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 */ 017package org.apache.xbean.propertyeditor; 018 019import java.lang.reflect.Method; 020 021/** 022 * @version $Rev$ $Date$ 023 */ 024public class EnumConverter extends AbstractConverter { 025 026 public EnumConverter(Class type) { 027 super(type); 028 } 029 030 @Override 031 protected String toStringImpl(final Object value) { 032 return Enum.class.cast(value).name(); 033 } 034 035 @Override 036 protected Object toObjectImpl(String text) { 037 Class type = getType(); 038 039 try { 040 return Enum.valueOf(type, text); 041 } catch (Exception cause) { 042 try { 043 final int index = Integer.parseInt(text); 044 final Method method = type.getMethod("values"); 045 final Object[] values = (Object[]) method.invoke(null); 046 return values[index]; 047 } catch (final NumberFormatException e) { 048 // no-op 049 } catch (final Exception e) { 050 cause = e; 051 } 052 053 throw new PropertyEditorException("Value \"" + text + "\" cannot be converted to enum type " + type.getName(), cause); 054 } 055 } 056}