Extracted CommandMapping interface.

src/main/java/com/sk89q/worldedit/util/command/CommandMapping.java

@@ -19,70 +19,37 @@
 
 package com.sk89q.worldedit.util.command;
 
-import java.util.Arrays;
-
 /**
- * Tracks a command registration.
+ * Provides information about a mapping between a command and its aliases.
  */
-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;
-    }
+public interface CommandMapping {
 
     /**
      * Get the primary alias.
-     * 
+     *
      * @return the primary alias
      */
-    public String getPrimaryAlias() {
-        return aliases[0];
-    }
-    
+    String getPrimaryAlias();
+
     /**
      * Get a list of all aliases.
-     * 
+     *
      * @return aliases
      */
-    public String[] getAllAliases() {
-        return aliases;
-    }
-    
+    String[] getAllAliases();
+
     /**
      * Get the callable
-     * 
+     *
      * @return the callable
      */
-    public CommandCallable getCallable() {
-        return callable;
-    }
+    CommandCallable getCallable();
 
     /**
      * Get the {@link Description} form the callable.
-     * 
+     *
      * @return the description
      */
-    public Description getDescription() {
-        return getCallable().getDescription();
-    }
-
-    @Override
-    public String toString() {
-        return "CommandMapping{" +
-                "aliases=" + Arrays.toString(aliases) +
-                ", callable=" + callable +
-                '}';
-    }
+    Description getDescription();
 
 }

src/main/java/com/sk89q/worldedit/util/command/SimpleCommandMapping.java

@@ -0,0 +1,72 @@
+/*
+ * 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.util.command;
+
+import java.util.Arrays;
+
+/**
+ * Tracks a command registration.
+ */
+public class SimpleCommandMapping implements 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 SimpleCommandMapping(CommandCallable callable, String... alias) {
+        super();
+        this.aliases = alias;
+        this.callable = callable;
+    }
+
+    @Override
+    public String getPrimaryAlias() {
+        return aliases[0];
+    }
+    
+    @Override
+    public String[] getAllAliases() {
+        return aliases;
+    }
+    
+    @Override
+    public CommandCallable getCallable() {
+        return callable;
+    }
+
+    @Override
+    public Description getDescription() {
+        return getCallable().getDescription();
+    }
+
+    @Override
+    public String toString() {
+        return "CommandMapping{" +
+                "aliases=" + Arrays.toString(aliases) +
+                ", callable=" + callable +
+                '}';
+    }
+
+}

src/main/java/com/sk89q/worldedit/util/command/SimpleDispatcher.java

@@ -55,7 +55,7 @@ public class SimpleDispatcher implements Dispatcher {
 
     @Override
     public void registerCommand(CommandCallable callable, String... alias) {
-        CommandMapping mapping = new CommandMapping(callable, alias);
+        CommandMapping mapping = new SimpleCommandMapping(callable, alias);
         
         // Check for replacements
         for (String a : alias) {