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

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

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/*
 * 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.lang.reflect.Constructor;
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.getspout.spoutapi.SpoutManager;
import org.getspout.spoutapi.io.AddonPacket;
import org.getspout.spoutapi.io.SpoutInputStream;
import org.getspout.spoutapi.io.SpoutOutputStream;
import org.getspout.spoutapi.player.SpoutPlayer;

public class PacketAddonData implements CompressiblePacket {
    private AddonPacket packet = null;
    private boolean needsCompression;
    private boolean compressed = false;
    private byte[] data;

    public PacketAddonData() {
    }

    public PacketAddonData(AddonPacket packet) {
        this.packet = packet;
        SpoutOutputStream stream = new SpoutOutputStream();
        try {
            packet.write(stream);
        } catch (Exception e) {
        }
        ByteBuffer buffer = stream.getRawBuffer();
        data = new byte[buffer.capacity() - buffer.remaining()];
        System.arraycopy(buffer.array(), 0, data, 0, data.length);
        needsCompression = data.length > 512;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void readData(SpoutInputStream input) throws IOException {
        String packetName = input.readString();
        try {
            Class<? extends AddonPacket> packetClass = AddonPacket.getPacketFromId(packetName);
            Constructor<? extends AddonPacket> constructor = null;
            Constructor<? extends AddonPacket>[] constructors = (Constructor<? extends AddonPacket>[]) packetClass
                    .getConstructors();
            for (Constructor<? extends AddonPacket> c : constructors) {
                if (c.getGenericParameterTypes().length == 0) {
                    constructor = c;
                    break;
                }
            }
            packet = constructor.newInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }

        int size = input.readInt();
        compressed = input.readBoolean();
        data = new byte[size];
        input.read(data);
    }

    @Override
    public void writeData(SpoutOutputStream output) throws IOException {
        output.writeString(AddonPacket.getPacketId(packet.getClass()));
        output.writeInt(data.length);
        output.writeBoolean(compressed);
        output.write(data);
    }

    @Override
    public void run(int playerId) {
        if (packet != null) {
            SpoutInputStream stream = new SpoutInputStream(ByteBuffer.wrap(data));
            try {
                packet.read(stream);
                SpoutPlayer player = SpoutManager.getPlayerFromId(playerId);
                if (player != null) {
                    packet.run(player);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void failure(int playerId) {
    }

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

    @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();
            compressed = false;
        }
    }

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