Added a new preliminary mapping + metadata framework.

The eventual goal is to add:

1. Support for mapping block, etc. names (minecraft:stone, etc.)
2. Proper support for entities in WorldEdit
3. Support for querying for metadata about a block, entity, etc.
4. Extent support to biomes, structures, and so on

src/bukkit/java/com/sk89q/worldedit/bukkit/BukkitAdapter.java

@@ -0,0 +1,61 @@
+/*
+ * 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.bukkit;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.util.Vectors;
+import com.sk89q.worldedit.world.World;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Adapts between Bukkit and WorldEdit equivalent objects.
+ */
+final class BukkitAdapter {
+
+    private BukkitAdapter() {
+    }
+
+    /**
+     * Create a WorldEdit world from a Bukkit world.
+     *
+     * @param world the Bukkit world
+     * @return a WorldEdit world
+     */
+    public static World adapt(org.bukkit.World world) {
+        checkNotNull(world);
+        return new BukkitWorld(world);
+    }
+
+    /**
+     * Create a WorldEdit location from a Bukkit location.
+     *
+     * @param location the Bukkit location
+     * @return a WorldEdit location
+     */
+    public static Location adapt(org.bukkit.Location location) {
+        checkNotNull(location);
+        Vector position = BukkitUtil.toVector(location);
+        Vector direction = Vectors.fromEulerDeg(location.getYaw(), location.getPitch());
+        return new com.sk89q.worldedit.util.Location(adapt(location.getWorld()), position, direction);
+    }
+
+}

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

@@ -0,0 +1,60 @@
+/*
+ * 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.bukkit;
+
+import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.entity.metadata.Tameable;
+import com.sk89q.worldedit.internal.util.AbstractAdapter;
+import com.sk89q.worldedit.util.Location;
+import com.sk89q.worldedit.world.World;
+
+/**
+ * An adapter to adapt a Bukkit entity into a WorldEdit one.
+ */
+class BukkitEntity extends AbstractAdapter<org.bukkit.entity.Entity> implements Entity {
+
+    /**
+     * Create a new instance.
+     *
+     * @param entity the entity
+     */
+    BukkitEntity(org.bukkit.entity.Entity entity) {
+        super(entity);
+    }
+
+    @SuppressWarnings("unchecked")
+    <T> T getMetaData(Class<T> metaDataClass) {
+        if (metaDataClass == Tameable.class && getHandle() instanceof org.bukkit.entity.Tameable) {
+            return (T) new TameableAdapter((org.bukkit.entity.Tameable) getHandle());
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public World getWorld() {
+        return BukkitAdapter.adapt(getHandle().getWorld());
+    }
+
+    @Override
+    public Location getLocation() {
+        return BukkitAdapter.adapt(getHandle().getLocation());
+    }
+}

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

@@ -26,8 +26,11 @@ import com.sk89q.worldedit.blocks.*;
 import com.sk89q.worldedit.blocks.ContainerBlock;
 import com.sk89q.worldedit.blocks.NoteBlock;
 import com.sk89q.worldedit.bukkit.entity.BukkitEntity;
+import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.TreeGenerator;
+import com.sk89q.worldedit.world.mapping.NullResolver;
+import com.sk89q.worldedit.world.mapping.Resolver;
 import org.bukkit.*;
 import org.bukkit.Location;
 import org.bukkit.block.*;
@@ -38,6 +41,7 @@ import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.plugin.Plugin;
 
+import javax.annotation.Nullable;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.InputStream;
@@ -1248,4 +1252,37 @@ public class BukkitWorld extends LocalWorld {
 
         return super.setBlock(pt, block, notifyAdjacent);
     }
+
+    @Override
+    public Resolver<BaseBlock> getBlockMapping() {
+        return new NullResolver<BaseBlock>();
+    }
+
+    @Override
+    public Resolver<BaseEntity> getEntityMapping() {
+        return new NullResolver<BaseEntity>();
+    }
+
+    @Nullable
+    @Override
+    public <T> T getMetaData(BaseBlock block, Class<T> metaDataClass) {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public <T> T getMetaData(com.sk89q.worldedit.entity.Entity entity, Class<T> metaDataClass) {
+        if (entity instanceof com.sk89q.worldedit.bukkit.BukkitEntity) {
+            return ((com.sk89q.worldedit.bukkit.BukkitEntity) entity).getMetaData(metaDataClass);
+        }
+
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public <T> T getMetaData(BaseEntity entity, Class<T> metaDataClass) {
+        return null;
+    }
+
 }

src/bukkit/java/com/sk89q/worldedit/bukkit/TameableAdapter.java

@@ -0,0 +1,40 @@
+/*
+ * 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.bukkit;
+
+import com.sk89q.worldedit.entity.metadata.Tameable;
+import com.sk89q.worldedit.internal.util.AbstractAdapter;
+
+/**
+ * Adapts a Bukkit {@link org.bukkit.entity.Tameable} into a WorldEdit
+ * equivalent.
+ */
+public class TameableAdapter extends AbstractAdapter<org.bukkit.entity.Tameable> implements Tameable {
+
+    TameableAdapter(org.bukkit.entity.Tameable entity) {
+        super(entity);
+    }
+
+    @Override
+    public boolean isTamed() {
+        return getHandle().isTamed();
+    }
+
+}