1 /*
2 * Copyright 2004-2008 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.apache.commons.fileupload.FileItem;
19 import org.seasar.cubby.converter.ConversionHelper;
20
21 /**
22 * {@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。
23 *
24 * @author baba
25 * @since 1.1.0
26 */
27 public abstract class AbstractFileItemConverter extends AbstractConverter {
28
29 /**
30 * {@inheritDoc}
31 */
32 @Override
33 public boolean canConvert(Class<?> parameterType, Class<?> objectType) {
34 if (parameterType == null) {
35 return false;
36 }
37 if (!FileItem.class.isAssignableFrom(parameterType)) {
38 return false;
39 }
40 return super.canConvert(parameterType, objectType);
41 }
42
43 /**
44 * {@inheritDoc}
45 */
46 public Object convertToObject(final Object value, final Class<?> objectType, ConversionHelper helper) {
47 if (value == null) {
48 return null;
49 }
50 final FileItem fileItem = (FileItem) value;
51 return convert(fileItem);
52 }
53
54 /**
55 * {@inheritDoc}
56 */
57 public String convertToString(final Object value, ConversionHelper helper) {
58 return null;
59 }
60
61 /**
62 * {@link FileItem} を特定の型に変換します。
63 *
64 * @param fileItem
65 * 変換元のインスタンス
66 * @return <code>fileItem</code>を変換したインスタンス
67 */
68 protected abstract Object convert(final FileItem fileItem);
69
70 }