org.spout.engine.protocol.builtin.codec.SyncedMapCodec.java Source code

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Here is the source code for org.spout.engine.protocol.builtin.codec.SyncedMapCodec.java

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/*
 * This file is part of Spout.
 *
 * Copyright (c) 2011 Spout LLC <http://www.spout.org/>
 * Spout is licensed under the Spout License Version 1.
 *
 * Spout 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.
 *
 * In addition, 180 days after any changes are published, you can use the
 * software, incorporating those changes, under the terms of the MIT license,
 * as described in the Spout License Version 1.
 *
 * Spout 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,
 * the MIT license and the Spout License Version 1 along with this program.
 * If not, see <http://www.gnu.org/licenses/> for the GNU Lesser General Public
 * License and see <http://spout.in/licensev1> for the full license, including
 * the MIT license.
 */
package org.spout.engine.protocol.builtin.codec;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;

import org.spout.api.protocol.MessageCodec;
import org.spout.api.util.ChannelBufferUtils;
import org.spout.engine.protocol.builtin.message.SyncedMapMessage;

public class SyncedMapCodec extends MessageCodec<SyncedMapMessage> {
    public SyncedMapCodec() {
        super(SyncedMapMessage.class, 0x01);
    }

    @Override
    public ChannelBuffer encode(SyncedMapMessage message) {
        ChannelBuffer buffer = ChannelBuffers.dynamicBuffer();
        buffer.writeInt(message.getMap());
        buffer.writeByte(message.getAction().ordinal());
        buffer.writeInt(message.getElements().size());
        for (Pair<Integer, String> el : message.getElements()) {
            buffer.writeInt(el.getKey());
            ChannelBufferUtils.writeString(buffer, el.getValue());
        }
        return buffer;
    }

    @Override
    public SyncedMapMessage decode(ChannelBuffer buffer) {
        final int map = buffer.readInt();
        final byte action = buffer.readByte();
        final int elementCount = buffer.readInt();
        List<Pair<Integer, String>> elements = new ArrayList<>(elementCount);
        for (int i = 0; i < elementCount; ++i) {
            final int key = buffer.readInt();
            final String value = ChannelBufferUtils.readString(buffer);
            elements.add(new ImmutablePair<>(key, value));
        }
        return new SyncedMapMessage(map, action, elements);
    }
}