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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.filter.codec;
21  
22  import org.apache.mina.common.ByteBuffer;
23  
24  /**
25   * An exception that is thrown when {@link ProtocolDecoder}
26   * cannot understand or failed to validate the specified {@link ByteBuffer}
27   * content.
28   * 
29   * @author The Apache Directory Project (mina-dev@directory.apache.org)
30   * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $
31   */
32  public class ProtocolDecoderException extends ProtocolCodecException {
33      private static final long serialVersionUID = 3545799879533408565L;
34  
35      private String hexdump;
36  
37      /**
38       * Constructs a new instance.
39       */
40      public ProtocolDecoderException() {
41      }
42  
43      /**
44       * Constructs a new instance with the specified message.
45       */
46      public ProtocolDecoderException(String message) {
47          super(message);
48      }
49  
50      /**
51       * Constructs a new instance with the specified cause.
52       */
53      public ProtocolDecoderException(Throwable cause) {
54          super(cause);
55      }
56  
57      /**
58       * Constructs a new instance with the specified message and the specified
59       * cause.
60       */
61      public ProtocolDecoderException(String message, Throwable cause) {
62          super(message, cause);
63      }
64  
65      /**
66       * Returns the message and the hexdump of the unknown part.
67       */
68      public String getMessage() {
69          String message = super.getMessage();
70  
71          if (message == null) {
72              message = "";
73          }
74  
75          if (hexdump != null) {
76              return message + ((message.length() > 0) ? " " : "") + "(Hexdump: "
77                      + hexdump + ')';
78          } else {
79              return message;
80          }
81      }
82  
83      /**
84       * Returns the hexdump of the unknown message part.
85       */
86      public String getHexdump() {
87          return hexdump;
88      }
89  
90      /**
91       * Sets the hexdump of the unknown message part.
92       */
93      public void setHexdump(String hexdump) {
94          if (this.hexdump != null) {
95              throw new IllegalStateException(
96                      "Hexdump cannot be set more than once.");
97          }
98          this.hexdump = hexdump;
99      }
100 }