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.api.util.Strings;
25 import org.apache.directory.server.dns.messages.QuestionRecord;
26 import org.apache.directory.server.dns.messages.RecordClass;
27 import org.apache.directory.server.dns.messages.RecordType;
28 import org.apache.mina.core.buffer.IoBuffer;
29
30
31 /**
32 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
33 */
34 public class QuestionRecordEncoder
35 {
36 /**
37 * Encodes the {@link QuestionRecord} into the {@link IoBuffer}.
38 *
39 * @param out
40 * @param question
41 */
42 public void put( IoBuffer 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( IoBuffer byteBuffer, String domainName )
51 {
52 if ( !Strings.isEmpty( domainName ) )
53 {
54 String[] labels = domainName.split( "\\." );
55
56
57 for ( String label : labels )
58 {
59 byteBuffer.put( ( byte ) label.length() );
60
61 char[] characters = label.toCharArray();
62
63 for ( char c : characters )
64 {
65 byteBuffer.put( ( byte ) c );
66 }
67 }
68 }
69
70 byteBuffer.put( ( byte ) 0x00 );
71 }
72
73
74 private void encodeRecordType( IoBuffer byteBuffer, RecordType recordType )
75 {
76 byteBuffer.putShort( recordType.convert() );
77 }
78
79
80 private void encodeRecordClass( IoBuffer byteBuffer, RecordClass recordClass )
81 {
82 byteBuffer.putShort( recordClass.convert() );
83 }
84 }