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 021package org.apache.directory.server.dns.io.encoder; 022 023 024import org.apache.directory.api.util.Strings; 025import org.apache.directory.server.dns.messages.QuestionRecord; 026import org.apache.directory.server.dns.messages.RecordClass; 027import org.apache.directory.server.dns.messages.RecordType; 028import org.apache.mina.core.buffer.IoBuffer; 029 030 031/** 032 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 033 */ 034public class QuestionRecordEncoder 035{ 036 /** 037 * Encodes the {@link QuestionRecord} into the {@link IoBuffer}. 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 if ( !Strings.isEmpty( domainName ) ) 053 { 054 String[] labels = domainName.split( "\\." ); 055 056 057 for ( String label : labels ) 058 { 059 byteBuffer.put( ( byte ) label.length() ); 060 061 char[] characters = label.toCharArray(); 062 063 for ( char c : characters ) 064 { 065 byteBuffer.put( ( byte ) c ); 066 } 067 } 068 } 069 070 byteBuffer.put( ( byte ) 0x00 ); 071 } 072 073 074 private void encodeRecordType( IoBuffer byteBuffer, RecordType recordType ) 075 { 076 byteBuffer.putShort( recordType.convert() ); 077 } 078 079 080 private void encodeRecordClass( IoBuffer byteBuffer, RecordClass recordClass ) 081 { 082 byteBuffer.putShort( recordClass.convert() ); 083 } 084}