/*
* 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 net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagInt;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;
import javax.annotation.Nullable;
import java.lang.reflect.Constructor;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Utility methods for setting tile entities in the world.
*/
final class TileEntityUtils {
private TileEntityUtils() {
}
/**
* Update the given tag compound with position information.
*
* @param tag the tag
* @param position the position
* @return a tag compound
*/
private static NBTTagCompound updateForSet(NBTTagCompound tag, Vector position) {
checkNotNull(tag);
checkNotNull(position);
tag.setTag("x", new NBTTagInt(position.getBlockX()));
tag.setTag("y", new NBTTagInt(position.getBlockY()));
tag.setTag("z", new NBTTagInt(position.getBlockZ()));
return tag;
}
/**
* Set a tile entity at the given location.
*
* @param world the world
* @param position the position
* @param clazz the tile entity class
* @param tag the tag for the tile entity (may be null to not set NBT data)
*/
static void setTileEntity(World world, Vector position, Class<? extends TileEntity> clazz, @Nullable NBTTagCompound tag) {
checkNotNull(world);
checkNotNull(position);
checkNotNull(clazz);
TileEntity tileEntity = constructTileEntity(world, position, clazz);
if (tileEntity == null) {
return;
}
if (tag != null) {
// Set X, Y, Z
updateForSet(tag, position);
tileEntity.readFromNBT(tag);
}
world.setTileEntity(position.getBlockX(), position.getBlockY(), position.getBlockZ(), tileEntity);
}
/**
* Set a tile entity at the given location using the tile entity ID from
* the tag.
*
* @param world the world
* @param position the position
* @param tag the tag for the tile entity (may be null to do nothing)
*/
static void setTileEntity(World world, Vector position, @Nullable NBTTagCompound tag) {
if (tag != null) {
updateForSet(tag, position);
TileEntity tileEntity = TileEntity.createAndLoadEntity(tag);
if (tileEntity != null) {
world.setTileEntity(position.getBlockX(), position.getBlockY(), position.getBlockZ(), tileEntity);
}
}
}
/**
* Construct a tile entity from the given class.
*
* @param world the world
* @param position the position
* @param clazz the class
* @return a tile entity (may be null if it failed)
*/
@Nullable
static TileEntity constructTileEntity(World world, Vector position, Class<? extends TileEntity> clazz) {
Constructor<? extends TileEntity> baseConstructor;
try {
baseConstructor = clazz.getConstructor(); // creates "blank" TE
} catch (Throwable e) {
return null; // every TE *should* have this constructor, so this isn't necessary
}
TileEntity genericTE;
try {
// Downcast here for return while retaining the type
genericTE = (TileEntity) baseConstructor.newInstance();
} catch (Throwable e) {
return null;
}
/*
genericTE.blockType = Block.blocksList[block.getId()];
genericTE.blockMetadata = block.getData();
genericTE.xCoord = pt.getBlockX();
genericTE.yCoord = pt.getBlockY();
genericTE.zCoord = pt.getBlockZ();
genericTE.worldObj = world;
*/ // handled by internal code
return genericTE;
}
}