Added nested command support.

src/com/sk89q/util/StringUtil.java

@@ -18,6 +18,8 @@
 
 package com.sk89q.util;
 
+import java.util.List;
+
 /**
  * String utilities.
  * 
@@ -133,4 +135,24 @@ public class StringUtil {
         }
         return buffer.toString();
     }
+
+    /**
+     * Join an list of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @return
+     */
+    public static String joinString(List<String> str, String delimiter,
+            int initialIndex) {
+        if (str.size() == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder(str.get(initialIndex).toString());
+        for (int i = initialIndex + 1; i < str.size(); i++) {
+            buffer.append(delimiter).append(str.get(i).toString());
+        }
+        return buffer.toString();
+    }
 }

src/com/sk89q/util/commands/Command.java

@@ -24,9 +24,9 @@ import java.lang.annotation.RetentionPolicy;
 @Retention(RetentionPolicy.RUNTIME)
 public @interface Command {
     String[] aliases();
-    String usage();
+    String usage() default "";
     String desc();
-    int min();
-    int max();
+    int min() default 0;
+    int max() default -1;
     String flags() default "";
 }

src/com/sk89q/util/commands/NestedCommand.java

@@ -0,0 +1,28 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.util.commands;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.RUNTIME)
+public @interface NestedCommand {
+    Class<?>[] value();
+}