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    1   /*
    2    *  Licensed to the Apache Software Foundation (ASF) under one
    3    *  or more contributor license agreements.  See the NOTICE file
    4    *  distributed with this work for additional information
    5    *  regarding copyright ownership.  The ASF licenses this file
    6    *  to you under the Apache License, Version 2.0 (the
    7    *  "License"); you may not use this file except in compliance
    8    *  with the License.  You may obtain a copy of the License at
    9    *
    10   *    http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   *  Unless required by applicable law or agreed to in writing,
    13   *  software distributed under the License is distributed on an
    14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   *  KIND, either express or implied.  See the License for the
    16   *  specific language governing permissions and limitations
    17   *  under the License.
    18   *
    19   */
    20  package org.apache.mina.example.sumup.codec;
    21
    22  import org.apache.mina.common.ByteBuffer;
    23  import org.apache.mina.common.IoSession;
    24  import org.apache.mina.example.sumup.message.AbstractMessage;
    25  import org.apache.mina.example.sumup.message.AddMessage;
    26  import org.apache.mina.filter.codec.ProtocolDecoderOutput;
    27  import org.apache.mina.filter.codec.demux.MessageDecoder;
    28
    29  /**
    30   * A {@link MessageDecoder} that decodes {@link AddMessage}.
    31   *
    32   * @author The Apache Directory Project (mina-dev@directory.apache.org)
    33   * @version $Rev: 555855 $, $Date: 2007-07-13 05:19:00 +0200 (Fri, 13 Jul 2007) $
    34   */
    35  public class AddMessageDecoder extends AbstractMessageDecoder {
    36
    37      public AddMessageDecoder() {
    38          super(Constants.ADD);
    39      }
    40
    41      protected AbstractMessage decodeBody(IoSession session, ByteBuffer in) {
    42          if (in.remaining() < Constants.ADD_BODY_LEN) {
    43              return null;
    44          }
    45
    46          AddMessage m = new AddMessage();
    47          m.setValue(in.getInt());
    48          return m;
    49      }
    50
    51      public void finishDecode(IoSession session, ProtocolDecoderOutput out)
    52              throws Exception {
    53      }
    54  }