| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| package org.apache.directory.server.dns.util; |
| |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.directory.server.i18n.I18n; |
| |
| |
| /** |
| * A map to easily get the actual Enum instance from it's value as seen in the |
| * <a href="http://www.javaspecialists.co.za/archive/newsletter.do?issue=113"> |
| * The JavaSpecialists newsletter</a>. |
| * |
| * @param <K> |
| * @param <E> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class ReverseEnumMap<K, E extends Enum<E> & EnumConverter<K>> |
| { |
| private Map<K, E> reverseMap = new HashMap<K, E>(); |
| |
| |
| /** |
| * Creates a new instance of ReverseEnumMap. |
| * |
| * @param enumType |
| */ |
| public ReverseEnumMap( Class<E> enumType ) |
| { |
| for ( E e : enumType.getEnumConstants() ) |
| { |
| reverseMap.put( e.convert(), e ); |
| } |
| } |
| |
| |
| /** |
| * Return the enum given an ordinal value. |
| * |
| * @param value |
| * @return The enum. |
| */ |
| public E get( K value ) |
| { |
| E e = reverseMap.get( value ); |
| if ( e == null ) |
| { |
| throw new IllegalArgumentException( I18n.err( I18n.ERR_650, value ) ); |
| } |
| return e; |
| } |
| } |