001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    package org.apache.geronimo.kernel.repository;
018    
019    import java.io.Serializable;
020    import java.util.Map;
021    import java.util.HashMap;
022    
023    /**
024     * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
025     */
026    public class ImportType implements Serializable {
027        private static final long serialVersionUID = 9084371394522950958L;
028    
029        private static final Map typesByName = new HashMap();
030    
031        // todo this class imples that there are only classes and services... is that true?
032        public static final ImportType ALL = new ImportType("ALL");
033        public static final ImportType CLASSES = new ImportType("CLASSES");
034        public static final ImportType SERVICES = new ImportType("SERVICES");
035    
036        public static Object getByName(String name) {
037            ImportType type = (ImportType) typesByName.get(name);
038            if (type == null) throw new IllegalStateException("Unknown import type: " + name);
039            return type;
040        }
041    
042        private final String name;
043    
044        private ImportType(String name) {
045            this.name = name;
046            typesByName.put(name, this);
047        }
048    
049        public String getName() {
050            return name;
051        }
052    
053        public String toString() {
054            return name;
055        }
056    
057        protected Object readResolve() {
058            String name = this.name;
059            return getByName(name);
060        }
061    }