TextWireFormat


1   /**
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one or more
4    * contributor license agreements.  See the NOTICE file distributed with
5    * this work for additional information regarding copyright ownership.
6    * The ASF licenses this file to You under the Apache License, Version 2.0
7    * (the "License"); you may not use this file except in compliance with
8    * 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, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.activemq.transport.util;
19  
20  import java.io.DataInput  ;
21  import java.io.DataInputStream  ;
22  import java.io.DataOutput  ;
23  import java.io.DataOutputStream  ;
24  import java.io.IOException  ;
25  import java.io.Reader  ;
26  import org.apache.activemq.util.ByteArrayInputStream;
27  import org.apache.activemq.util.ByteArrayOutputStream;
28  import org.apache.activemq.util.ByteSequence;
29  import org.apache.activemq.wireformat.WireFormat;
30  
31  /**
32   * Adds the extra methods available to text based wire format implementations
33   * 
34   * @version $Revision: 1.1 $
35   */
36  public abstract class TextWireFormat implements WireFormat {
37  
38      public abstract Object   unmarshalText(String   text);    
39      public abstract Object   unmarshalText(Reader   reader);
40      public abstract String   marshalText(Object   command);
41  
42      public void marshal(Object   command, DataOutput   out) throws IOException   {
43          out.writeUTF(marshalText(command));
44      }
45  
46      public Object   unmarshal(DataInput   in) throws IOException   {
47          String   text = in.readUTF();
48          return unmarshalText(text);
49      }
50      
51      public ByteSequence marshal(Object   command) throws IOException   {
52          ByteArrayOutputStream baos = new ByteArrayOutputStream();
53          DataOutputStream   dos = new DataOutputStream  (baos);
54          marshal(command, dos);
55          dos.close();
56          return baos.toByteSequence();
57      }
58  
59      public Object   unmarshal(ByteSequence packet) throws IOException   {
60          ByteArrayInputStream stream = new ByteArrayInputStream(packet);
61          DataInputStream   dis = new DataInputStream  (stream);
62          return unmarshal(dis);
63      }
64  
65  }
66
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