Start work on modularising masks and patterns

worldedit-core/src/main/java/com/sk89q/worldedit/internal/registry/AbstractFactory.java

@@ -21,12 +21,14 @@ package com.sk89q.worldedit.internal.registry;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import com.google.common.collect.Lists;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.input.InputParseException;
 import com.sk89q.worldedit.extension.input.NoMatchException;
 import com.sk89q.worldedit.extension.input.ParserContext;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -38,7 +40,7 @@ import java.util.List;
 public abstract class AbstractFactory<E> {
 
     protected final WorldEdit worldEdit;
-    protected final List<InputParser<E>> parsers = new ArrayList<>();
+    private final List<InputParser<E>> parsers = new ArrayList<>();
 
     /**
      * Create a new factory.
@@ -50,6 +52,17 @@ public abstract class AbstractFactory<E> {
         this.worldEdit = worldEdit;
     }
 
+    /**
+     * Gets an immutable list of parsers.
+     *
+     * To add parsers, use the register method.
+     *
+     * @return the parsers
+     */
+    public List<InputParser<E>> getParsers() {
+        return Collections.unmodifiableList(parsers);
+    }
+
     public E parseFromInput(String input, ParserContext context) throws InputParseException {
         E match;
 
@@ -64,4 +77,14 @@ public abstract class AbstractFactory<E> {
         throw new NoMatchException("No match for '" + input + "'");
     }
 
+    /**
+     * Registers an InputParser to this factory
+     *
+     * @param inputParser The input parser
+     */
+    public void register(InputParser<E> inputParser) {
+        checkNotNull(inputParser);
+
+        parsers.add(inputParser);
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/internal/registry/InputParser.java

@@ -19,10 +19,13 @@
 
 package com.sk89q.worldedit.internal.registry;
 
+import com.google.common.collect.Lists;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.extension.input.InputParseException;
 import com.sk89q.worldedit.extension.input.ParserContext;
 
+import java.util.List;
+
 /**
  * Input parser interface for {@link AbstractFactory}.
  *
@@ -33,10 +36,18 @@ public abstract class InputParser<E> {
 
     protected final WorldEdit worldEdit;
 
-    protected InputParser(WorldEdit worldEdit) {
+    public InputParser(WorldEdit worldEdit) {
         this.worldEdit = worldEdit;
     }
 
     public abstract E parseFromInput(String input, ParserContext context) throws InputParseException;
 
+    /**
+     * Gets a list of suggestions of input to this parser.
+     *
+     * @return a list of suggestions
+     */
+    public List<String> getSuggestions() {
+        return Lists.newArrayList();
+    }
 }

worldedit-core/src/main/java/com/sk89q/worldedit/internal/registry/SimpleInputParser.java

@@ -0,0 +1,71 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) 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 Foundation, either version 3 of the License, or
+ * (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 PARTICULAR PURPOSE. See the GNU Lesser 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.worldedit.internal.registry;
+
+import com.google.common.collect.Lists;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.input.InputParseException;
+import com.sk89q.worldedit.extension.input.ParserContext;
+
+import java.util.List;
+
+/**
+ * An input parser that only performs a single function from aliases.
+ *
+ * @param <E> the element
+ */
+public abstract class SimpleInputParser<E> extends InputParser<E> {
+
+    public SimpleInputParser(WorldEdit worldEdit) {
+        super(worldEdit);
+    }
+
+    /**
+     * The strings this parser matches
+     *
+     * @return the matching aliases
+     */
+    public abstract List<String> getMatchedAliases();
+
+    @Override
+    public E parseFromInput(String input, ParserContext context) throws InputParseException {
+        if (!getMatchedAliases().contains(input)) {
+            return null;
+        }
+
+        return parseFromSimpleInput(input, context);
+    }
+
+    public abstract E parseFromSimpleInput(String input, ParserContext context) throws InputParseException;
+
+    /**
+     * Gets the primary name of this matcher
+     *
+     * @return the primary match
+     */
+    public String getPrimaryMatcher() {
+        return getMatchedAliases().get(0);
+    }
+
+    @Override
+    public List<String> getSuggestions() {
+        return Lists.newArrayList(getPrimaryMatcher());
+    }
+}