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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package ch.cern.hbase.thirdparty.io.netty.handler.codec;

import ch.cern.hbase.thirdparty.io.netty.buffer.ByteBuf;
import ch.cern.hbase.thirdparty.io.netty.channel.ChannelHandlerContext;
import ch.cern.hbase.thirdparty.io.netty.channel.ChannelPipeline;
import ch.cern.hbase.thirdparty.io.netty.channel.socket.DatagramPacket;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.protobuf.ProtobufDecoder;
import static ch.cern.hbase.thirdparty.io.netty.util.internal.ObjectUtil.checkNotNull;

import java.util.List;

/**
 * A decoder that decodes the content of the received {@link DatagramPacket} using
 * the specified {@link ByteBuf} decoder. E.g.,
 *
 * 

 * {@link ChannelPipeline} pipeline = ...;
 * pipeline.addLast("udpDecoder", new {@link DatagramPacketDecoder}(new {@link ProtobufDecoder}(...));
 * 
*/ public class DatagramPacketDecoder extends MessageToMessageDecoder { private final MessageToMessageDecoder decoder; /** * Create a {@link DatagramPacket} decoder using the specified {@link ByteBuf} decoder. * * @param decoder the specified {@link ByteBuf} decoder */ public DatagramPacketDecoder(MessageToMessageDecoder decoder) { this.decoder = checkNotNull(decoder, "decoder"); } @Override public boolean acceptInboundMessage(Object msg) throws Exception { if (msg instanceof DatagramPacket) { return decoder.acceptInboundMessage(((DatagramPacket) msg).content()); } return false; } @Override protected void decode(ChannelHandlerContext ctx, DatagramPacket msg, List out) throws Exception { decoder.decode(ctx, msg.content(), out); } @Override public void channelRegistered(ChannelHandlerContext ctx) throws Exception { decoder.channelRegistered(ctx); } @Override public void channelUnregistered(ChannelHandlerContext ctx) throws Exception { decoder.channelUnregistered(ctx); } @Override public void channelActive(ChannelHandlerContext ctx) throws Exception { decoder.channelActive(ctx); } @Override public void channelInactive(ChannelHandlerContext ctx) throws Exception { decoder.channelInactive(ctx); } @Override public void channelReadComplete(ChannelHandlerContext ctx) throws Exception { decoder.channelReadComplete(ctx); } @Override public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception { decoder.userEventTriggered(ctx, evt); } @Override public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception { decoder.channelWritabilityChanged(ctx); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { decoder.exceptionCaught(ctx, cause); } @Override public void handlerAdded(ChannelHandlerContext ctx) throws Exception { decoder.handlerAdded(ctx); } @Override public void handlerRemoved(ChannelHandlerContext ctx) throws Exception { decoder.handlerRemoved(ctx); } @Override public boolean isSharable() { return decoder.isSharable(); } }