de.dfki.kiara.netty.ByteBufferDecoder.java Source code

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Here is the source code for de.dfki.kiara.netty.ByteBufferDecoder.java

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/* KIARA - Middleware for efficient and QoS/Security-aware invocation of services and exchange of messages
 *
 * Copyright (C) 2014 German Research Center for Artificial Intelligence (DFKI)
 *
 * This library 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.
 *
 * This library 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 library. If not, see <http://www.gnu.org/licenses/>.
 */

package de.dfki.kiara.netty;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import java.nio.ByteBuffer;
import java.util.List;

/**
 *
 * @author Dmitri Rubinstein <dmitri.rubinstein@dfki.de>
 */
public class ByteBufferDecoder extends MessageToMessageDecoder<ByteBuf> {

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
        final byte[] array;
        final int offset;
        final int length = msg.readableBytes();
        if (msg.hasArray()) {
            array = msg.array();
            offset = msg.arrayOffset() + msg.readerIndex();
        } else {
            array = new byte[length];
            msg.getBytes(msg.readerIndex(), array, 0, length);
            offset = 0;
        }

        out.add(ByteBuffer.wrap(array, offset, length));
    }

}