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1   /*
2    * Copyright 2004-2009 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  package org.seasar.cubby.converter.impl;
17  
18  import org.seasar.cubby.action.MessageInfo;
19  import org.seasar.cubby.converter.ConversionException;
20  import org.seasar.cubby.converter.ConversionHelper;
21  
22  /**
23   * 列挙定数へ変換するコンバータです。
24   * 
25   * @author baba
26   */
27  public class EnumConverter extends AbstractConverter {
28  
29  	/**
30  	 * {@inheritDoc}
31  	 */
32  	public Class<?> getObjectType() {
33  		return Enum.class;
34  	}
35  
36  	/**
37  	 * {@inheritDoc}
38  	 */
39  	@SuppressWarnings("unchecked")
40  	public Object convertToObject(final Object value,
41  			final Class<?> objectType, final ConversionHelper helper)
42  			throws ConversionException {
43  		if (value == null) {
44  			return null;
45  		}
46  		final String name = value.toString();
47  		try {
48  			return Enum.valueOf((Class<? extends Enum>) objectType, name);
49  		} catch (final IllegalArgumentException e) {
50  			final MessageInfo messageInfo = new MessageInfo();
51  			messageInfo.setKey("valid.enum");
52  			throw new ConversionException(messageInfo, e);
53  		}
54  	}
55  
56  	/**
57  	 * {@inheritDoc}
58  	 */
59  	public String convertToString(final Object value,
60  			final ConversionHelper helper) {
61  		if (value == null) {
62  			return null;
63  		}
64  		return Enum.class.cast(value).name();
65  	}
66  
67  }