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CommandContext:

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- Adjusted comment of CommandContext(String[] args, Set<Character> valueFlags) to reflect the actual semantics
- Optimized several parts of the parser (still not happy with the frequent reallocations inside removePortionOfArray)
- Someone (unintentionally?) forgot to break if a non-flag argument was found. If this was indeed intended behaviour, just change the "break;" in line 83 to "continue;".
- Reduced the number of nested control structures a bit.
This commit is contained in:
TomyLobo 2011-09-14 18:36:10 +02:00
parent cb927d17e1
commit 6cdfd86f0b
1 changed files with 57 additions and 34 deletions
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91
src/main/java/com/sk89q/minecraft/util/commands/CommandContext.java
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@ -18,6 +18,7 @@
package com.sk89q.minecraft.util.commands;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
@ -25,7 +26,6 @@ import java.util.Set;
import static com.sk89q.util.ArrayUtil.removePortionOfArray;
public class CommandContext {
protected static final String QUOTE_CHARS = "\'\"";
protected final String[] args;
protected final Set<Character> booleanFlags = new HashSet<Character>();
protected final Map<Character, String> valueFlags = new HashMap<Character, String>();
@ -43,57 +43,80 @@ public class CommandContext {
}
/**
* @param args An array with arguments empty strings will be ignored by most things
* @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 a value flag was passed without a value.
* @throws CommandException This is thrown if flag fails for some reason.
*/
public CommandContext(String[] args, Set<Character> valueFlags) throws CommandException {
// Go through empty args and multiword args first
for (int i = 1; i < args.length; i++) {
char quotedChar;
if (args[i].length() < 1) {
for (int i = 1; i < args.length; ++i) {
final String arg = args[i];
if (arg.isEmpty()) {
args = removePortionOfArray(args, i, i, null);
} else if (QUOTE_CHARS.indexOf(args[i].charAt(0)) != -1) {
StringBuilder build = new StringBuilder();
quotedChar = args[i].charAt(0);
int endIndex = i;
for (; endIndex < args.length; endIndex++) {
if (args[endIndex].charAt(args[endIndex].length() - 1) == quotedChar) {
if (endIndex != i) build.append(" ");
build.append(args[endIndex].substring(endIndex == i ? 1 : 0, args[endIndex].length() - 1));
continue;
}
switch (arg.charAt(0)) {
case '\'':
case '"':
final StringBuilder build = new StringBuilder();
final char quotedChar = arg.charAt(0);
int endIndex;
for (endIndex = i; endIndex < args.length; ++endIndex) {
final String arg2 = args[endIndex];
if (arg2.charAt(arg2.length() - 1) == quotedChar) {
if (endIndex != i) build.append(' ');
build.append(arg2.substring(endIndex == i ? 1 : 0, arg2.length() - 1));
break;
} else if (endIndex == i) {
build.append(args[endIndex].substring(1));
build.append(arg2.substring(1));
} else {
build.append(" ").append(args[endIndex]);
build.append(' ').append(arg2);
}
}
args = removePortionOfArray(args, i, endIndex, build.toString());
}
}
if (valueFlags == null) {
valueFlags = Collections.emptySet();
}
// Then flags
for (int i = 1; i < args.length; ++i) {
if (args[i].charAt(0) == '-' && args[i].matches("^-[a-zA-Z]+$")) {
for (int k = 1; k < args[i].length(); ++k) {
if (valueFlags != null && valueFlags.contains(args[i].charAt(k))) {
int index = i + 1;
if (args.length - 1 < index) {
throw new CommandException("Value flag '" + args[i].charAt(k) + "' specified without value");
}
if (this.valueFlags.containsKey(args[i].charAt(k))) {
throw new CommandException("Value flag '" + args[i].charAt(k) + "' already given");
}
this.valueFlags.put(args[i].charAt(k), args[index]);
args = removePortionOfArray(args, index, index, null);
} else {
booleanFlags.add(args[i].charAt(k));
}
}
args = removePortionOfArray(args, i, i, null);
} else if (args[i].matches("^--$")) {
final String arg = args[i];
if (arg.charAt(0) != '-') {
break;
}
if (arg.equals("--")) {
args = removePortionOfArray(args, i, i, null);
break;
}
if (!arg.matches("^-[a-zA-Z]+$")) {
throw new CommandException("Invalid flag character given.");
}
for (int k = 1; k < arg.length(); ++k) {
final char flagName = arg.charAt(k);
if (valueFlags.contains(flagName)) {
if (this.valueFlags.containsKey(flagName)) {
throw new CommandException("Value flag '" + flagName + "' already given");
}
final int index = i + 1;
if (index >= args.length) {
throw new CommandException("Value flag '" + flagName + "' specified without value");
}
this.valueFlags.put(flagName, args[index]);
args = removePortionOfArray(args, index, index, null);
} else {
booleanFlags.add(flagName);
}
}
args = removePortionOfArray(args, i, i, null);
}
this.args = args;
}