Changed Location to use Extents rather than worlds and overhauled the new Entity code a bit.

src/forge/java/com/sk89q/worldedit/forge/ForgeAdapter.java

@@ -0,0 +1,39 @@
+/*
+ * 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.forge;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.world.World;
+import net.minecraft.util.Vec3;
+
+final class ForgeAdapter {
+
+    private ForgeAdapter() {
+    }
+
+    public static World adapt(net.minecraft.world.World world) {
+        return new ForgeWorld(world);
+    }
+
+    public static Vector adapt(Vec3 vector) {
+        return new Vector(vector.xCoord, vector.yCoord, vector.zCoord);
+    }
+
+}

src/forge/java/com/sk89q/worldedit/forge/ForgeEntity.java

@@ -0,0 +1,67 @@
+/*
+ * 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.forge;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.entity.BaseEntity;
+import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.util.Location;
+import net.minecraft.entity.EntityList;
+import net.minecraft.nbt.NBTTagCompound;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+class ForgeEntity implements Entity {
+
+    private final net.minecraft.entity.Entity entity;
+
+    ForgeEntity(net.minecraft.entity.Entity entity) {
+        checkNotNull(entity);
+        this.entity = entity;
+    }
+
+    @Override
+    public BaseEntity getState() {
+        NBTTagCompound tag = new NBTTagCompound();
+        entity.writeToNBT(tag);
+        return new BaseEntity(EntityList.getEntityString(entity), NBTConverter.fromNative(tag));
+    }
+
+    @Override
+    public Location getLocation() {
+        return new Location(
+                ForgeAdapter.adapt(entity.worldObj),
+                new Vector(entity.posX, entity.posY, entity.posZ),
+                ForgeAdapter.adapt(entity.getLookVec()));
+    }
+
+    @Override
+    public Extent getExtent() {
+        return ForgeAdapter.adapt(entity.worldObj);
+    }
+
+    @Override
+    public boolean remove() {
+        entity.setDead();
+        return true;
+    }
+
+}

src/forge/java/com/sk89q/worldedit/forge/ForgeWorld.java

@@ -25,6 +25,7 @@ import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.blocks.LazyBlock;
 import com.sk89q.worldedit.entity.BaseEntity;
+import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.util.TreeGenerator.TreeType;
@@ -32,8 +33,8 @@ import com.sk89q.worldedit.world.AbstractWorld;
 import com.sk89q.worldedit.world.mapping.NullResolver;
 import com.sk89q.worldedit.world.mapping.Resolver;
 import net.minecraft.block.Block;
-import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityHanging;
+import net.minecraft.entity.EntityList;
 import net.minecraft.entity.EntityLiving;
 import net.minecraft.entity.IProjectile;
 import net.minecraft.entity.item.*;
@@ -55,7 +56,7 @@ import net.minecraft.world.gen.ChunkProviderServer;
 import javax.annotation.Nullable;
 import java.lang.ref.WeakReference;
 import java.lang.reflect.Field;
-import java.util.Collections;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.logging.Level;
@@ -227,7 +228,7 @@ public class ForgeWorld extends AbstractWorld {
         int num = 0;
         double radiusSq = radius * radius;
 
-        for (Entity obj : (Iterable<Entity>) getWorld().loadedEntityList) {
+        for (net.minecraft.entity.Entity obj : (Iterable<net.minecraft.entity.Entity>) getWorld().loadedEntityList) {
             if ((obj instanceof EntityLiving)) {
                 EntityLiving ent = (EntityLiving) obj;
 
@@ -270,7 +271,7 @@ public class ForgeWorld extends AbstractWorld {
         int num = 0;
         double radiusSq = Math.pow(radius, 2.0D);
 
-        for (Entity ent : (Iterable<Entity>) getWorld().loadedEntityList) {
+        for (net.minecraft.entity.Entity ent : (Iterable<net.minecraft.entity.Entity>) getWorld().loadedEntityList) {
             if ((radius != -1) && (origin.distanceSq(new Vector(ent.posX, ent.posY, ent.posZ)) > radiusSq)) {
                 continue;
             }
@@ -497,7 +498,7 @@ public class ForgeWorld extends AbstractWorld {
 
     @Nullable
     @Override
-    public <T> T getMetaData(com.sk89q.worldedit.entity.Entity entity, Class<T> metaDataClass) {
+    public <T> T getMetaData(Entity entity, Class<T> metaDataClass) {
         return null;
     }
 
@@ -508,14 +509,29 @@ public class ForgeWorld extends AbstractWorld {
     }
 
     @Override
-    public List<com.sk89q.worldedit.entity.Entity> getEntities() {
-        return Collections.emptyList();
+    public List<Entity> getEntities() {
+        List<Entity> entities = new ArrayList<Entity>();
+        for (Object entity : getWorld().getLoadedEntityList()) {
+            entities.add(new ForgeEntity((net.minecraft.entity.Entity) entity));
+        }
+        return entities;
     }
 
     @Nullable
     @Override
-    public com.sk89q.worldedit.entity.Entity createEntity(Location location, BaseEntity entity) {
-        return null;
+    public Entity createEntity(Location location, BaseEntity entity) {
+        World world = getWorld();
+        net.minecraft.entity.Entity createdEntity = EntityList.createEntityByName(entity.getTypeId(), world);
+        if (createdEntity != null) {
+            CompoundTag tag = entity.getNbtData();
+            if (tag != null) {
+                createdEntity.readFromNBT(NBTConverter.toNative(entity.getNbtData()));
+            }
+            world.spawnEntityInWorld(createdEntity);
+            return new ForgeEntity(createdEntity);
+        } else {
+            return null;
+        }
     }
 
     /**