/*
* 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.world.chunk;
import com.sk89q.jnbt.ByteArrayTag;
import com.sk89q.jnbt.CompoundTag;
import com.sk89q.jnbt.IntTag;
import com.sk89q.jnbt.ListTag;
import com.sk89q.jnbt.NBTUtils;
import com.sk89q.jnbt.Tag;
import com.sk89q.worldedit.BlockVector;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.blocks.BaseBlock;
import com.sk89q.worldedit.world.DataException;
import com.sk89q.worldedit.world.World;
import com.sk89q.worldedit.world.storage.InvalidFormatException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Represents an Alpha chunk.
*/
public class OldChunk implements Chunk {
private CompoundTag rootTag;
private byte[] blocks;
private byte[] data;
private int rootX;
private int rootZ;
private Map<BlockVector, Map<String,Tag>> tileEntities;
/**
* Construct the chunk with a compound tag.
*
* @param world the world
* @param tag the tag
* @throws DataException
*/
public OldChunk(World world, CompoundTag tag) throws DataException {
rootTag = tag;
blocks = NBTUtils.getChildTag(rootTag.getValue(), "Blocks", ByteArrayTag.class).getValue();
data = NBTUtils.getChildTag(rootTag.getValue(), "Data", ByteArrayTag.class).getValue();
rootX = NBTUtils.getChildTag(rootTag.getValue(), "xPos", IntTag.class).getValue();
rootZ = NBTUtils.getChildTag(rootTag.getValue(), "zPos", IntTag.class).getValue();
int size = 16 * 16 * 128;
if (blocks.length != size) {
throw new InvalidFormatException("Chunk blocks byte array expected "
+ "to be " + size + " bytes; found " + blocks.length);
}
if (data.length != (size/2)) {
throw new InvalidFormatException("Chunk block data byte array "
+ "expected to be " + size + " bytes; found " + data.length);
}
}
@Override
public int getBlockID(Vector position) throws DataException {
if(position.getBlockY() >= 128) return 0;
int x = position.getBlockX() - rootX * 16;
int y = position.getBlockY();
int z = position.getBlockZ() - rootZ * 16;
int index = y + (z * 128 + (x * 128 * 16));
try {
return blocks[index];
} catch (IndexOutOfBoundsException e) {
throw new DataException("Chunk does not contain position " + position);
}
}
@Override
public int getBlockData(Vector position) throws DataException {
if(position.getBlockY() >= 128) return 0;
int x = position.getBlockX() - rootX * 16;
int y = position.getBlockY();
int z = position.getBlockZ() - rootZ * 16;
int index = y + (z * 128 + (x * 128 * 16));
boolean shift = index % 2 == 0;
index /= 2;
try {
if (!shift) {
return (data[index] & 0xF0) >> 4;
} else {
return data[index] & 0xF;
}
} catch (IndexOutOfBoundsException e) {
throw new DataException("Chunk does not contain position " + position);
}
}
/**
* Used to load the tile entities.
*
* @throws DataException
*/
private void populateTileEntities() throws DataException {
List<Tag> tags = NBTUtils.getChildTag(
rootTag.getValue(), "TileEntities", ListTag.class)
.getValue();
tileEntities = new HashMap<BlockVector, Map<String, Tag>>();
for (Tag tag : tags) {
if (!(tag instanceof CompoundTag)) {
throw new InvalidFormatException("CompoundTag expected in TileEntities");
}
CompoundTag t = (CompoundTag) tag;
int x = 0;
int y = 0;
int z = 0;
Map<String, Tag> values = new HashMap<String, Tag>();
for (Map.Entry<String, Tag> entry : t.getValue().entrySet()) {
if (entry.getKey().equals("x")) {
if (entry.getValue() instanceof IntTag) {
x = ((IntTag) entry.getValue()).getValue();
}
} else if (entry.getKey().equals("y")) {
if (entry.getValue() instanceof IntTag) {
y = ((IntTag) entry.getValue()).getValue();
}
} else if (entry.getKey().equals("z")) {
if (entry.getValue() instanceof IntTag) {
z = ((IntTag) entry.getValue()).getValue();
}
}
values.put(entry.getKey(), entry.getValue());
}
BlockVector vec = new BlockVector(x, y, z);
tileEntities.put(vec, values);
}
}
/**
* Get the map of tags keyed to strings for a block's tile entity data. May
* return null if there is no tile entity data. Not public yet because
* what this function returns isn't ideal for usage.
*
* @param position the position
* @return a tag
* @throws DataException
*/
private CompoundTag getBlockTileEntity(Vector position) throws DataException {
if (tileEntities == null) {
populateTileEntities();
}
Map<String, Tag> values = tileEntities.get(new BlockVector(position));
if (values == null) {
return null;
}
return new CompoundTag(values);
}
@Override
public BaseBlock getBlock(Vector position) throws DataException {
int id = getBlockID(position);
int data = getBlockData(position);
BaseBlock block;
/*if (id == BlockID.WALL_SIGN || id == BlockID.SIGN_POST) {
block = new SignBlock(id, data);
} else if (id == BlockID.CHEST) {
block = new ChestBlock(data);
} else if (id == BlockID.FURNACE || id == BlockID.BURNING_FURNACE) {
block = new FurnaceBlock(id, data);
} else if (id == BlockID.DISPENSER) {
block = new DispenserBlock(data);
} else if (id == BlockID.MOB_SPAWNER) {
block = new MobSpawnerBlock(data);
} else if (id == BlockID.NOTE_BLOCK) {
block = new NoteBlock(data);
} else {*/
block = new BaseBlock(id, data);
//}
CompoundTag tileEntity = getBlockTileEntity(position);
if (tileEntity != null) {
block.setNbtData(tileEntity);
}
return block;
}
}