Java tutorial
/* * This file is part of SpoutAPI (http://wiki.getspout.org/). * * SpoutAPI 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. * * SpoutAPI 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 org.getspout.spout.packet; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.nio.ByteBuffer; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip.Inflater; import org.apache.commons.io.output.ByteArrayOutputStream; import org.spoutcraft.spoutcraftapi.Spoutcraft; public class PacketCustomBlockChunkOverride implements CompressablePacket { private int chunkX; private int chunkZ; private byte[] data; private boolean compressed = true; public PacketCustomBlockChunkOverride() { } public PacketCustomBlockChunkOverride(short[] customIds, int x, int z) { chunkX = x; chunkZ = z; ByteBuffer buffer = ByteBuffer.allocate(customIds.length * 2); for (int i = 0; i < customIds.length; i++) { buffer.putShort(customIds[i]); } data = buffer.array(); } public int getNumBytes() { return 12 + data.length; } public void readData(DataInputStream input) throws IOException { chunkX = input.readInt(); chunkZ = input.readInt(); int size = input.readInt(); data = new byte[size]; input.readFully(data); } public void writeData(DataOutputStream output) throws IOException { output.writeInt(chunkX); output.writeInt(chunkZ); output.writeInt(data.length); output.write(data); } public void run(int playerId) { ByteBuffer buffer = ByteBuffer.allocate(data.length); buffer.put(data); short[] customIds = new short[16 * 16 * Spoutcraft.getWorld().getMaxHeight()]; for (int i = 0; i < customIds.length; i++) { customIds[i] = buffer.getShort(i * 2); } Spoutcraft.getWorld().getChunkAt(chunkX, chunkZ).setCustomBlockIds(customIds); } public void failure(int playerId) { } public PacketType getPacketType() { return PacketType.PacketCustomBlockChunkOverride; } public int getVersion() { return 0; } public void compress() { if (!compressed) { if (data != null) { Deflater deflater = new Deflater(); deflater.setInput(data); deflater.setLevel(Deflater.BEST_COMPRESSION); deflater.finish(); ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length); byte[] buffer = new byte[1024]; while (!deflater.finished()) { int bytesCompressed = deflater.deflate(buffer); bos.write(buffer, 0, bytesCompressed); } try { bos.close(); } catch (IOException e) { e.printStackTrace(); } data = bos.toByteArray(); } compressed = true; } } public void decompress() { if (compressed) { Inflater decompressor = new Inflater(); decompressor.setInput(data); ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length); byte[] buf = new byte[1024]; while (!decompressor.finished()) { try { int count = decompressor.inflate(buf); bos.write(buf, 0, count); } catch (DataFormatException e) { } } try { bos.close(); } catch (IOException e) { } data = bos.toByteArray(); } } public boolean isCompressed() { return compressed; } }