org.getspout.spoutapi.packet.PacketEntityInformation.java Source code

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Here is the source code for org.getspout.spoutapi.packet.PacketEntityInformation.java

Source

/*
 * This file is part of SpoutPlugin.
 *
 * Copyright (c) 2011 Spout LLC <http://www.spout.org/>
 * SpoutPlugin is licensed under the GNU Lesser General Public License.
 *
 * SpoutPlugin 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.
 *
 * SpoutPlugin 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.spoutapi.packet;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

import org.apache.commons.io.output.ByteArrayOutputStream;

import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;

import org.getspout.spoutapi.SpoutManager;
import org.getspout.spoutapi.io.SpoutInputStream;
import org.getspout.spoutapi.io.SpoutOutputStream;
import org.getspout.spoutapi.player.SpoutPlayer;

public class PacketEntityInformation implements CompressiblePacket {
    private boolean compressed = false;
    private byte[] data = null;

    public PacketEntityInformation() {
    }

    public PacketEntityInformation(List<LivingEntity> entities) {
        ByteBuffer tempbuffer = ByteBuffer.allocate(entities.size() * 20); //4 bytes for entity id, 16 for uuid
        for (Entity e : entities) {
            tempbuffer.putLong(e.getUniqueId().getLeastSignificantBits());
            tempbuffer.putLong(e.getUniqueId().getMostSignificantBits());
            tempbuffer.putInt(e.getEntityId());
        }
        data = tempbuffer.array();
    }

    @Override
    public void readData(SpoutInputStream input) throws IOException {
        int size = input.readInt();
        if (size > 0) {
            data = new byte[size];
            input.read(data);
        }
        compressed = input.readBoolean();
    }

    @Override
    public void writeData(SpoutOutputStream output) throws IOException {
        if (data != null) {
            output.writeInt(data.length);
            output.write(data);
        } else {
            output.writeInt(0);
        }
        output.writeBoolean(compressed);
    }

    @Override
    public void run(int playerId) {
        SpoutPlayer player = SpoutManager.getPlayerFromId(playerId);
        if (player != null) {
            ByteBuffer rawData = ByteBuffer.allocate(data.length);
            rawData.put(data);
            ArrayList<LivingEntity> entities = new ArrayList<LivingEntity>(data.length / 4 + 1);
            for (int i = 0; i < data.length / 4; i++) {
                int index = i * 4;
                int id = rawData.getInt(index);
                Entity entity = SpoutManager.getEntityFromId(id);
                if (entity != null && entity instanceof LivingEntity) {
                    entities.add((LivingEntity) entity);
                }
            }
            if (entities.size() > 0) {
                player.sendPacket(new PacketEntityInformation(entities));
                player.updateEntitySkins(entities);
            }
        }
    }

    @Override
    public void failure(int playerId) {
    }

    @Override
    public PacketType getPacketType() {
        return PacketType.PacketEntityInformation;
    }

    @Override
    public int getVersion() {
        return 0;
    }

    @Override
    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;
        }
    }

    @Override
    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();
        }
    }

    @Override
    public boolean isCompressed() {
        return compressed;
    }
}