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1   /*
2    * Copyright 2004-2010 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  
17  package org.seasar.cubby.converter.impl;
18  
19  import org.seasar.cubby.action.MessageInfo;
20  import org.seasar.cubby.converter.ConversionException;
21  import org.seasar.cubby.converter.ConversionHelper;
22  
23  /**
24   * 列挙定数へ変換するコンバータです。
25   * 
26   * @author baba
27   */
28  public class EnumConverter extends AbstractConverter {
29  
30  	/**
31  	 * {@inheritDoc}
32  	 */
33  	public Class<?> getObjectType() {
34  		return Enum.class;
35  	}
36  
37  	/**
38  	 * {@inheritDoc}
39  	 */
40  	@SuppressWarnings("unchecked")
41  	public Object convertToObject(final Object value,
42  			final Class<?> objectType, final ConversionHelper helper)
43  			throws ConversionException {
44  		if (value == null) {
45  			return null;
46  		}
47  		final String name = value.toString();
48  		try {
49  			return Enum.valueOf((Class<? extends Enum>) objectType, name);
50  		} catch (final IllegalArgumentException e) {
51  			final MessageInfo messageInfo = new MessageInfo();
52  			messageInfo.setKey("valid.enum");
53  			throw new ConversionException(messageInfo, e);
54  		}
55  	}
56  
57  	/**
58  	 * {@inheritDoc}
59  	 */
60  	public String convertToString(final Object value,
61  			final ConversionHelper helper) {
62  		if (value == null) {
63  			return null;
64  		}
65  		return Enum.class.cast(value).name();
66  	}
67  
68  }