(arguments);
// preInvoke handlers
for (InvokeHandler handler : handlers) {
handler.preInvoke(object, method, parameters, args, context);
}
// Execute!
method.invoke(object, args);
// postInvoke handlers
for (InvokeHandler handler : handlers) {
handler.postInvoke(handler, method, parameters, args, context);
}
} catch (MissingParameterException e) {
throw new InvalidUsageException(
"Too few parameters!", getDescription());
} catch (UnconsumedParameterException e) {
throw new InvalidUsageException(
"Too many parameters! Unused parameters: "
+ e.getUnconsumed(), getDescription());
} catch (ParameterException e) {
if (e.getCause() != null) {
for (ExceptionConverter converter : builder.getExceptionConverters()) {
converter.convert(e.getCause());
}
}
String name = parameter.getName();
throw new InvalidUsageException("For parameter '" + name + "': "
+ e.getMessage(), getDescription());
} catch (InvocationTargetException e) {
for (ExceptionConverter converter : builder.getExceptionConverters()) {
converter.convert(e.getCause());
}
throw new WrappedCommandException(e);
} catch (IllegalArgumentException e) {
throw new WrappedCommandException(e);
} catch (CommandException e) {
throw e;
} catch (Throwable e) {
throw new WrappedCommandException(e);
}
}
@Override
public List<String> getSuggestions(CommandContext context) throws CommandException {
ContextArgumentStack scoped = new ContextArgumentStack(context);
SuggestionContext suggestable = context.getSuggestionContext();
// For /command -f |
// For /command -f flag|
if (suggestable.forFlag()) {
for (int i = 0; i < parameters.length; i++) {
ParameterData parameter = parameters[i];
if (parameter.getFlag() == suggestable.getFlag()) {
String prefix = context.getFlag(parameter.getFlag());
if (prefix == null) {
prefix = "";
}
return parameter.getBinding().getSuggestions(parameter, prefix);
}
}
// This should not happen
return new ArrayList<String>();
}
int consumerIndex = 0;
ParameterData lastConsumer = null;
String lastConsumed = null;
for (int i = 0; i < parameters.length; i++) {
ParameterData parameter = parameters[i];
if (parameter.getFlag() != null) {
continue; // We already handled flags
}
try {
scoped.mark();
parameter.getBinding().bind(parameter, scoped, true);
if (scoped.wasConsumed()) {
lastConsumer = parameter;
lastConsumed = scoped.getConsumed();
consumerIndex++;
}
} catch (MissingParameterException e) {
// For /command value1 |value2
// For /command |value1 value2
if (suggestable.forHangingValue()) {
return parameter.getBinding().getSuggestions(parameter, "");
} else {
// For /command value1| value2
if (lastConsumer != null) {
return lastConsumer.getBinding()
.getSuggestions(lastConsumer, lastConsumed);
// For /command| value1 value2
// This should never occur
} else {
throw new RuntimeException("Invalid suggestion context");
}
}
} catch (ParameterException e) {
if (suggestable.forHangingValue()) {
String name = getDescription().getParameters()
.get(consumerIndex).getName();
throw new InvalidUsageException("For parameter '" + name + "': "
+ e.getMessage(), getDescription());
} else {
return parameter.getBinding().getSuggestions(parameter, "");
}
}
}
// For /command value1 value2 |
if (suggestable.forHangingValue()) {
// There's nothing that we can suggest because there's no more parameters
// to add on, and we can't change the previous parameter
return new ArrayList<String>();
} else {
// For /command value1 value2|
if (lastConsumer != null) {
return lastConsumer.getBinding()
.getSuggestions(lastConsumer, lastConsumed);
// This should never occur
} else {
throw new RuntimeException("Invalid suggestion context");
}
}
}
@Override
public Set<Character> getValueFlags() {
return valueFlags;
}
@Override
public SimpleDescription getDescription() {
return description;
}
/**
* Get the right {@link ArgumentStack}.
*
* @param parameter the parameter
* @param existing the existing scoped context
* @return the context to use
*/
private static ArgumentStack getScopedContext(Parameter parameter, ArgumentStack existing) {
if (parameter.getFlag() != null) {
CommandContext context = existing.getContext();
if (parameter.isValueFlag()) {
return new StringArgumentStack(
context, context.getFlag(parameter.getFlag()), false);
} else {
String v = context.hasFlag(parameter.getFlag()) ? "true" : "false";
return new StringArgumentStack(context, v, true);
}
}
return existing;
}
/**
* Get whether a parameter is allowed to consume arguments.
*
* @param i the index of the parameter
* @param scoped the scoped context
* @return true if arguments may be consumed
*/
private boolean mayConsumeArguments(int i, ContextArgumentStack scoped) {
CommandContext context = scoped.getContext();
ParameterData parameter = parameters[i];
// Flag parameters: Always consume
// Required non-flag parameters: Always consume
// Optional non-flag parameters:
// - Before required parameters: Consume if there are 'left over' args
// - At the end: Always consumes
if (parameter.isOptional() && parameter.getFlag() == null) {
int numberFree = context.argsLength() - scoped.position();
for (int j = i; j < parameters.length; j++) {
if (parameters[j].isNonFlagConsumer() && !parameters[j].isOptional()) {
// We already checked if the consumed count was > -1
// when we created this object
numberFree -= parameters[j].getConsumedCount();
}
}
// Skip this optional parameter
if (numberFree < 1) {
return false;
}
}
return true;
}
/**
* Get the default value for a parameter.
*
* @param i the index of the parameter
* @param scoped the scoped context
* @return a value
* @throws ParameterException on an error
* @throws CommandException on an error
*/
private Object getDefaultValue(int i, ContextArgumentStack scoped)
throws ParameterException, CommandException {
CommandContext context = scoped.getContext();
ParameterData parameter = parameters[i];
String[] defaultValue = parameter.getDefaultValue();
if (defaultValue != null) {
try {
return parameter.getBinding().bind(
parameter, new StringArgumentStack(
context, defaultValue, false), false);
} catch (MissingParameterException e) {
throw new ParametricException(
"The default value of the parameter using the binding " +
parameter.getBinding().getClass() + " in the method\n" +
method.toGenericString() + "\nis invalid");
}
}
return null;
}
/**
* Check to see if all arguments, including flag arguments, were consumed.
*
* @param scoped the argument scope
* @throws UnconsumedParameterException thrown if parameters were not consumed
*/
private void checkUnconsumed(ContextArgumentStack scoped)
throws UnconsumedParameterException {
CommandContext context = scoped.getContext();
String unconsumed;
String unconsumedFlags = getUnusedFlags(context);
if ((unconsumed = scoped.getUnconsumed()) != null) {
throw new UnconsumedParameterException(unconsumed + " " + unconsumedFlags);
}
if (unconsumedFlags != null) {
throw new UnconsumedParameterException(unconsumedFlags);
}
}
/**
* Get any unused flag arguments.
*
* @param context the command context
* @param parameters the list of parameters
*/
private String getUnusedFlags(CommandContext context) {
Set<Character> unusedFlags = null;
for (char flag : context.getFlags()) {
boolean found = false;
for (int i = 0; i < parameters.length; i++) {
Character paramFlag = parameters[i].getFlag();
if (paramFlag != null && flag == paramFlag) {
found = true;
break;
}
}
if (!found) {
if (unusedFlags == null) {
unusedFlags = new HashSet<Character>();
}
unusedFlags.add(flag);
}
}
if (unusedFlags != null) {
StringBuilder builder = new StringBuilder();
for (Character flag : unusedFlags) {
builder.append("-").append(flag).append(" ");
}
return builder.toString().trim();
}
return null;
}
/**
* Generate a name for a parameter.
*
* @param type the type
* @param classifier the classifier
* @param index the index
* @return a generated name
*/
private static String generateName(Type type, Annotation classifier, int index) {
if (classifier != null) {
return classifier.annotationType().getSimpleName().toLowerCase();
} else {
if (type instanceof Class<?>) {
return ((Class<?>) type).getSimpleName().toLowerCase();
} else {
return "unknown" + index;
}
}
}
}

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package com.sk89q.rebar.command.parametric;
/**
* Thrown if the {@link ParametricBuilder} can't build commands from
* an object for whatever reason.
*/
public class ParametricException extends RuntimeException {
private static final long serialVersionUID = -5426219576099680971L;
public ParametricException() {
super();
}
public ParametricException(String message, Throwable cause) {
super(message, cause);
}
public ParametricException(String message) {
super(message);
}
public ParametricException(Throwable cause) {
super(cause);
}
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import java.lang.reflect.Method;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.minecraft.util.commands.CommandException;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.minecraft.util.commands.CommandPermissionsException;
/**
* A handler for the {@link CommandPermissions} annotation.
*/
public abstract class PermissionsHandler extends AbstractInvokeListener implements InvokeHandler {
@Override
public InvokeHandler createInvokeHandler() {
return this;
}
@Override
public void preProcess(Object object, Method method,
ParameterData[] parameters, CommandContext context)
throws CommandException, ParameterException {
CommandPermissions annotation = method.getAnnotation(CommandPermissions.class);
if (annotation != null) {
for (String perm : annotation.value()) {
if (hasPermission(context, perm)) {
return;
}
}
throw new CommandPermissionsException();
}
}
@Override
public void preInvoke(Object object, Method method, ParameterData[] parameters,
Object[] args, CommandContext context) throws CommandException {
}
@Override
public void postInvoke(Object object, Method method, ParameterData[] parameters,
Object[] args, CommandContext context) throws CommandException {
}
protected abstract boolean hasPermission(CommandContext context, String permission);
}

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// $Id$
/*
* This file is a part of WorldEdit.
* Copyright (c) sk89q <http://www.sk89q.com>
* Copyright (c) the WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.rebar.command.parametric;
import com.sk89q.minecraft.util.commands.CommandContext;
import com.sk89q.rebar.command.MissingParameterException;
import com.sk89q.util.StringUtil;
/**
* A virtual scope that does not actually read from the underlying
* {@link CommandContext}.
*/
public class StringArgumentStack implements ArgumentStack {
private final boolean nonNullBoolean;
private final CommandContext context;
private final String[] arguments;
private int index = 0;
/**
* Create a new instance using the given context.
*
* @param context the context
* @param arguments a list of arguments
* @param nonNullBoolean true to have {@link #nextBoolean()} return false instead of null
*/
public StringArgumentStack(
CommandContext context, String[] arguments, boolean nonNullBoolean) {
this.context = context;
this.arguments = arguments;
this.nonNullBoolean = nonNullBoolean;
}
/**
* Create a new instance using the given context.
*
* @param context the context
* @param arguments an argument string to be parsed
* @param nonNullBoolean true to have {@link #nextBoolean()} return false instead of null
*/
public StringArgumentStack(
CommandContext context, String arguments, boolean nonNullBoolean) {
this.context = context;
this.arguments = CommandContext.split(arguments);
this.nonNullBoolean = nonNullBoolean;
}
@Override
public String next() throws ParameterException {
try {
return arguments[index++];
} catch (ArrayIndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public Integer nextInt() throws ParameterException {
try {
return Integer.parseInt(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Double nextDouble() throws ParameterException {
try {
return Double.parseDouble(next());
} catch (NumberFormatException e) {
throw new ParameterException(
"Expected a number, got '" + context.getString(index - 1) + "'");
}
}
@Override
public Boolean nextBoolean() throws ParameterException {
try {
return next().equalsIgnoreCase("true");
} catch (IndexOutOfBoundsException e) {
if (nonNullBoolean) { // Special case
return false;
}
throw new MissingParameterException();
}
}
@Override
public String remaining() throws ParameterException {
try {
String value = StringUtil.joinString(arguments, " ", index);
markConsumed();
return value;
} catch (IndexOutOfBoundsException e) {
throw new MissingParameterException();
}
}
@Override
public void markConsumed() {
index = arguments.length;
}
@Override
public CommandContext getContext() {
return context;
}
}