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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  
21  package org.apache.directory.server.dns.io.encoder;
22  
23  
24  import org.apache.directory.server.dns.messages.QuestionRecord;
25  import org.apache.directory.server.dns.messages.RecordClass;
26  import org.apache.directory.server.dns.messages.RecordType;
27  import org.apache.mina.common.ByteBuffer;
28  
29  
30  /**
31   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
32   * @version $Rev: 547524 $, $Date: 2007-06-15 06:42:26 +0200 (Fr, 15 Jun 2007) $
33   */
34  public class QuestionRecordEncoder
35  {
36      /**
37       * Encodes the {@link QuestionRecord} into the {@link ByteBuffer}.
38       *
39       * @param out
40       * @param question
41       */
42      public void put( ByteBuffer out, QuestionRecord question )
43      {
44          encodeDomainName( out, question.getDomainName() );
45          encodeRecordType( out, question.getRecordType() );
46          encodeRecordClass( out, question.getRecordClass() );
47      }
48  
49  
50      private void encodeDomainName( ByteBuffer byteBuffer, String domainName )
51      {
52          String[] labels = domainName.split( "\\." );
53  
54          for ( int ii = 0; ii < labels.length; ii++ )
55          {
56              byteBuffer.put( ( byte ) labels[ii].length() );
57  
58              char[] characters = labels[ii].toCharArray();
59              for ( int jj = 0; jj < characters.length; jj++ )
60              {
61                  byteBuffer.put( ( byte ) characters[jj] );
62              }
63          }
64  
65          byteBuffer.put( ( byte ) 0x00 );
66      }
67  
68  
69      private void encodeRecordType( ByteBuffer byteBuffer, RecordType recordType )
70      {
71          byteBuffer.putShort( recordType.convert() );
72      }
73  
74  
75      private void encodeRecordClass( ByteBuffer byteBuffer, RecordClass recordClass )
76      {
77          byteBuffer.putShort( recordClass.convert() );
78      }
79  }