001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 *
019 */
020
021 package org.apache.directory.server.dns.io.encoder;
022
023
024 import org.apache.directory.server.dns.messages.QuestionRecord;
025 import org.apache.directory.server.dns.messages.RecordClass;
026 import org.apache.directory.server.dns.messages.RecordType;
027 import org.apache.mina.core.buffer.IoBuffer;
028
029
030 /**
031 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
032 * @version $Rev: 725712 $, $Date: 2008-12-11 17:32:04 +0200 (Thu, 11 Dec 2008) $
033 */
034 public class QuestionRecordEncoder
035 {
036 /**
037 * Encodes the {@link QuestionRecord} into the {@link ByteBuffer}.
038 *
039 * @param out
040 * @param question
041 */
042 public void put( IoBuffer out, QuestionRecord question )
043 {
044 encodeDomainName( out, question.getDomainName() );
045 encodeRecordType( out, question.getRecordType() );
046 encodeRecordClass( out, question.getRecordClass() );
047 }
048
049
050 private void encodeDomainName( IoBuffer byteBuffer, String domainName )
051 {
052 String[] labels = domainName.split( "\\." );
053
054 for ( int ii = 0; ii < labels.length; ii++ )
055 {
056 byteBuffer.put( ( byte ) labels[ii].length() );
057
058 char[] characters = labels[ii].toCharArray();
059 for ( int jj = 0; jj < characters.length; jj++ )
060 {
061 byteBuffer.put( ( byte ) characters[jj] );
062 }
063 }
064
065 byteBuffer.put( ( byte ) 0x00 );
066 }
067
068
069 private void encodeRecordType( IoBuffer byteBuffer, RecordType recordType )
070 {
071 byteBuffer.putShort( recordType.convert() );
072 }
073
074
075 private void encodeRecordClass( IoBuffer byteBuffer, RecordClass recordClass )
076 {
077 byteBuffer.putShort( recordClass.convert() );
078 }
079 }