Added mob spawner support; added 'info' tool.

src/com/sk89q/worldedit/DisallowedItemException.java

@@ -25,11 +25,16 @@ package com.sk89q.worldedit;
  */
 public class DisallowedItemException extends WorldEditException {
     private String type;
-    
+
     public DisallowedItemException(String type) {
         this.type = type;
     }
 
+    public DisallowedItemException(String type, String message) {
+        super(message);
+        this.type = type;
+    }
+
     public String getID() {
         return type;
     }

src/com/sk89q/worldedit/InvalidItemException.java

@@ -0,0 +1,30 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 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.worldedit;
+
+/**
+ *
+ * @author sk89q
+ */
+public class InvalidItemException extends DisallowedItemException {
+    public InvalidItemException(String type, String message) {
+        super(type, message);
+    }
+}

src/com/sk89q/worldedit/blocks/MobSpawnerBlock.java

@@ -0,0 +1,153 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 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.worldedit.blocks;
+
+import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.data.*;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.List;
+import java.util.ArrayList;
+import org.jnbt.*;
+
+/**
+ * Represents chests.
+ *
+ * @author sk89q
+ */
+public class MobSpawnerBlock extends BaseBlock implements TileEntityBlock {
+    /**
+     * Store mob spawn type.
+     */
+    private String mobType;
+    /**
+     * Delay until next spawn.
+     */
+    private short delay;
+
+    /**
+     * Construct the mob spawner block.
+     *
+     */
+    public MobSpawnerBlock() {
+        super(52);
+        this.mobType = "Pig";
+    }
+
+    /**
+     * Construct the mob spawner block.
+     *
+     * @param items
+     */
+    public MobSpawnerBlock(String mobType) {
+        super(52);
+        this.mobType = mobType;
+    }
+
+    /**
+     * Construct the mob spawner block.
+     *
+     * @param data
+     * @param items
+     */
+    public MobSpawnerBlock(int data, String mobType) {
+        super(52, data);
+        this.mobType = mobType;
+    }
+
+    /**
+     * Get the mob type.
+     *
+     * @return
+     */
+    public String getMobType() {
+        return mobType;
+    }
+
+    /**
+     * Set the mob type.
+     *
+     * @return
+     */
+    public void setMobType(String mobType) {
+        this.mobType = mobType;
+    }
+
+    /**
+     * @return the delay
+     */
+    public short getDelay() {
+        return delay;
+    }
+
+    /**
+     * @param delay the delay to set
+     */
+    public void setDelay(short delay) {
+        this.delay = delay;
+    }
+
+    /**
+     * Get the tile entity ID.
+     *
+     * @return
+     */
+    public String getTileEntityID() {
+        return "MobSpawner";
+    }
+
+    /**
+     * Store additional tile entity data. Returns true if the data is used.
+     *
+     * @return map of values
+     * @throws DataException
+     */
+    public Map<String,Tag> toTileEntityNBT()
+            throws DataException {
+        Map<String,Tag> values = new HashMap<String,Tag>();
+        values.put("EntityId", new StringTag("EntityId", mobType));
+        values.put("Delay", new ShortTag("Delay", (short)0));
+        return values;
+    }
+
+    /**
+     * Get additional information from the title entity data.
+     *
+     * @param values
+     * @throws DataException
+     */
+    public void fromTileEntityNBT(Map<String,Tag> values)
+            throws DataException  {
+        if (values == null) {
+            return;
+        }
+
+        Tag t = values.get("id");
+        if (!(t instanceof StringTag) || !((StringTag)t).getValue().equals("MobSpawner")) {
+            throw new DataException("'MobSpawner' tile entity expected");
+        }
+
+        StringTag mobTypeTag = (StringTag)Chunk.getChildTag(values, "EntityId", StringTag.class);
+        ShortTag delayTag = (ShortTag)Chunk.getChildTag(values, "Delay", ShortTag.class);
+
+        this.mobType = mobTypeTag.getValue();
+        this.delay = delayTag.getValue();
+    }
+}

src/com/sk89q/worldedit/data/Chunk.java

@@ -210,6 +210,17 @@ public class Chunk {
                 ((TileEntityBlock)block).fromTileEntityNBT(tileEntity);
             }
 
+            return block;
+        // Mob spawners
+        } else if (id == 52) {
+            MobSpawnerBlock block = new MobSpawnerBlock();
+
+            Map<String,Tag> tileEntity = getBlockTileEntity(pos);
+
+            if (tileEntity != null) {
+                ((TileEntityBlock)block).fromTileEntityNBT(tileEntity);
+            }
+
             return block;
         } else {
             return new BaseBlock(id, data);