Android Open Source - pink-ponies Protocol

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Back to project page pink-ponies.

License

The source code is released under:

Software License Agreement (BSD License) Copyright (c) 2013, Pink Ponies Team All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted prov...

Java Source Code

/**
 * Copyright (c) 2013 Alexander Konovalov, Andrey Konovalov, Sergey Voronov, Vitaly Malyshev. All
 * rights reserved. Use of this source code is governed by a BSD-style license that can be found in
 * the LICENSE file./* w ww. j a  v a 2 s. co m*/
 */

package ru.pinkponies.protocol;

import java.io.IOException;
import java.io.InvalidClassException;
import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;
import org.msgpack.MessagePack;
import org.msgpack.packer.BufferPacker;
import org.msgpack.unpacker.BufferUnpacker;

/**
 * This class provides methods related to packet packing / unpacking.
 */
public final class Protocol {
  private static final byte LOGIN_PACKET = 0;
  private static final byte CLIENT_OPTIONS_PACKET = 1;
  private static final byte SAY_PACKET = 2;
  private static final byte LOCATION_UPDATE_PACKET = 3;
  private static final byte APPLE_UPDATE_PACKET = 4;
  private static final byte QUEST_UPDATE_PACKET = 5;
  private static final byte QUEST_ACTION_PACKET = 7;

  /**
   * The underlying serialization and deserialization API.
   */
  private final MessagePack messagePack;

  /**
   * Create a new protocol class. Registers packet classes, generating fast class-specific
   * serializers / deserializers.
   */
  public Protocol() {
    this.messagePack = new MessagePack();
    this.messagePack.register(LoginPacket.class);
    this.messagePack.register(ClientOptionsPacket.class);
    this.messagePack.register(SayPacket.class);
    this.messagePack.register(PlayerUpdatePacket.class);
    this.messagePack.register(AppleUpdatePacket.class);
    this.messagePack.register(QuestUpdatePacket.class);
    this.messagePack.register(QuestActionPacket.class);
  }

  /** Packs packet into a byte array. */
  public byte[] pack(final Packet packet) throws IOException {
    if (packet == null) {
      throw new NullPointerException("Packet can not be null.");
    }

    final BufferPacker packer = this.messagePack.createBufferPacker();

    if (packet instanceof LoginPacket) {
      packer.write(LOGIN_PACKET);
      packer.write(packet);
    } else if (packet instanceof ClientOptionsPacket) {
      packer.write(CLIENT_OPTIONS_PACKET);
      packer.write(packet);
    } else if (packet instanceof SayPacket) {
      packer.write(SAY_PACKET);
      packer.write(packet);
    } else if (packet instanceof PlayerUpdatePacket) {
      packer.write(LOCATION_UPDATE_PACKET);
      packer.write(packet);
    } else if (packet instanceof AppleUpdatePacket) {
      packer.write(APPLE_UPDATE_PACKET);
      packer.write(packet);
    } else if (packet instanceof QuestUpdatePacket) {
      packer.write(QUEST_UPDATE_PACKET);
      packer.write(packet);
    } else if (packet instanceof QuestActionPacket) {
      packer.write(QUEST_ACTION_PACKET);
      packer.write(packet);
    } else {
      throw new InvalidClassException("Unknown packet type.");
    }

    return packer.toByteArray();
  }

  /** Packs packet into a byte buffer. */
  public void pack(final Packet packet, final ByteBuffer buffer) throws IOException, BufferOverflowException {
    if (packet == null) {
      throw new NullPointerException("Packet can not be null.");
    }

    buffer.put(this.pack(packet));
  }

  /** Unpacks a packet from the byte array. */
  public Packet unpack(final BufferUnpacker unpacker) throws IOException {
    final byte type = unpacker.readByte();

    if (type == LOGIN_PACKET) {
      return unpacker.read(LoginPacket.class);
    } else if (type == CLIENT_OPTIONS_PACKET) {
      return unpacker.read(ClientOptionsPacket.class);
    } else if (type == SAY_PACKET) {
      return unpacker.read(SayPacket.class);
    } else if (type == LOCATION_UPDATE_PACKET) {
      return unpacker.read(PlayerUpdatePacket.class);
    } else if (type == APPLE_UPDATE_PACKET) {
      return unpacker.read(AppleUpdatePacket.class);
    } else if (type == QUEST_UPDATE_PACKET) {
      return unpacker.read(QuestUpdatePacket.class);
    } else if (type == QUEST_ACTION_PACKET) {
      return unpacker.read(QuestActionPacket.class);
    } else {
      // FIXME(alexknvl): check if its the right type of exception
      throw new InvalidClassException("Unknown packet type.");
    }
  }

  /** Unpacks a packet from the byte array. */
  public Packet unpack(final byte[] data) throws IOException {
    final BufferUnpacker unpacker = this.messagePack.createBufferUnpacker(data);
    final Packet packet = this.unpack(unpacker);
    return packet;
  }

  /** Unpacks a packet from the byte buffer. */
  public Packet unpack(final ByteBuffer buffer) throws IOException {
    final BufferUnpacker unpacker = this.messagePack.createBufferUnpacker(buffer);
    final Packet packet = this.unpack(unpacker);
    return packet;
  }
}

Java Source Code List

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