View Javadoc

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.apache.commons.fileupload.FileItem;
20  import org.seasar.cubby.converter.ConversionHelper;
21  
22  /**
23   * {@link FileItem}を他の型のオブジェクトに変換するクラスの抽象クラスです。
24   * 
25   * @author baba
26   */
27  public abstract class AbstractFileItemConverter extends AbstractConverter {
28  
29  	/**
30  	 * {@inheritDoc}
31  	 */
32  	@Override
33  	public boolean canConvert(final Class<?> parameterType,
34  			final Class<?> objectType) {
35  		if (parameterType == null) {
36  			return false;
37  		}
38  		if (!FileItem.class.isAssignableFrom(parameterType)) {
39  			return false;
40  		}
41  		return super.canConvert(parameterType, objectType);
42  	}
43  
44  	/**
45  	 * {@inheritDoc}
46  	 */
47  	public Object convertToObject(final Object value,
48  			final Class<?> objectType, final ConversionHelper helper) {
49  		if (value == null) {
50  			return null;
51  		}
52  		final FileItem fileItem = (FileItem) value;
53  		return convert(fileItem);
54  	}
55  
56  	/**
57  	 * {@inheritDoc}
58  	 */
59  	public String convertToString(final Object value,
60  			final ConversionHelper helper) {
61  		return null;
62  	}
63  
64  	/**
65  	 * {@link FileItem} を特定の型に変換します。
66  	 * 
67  	 * @param fileItem
68  	 *            変換元のインスタンス
69  	 * @return <code>fileItem</code>を変換したインスタンス
70  	 */
71  	protected abstract Object convert(final FileItem fileItem);
72  
73  }