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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    *
    9    * http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   **/
    18
    19  package org.codehaus.activemq.message;
    20
    21  import org.codehaus.activemq.util.JMSExceptionHelper;
    22
    23  import javax.jms.JMSException;
    24  import java.io.Externalizable;
    25  import java.io.IOException;
    26  import java.io.ObjectInput;
    27  import java.io.ObjectOutput;
    28
    29  /***
    30   * A helper class for using Packet instances with object serialization
    31   *
    32   * @version $Revision: 1.4 $
    33   */
    34  public class PacketFacade implements Externalizable {
    35
    36      private static final WireFormat wireFormat = new DefaultWireFormat();
    37
    38      private transient Packet packet;
    39
    40      public PacketFacade() {
    41      }
    42
    43      public PacketFacade(Packet packet) {
    44          this.packet = packet;
    45      }
    46
    47      public Packet getPacket() {
    48          return packet;
    49      }
    50
    51      public void writeExternal(ObjectOutput out) throws IOException {
    52          try {
    53              wireFormat.writePacket(packet, out);
    54          }
    55          catch (JMSException e) {
    56              throw JMSExceptionHelper.newIOException(e);
    57          }
    58      }
    59
    60      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
    61          int type = in.readByte();
    62          packet = wireFormat.readPacket(type, in);
    63      }
    64  }