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.xbean.propertyeditor;
018    
019    import java.lang.reflect.Method;
020    
021    /**
022     * @version $Rev$ $Date$
023     */
024    public class EnumConverter extends AbstractConverter {
025    
026        public EnumConverter(Class type) {
027            super(type);
028        }
029    
030        protected Object toObjectImpl(String text) {
031            Class type = getType();
032    
033            try {
034                return Enum.valueOf(type, text);
035            } catch (Exception cause) {
036                try {
037                    int index = Integer.parseInt(text);
038                    Method method = type.getMethod("values");
039                    Object[] values = (Object[]) method.invoke(null);
040                    return values[index];
041                } catch (NumberFormatException e) {
042                } catch (Exception e) {
043                    cause = e;
044                }
045    
046                throw new PropertyEditorException("Value \"" + text + "\" cannot be converted to enum type " + type.getName(), cause);
047            }
048        }
049    }