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.messages;
022
023
024import org.apache.directory.server.dns.util.EnumConverter;
025import org.apache.directory.server.dns.util.ReverseEnumMap;
026
027
028/**
029 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
030 */
031public enum OpCode implements EnumConverter<Byte>
032{
033    /** Standard query */
034    QUERY(0),
035
036    /** Inverse query */
037    IQUERY(1),
038
039    /** Server status request */
040    STATUS(2),
041
042    /** Zone transfer notification */
043    NOTIFY(4),
044
045    /** Dynamic update message */
046    UPDATE(5);
047
048    private static ReverseEnumMap<Byte, OpCode> map = new ReverseEnumMap<>( OpCode.class );
049
050    private final byte value;
051
052
053    OpCode( int value )
054    {
055        this.value = ( byte ) value;
056    }
057
058
059    public Byte convert()
060    {
061        return this.value;
062    }
063
064
065    /**
066     * Converts an ordinal value into an {@link OpCode}.
067     *
068     * @param value
069     * @return The {@link OpCode}.
070     */
071    public static OpCode convert( byte value )
072    {
073        return map.get( value );
074    }
075}