Added basic entity handling with copy and paste.

Paintings do not currently respawn properly, entity pastes cannot be undone yet, and schematics do not yet store entities
@celticminstrel needs to fix painting spawning

src/main/java/com/sk89q/worldedit/bukkit/BukkitUtil.java

@@ -23,8 +23,16 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import com.sk89q.worldedit.bukkit.entity.BukkitEntity;
+import com.sk89q.worldedit.bukkit.entity.BukkitExpOrb;
+import com.sk89q.worldedit.bukkit.entity.BukkitItem;
+import com.sk89q.worldedit.bukkit.entity.BukkitPainting;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.ExperienceOrb;
+import org.bukkit.entity.Item;
+import org.bukkit.entity.Painting;
 import org.bukkit.entity.Player;
 import org.bukkit.Server;
 import org.bukkit.World;
@@ -139,4 +147,18 @@ public class BukkitUtil {
     public static World toWorld(final LocalWorld world) {
         return ((BukkitWorld) world).getWorld();
     }
+
+    public static BukkitEntity toLocalEntity(Entity e) {
+        switch (e.getType()) {
+            case EXPERIENCE_ORB:
+                return new BukkitExpOrb(toLocation(e.getLocation()), e.getUniqueId(), ((ExperienceOrb)e).getExperience());
+            /*case PAINTING: // TODO: Figure out what celticminstrel broke
+                Painting paint = (Painting) e;
+                return new BukkitPainting(toLocation(e.getLocation()), paint.getArt(), paint.getFacing(), e.getUniqueId());*/
+            case DROPPED_ITEM:
+                return new BukkitItem(toLocation(e.getLocation()), ((Item)e).getItemStack(), e.getUniqueId());
+            default:
+                return new BukkitEntity(toLocation(e.getLocation()), e.getType(), e.getUniqueId());
+        }
+    }
 }

src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -19,11 +19,19 @@
 
 package com.sk89q.worldedit.bukkit;
 
+import java.util.ArrayList;
 import java.util.EnumMap;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
 import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.WeakHashMap;
 
+import com.sk89q.worldedit.LocalEntity;
 import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.bukkit.entity.BukkitEntity;
 import com.sk89q.worldedit.util.TreeGenerator;
 import org.bukkit.block.Biome;
 import org.bukkit.block.Block;
@@ -892,4 +900,34 @@ public class BukkitWorld extends LocalWorld {
     public void simulateBlockMine(Vector pt) {
         world.getBlockAt(pt.getBlockX(), pt.getBlockY(), pt.getBlockZ()).breakNaturally();
     }
+
+    public LocalEntity[] getEntities(Region region) {
+        List<BukkitEntity> entities = new ArrayList<BukkitEntity>();
+        for (Vector2D pt : region.getChunks()) {
+            if (world.isChunkLoaded(pt.getBlockX(), pt.getBlockZ())) {
+                Entity[] ents = world.getChunkAt(pt.getBlockX(), pt.getBlockZ()).getEntities();
+                for (Entity ent : ents) {
+                    if (region.contains(BukkitUtil.toVector(ent.getLocation()))) {
+                        entities.add(BukkitUtil.toLocalEntity(ent));
+                    }
+                }
+            }
+        }
+        return entities.toArray(new BukkitEntity[entities.size()]);
+    }
+
+    public int killEntities(LocalEntity... entities) {
+        int amount = 0;
+        Set<UUID> toKill = new HashSet<UUID>();
+        for (LocalEntity entity : entities) {
+            toKill.add(((BukkitEntity) entity).getEntityId());
+        }
+        for (Entity entity : world.getEntities()) {
+            if (toKill.contains(entity.getUniqueId())) {
+                entity.remove();
+                ++amount;
+            }
+        }
+        return amount;
+    }
 }

src/main/java/com/sk89q/worldedit/bukkit/entity/BukkitEntity.java

@@ -0,0 +1,50 @@
+/*
+ * WorldEdit
+ * Copyright (C) 2012 sk89q <http://www.sk89q.com> and contributors
+ *
+ * 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.bukkit.entity;
+
+import com.sk89q.worldedit.LocalEntity;
+import com.sk89q.worldedit.Location;
+import com.sk89q.worldedit.bukkit.BukkitUtil;
+import org.bukkit.entity.EntityType;
+
+import java.util.UUID;
+
+/**
+ * @author zml2008
+ */
+public class BukkitEntity extends LocalEntity {
+    private final EntityType type;
+    private final UUID entityId;
+
+    public BukkitEntity(Location loc, EntityType type, UUID entityId) {
+        super(loc);
+        this.type = type;
+        this.entityId = entityId;
+    }
+
+    public UUID getEntityId() {
+        return entityId;
+    }
+
+    @Override
+    public boolean spawn(Location weLoc) {
+        org.bukkit.Location loc = BukkitUtil.toLocation(weLoc);
+        return loc.getWorld().spawnCreature(loc, type) != null;
+    }
+}

src/main/java/com/sk89q/worldedit/bukkit/entity/BukkitExpOrb.java

@@ -0,0 +1,49 @@
+/*
+ * WorldEdit
+ * Copyright (C) 2012 sk89q <http://www.sk89q.com> and contributors
+ *
+ * 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.bukkit.entity;
+
+import com.sk89q.worldedit.Location;
+import com.sk89q.worldedit.bukkit.BukkitUtil;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.ExperienceOrb;
+
+import java.util.UUID;
+
+/**
+ * @author zml2008
+ */
+public class BukkitExpOrb extends BukkitEntity {
+    private final int amount;
+
+    public BukkitExpOrb(Location loc, UUID entityId, int amount) {
+        super(loc, EntityType.EXPERIENCE_ORB, entityId);
+        this.amount = amount;
+    }
+
+    @Override
+    public boolean spawn(Location weLoc) {
+        org.bukkit.Location loc = BukkitUtil.toLocation(weLoc);
+        ExperienceOrb orb = loc.getWorld().spawn(loc, ExperienceOrb.class);
+        if (orb != null) {
+            orb.setExperience(amount);
+            return true;
+        }
+        return false;
+    }
+}

src/main/java/com/sk89q/worldedit/bukkit/entity/BukkitItem.java

@@ -0,0 +1,43 @@
+/*
+ * WorldEdit
+ * Copyright (C) 2012 sk89q <http://www.sk89q.com> and contributors
+ *
+ * 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.bukkit.entity;
+
+import com.sk89q.worldedit.Location;
+import com.sk89q.worldedit.bukkit.BukkitUtil;
+import org.bukkit.entity.EntityType;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.UUID;
+
+/**
+ * @author zml2008
+ */
+public class BukkitItem extends BukkitEntity {
+    private final ItemStack stack;
+    public BukkitItem(Location loc, ItemStack stack, UUID entityId) {
+        super(loc, EntityType.DROPPED_ITEM, entityId);
+        this.stack = stack;
+    }
+
+    @Override
+    public boolean spawn(Location weLoc) {
+        org.bukkit.Location loc = BukkitUtil.toLocation(weLoc);
+        return loc.getWorld().dropItem(loc, stack) != null;
+    }
+}

src/main/java/com/sk89q/worldedit/bukkit/entity/BukkitPainting.java

@@ -0,0 +1,52 @@
+/*
+ * WorldEdit
+ * Copyright (C) 2012 sk89q <http://www.sk89q.com> and contributors
+ *
+ * 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.bukkit.entity;
+
+import com.sk89q.worldedit.Location;
+import com.sk89q.worldedit.bukkit.BukkitUtil;
+import org.bukkit.Art;
+import org.bukkit.block.BlockFace;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Painting;
+
+import java.util.UUID;
+
+/**
+ * @author zml2008
+ */
+public class BukkitPainting extends BukkitEntity {
+    private final Art art;
+    private final BlockFace facingDirection;
+    public BukkitPainting(Location loc, Art art, BlockFace facingDirection, UUID entityId) {
+        super(loc, EntityType.PAINTING, entityId);
+        this.art = art;
+        this.facingDirection = facingDirection;
+    }
+
+    public boolean spawn(Location weLoc) {
+        org.bukkit.Location loc = BukkitUtil.toLocation(weLoc);
+        Painting paint = loc.getWorld().spawn(loc, Painting.class);
+        if (paint != null) {
+            paint.setFacingDirection(facingDirection);
+            paint.setArt(art);
+            return true;
+        }
+        return false;
+    }
+}