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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 java.io.IOException;
19  import java.io.InputStream;
20  
21  import org.apache.commons.fileupload.FileItem;
22  import org.seasar.cubby.converter.Converter;
23  
24  /**
25   * {@link FileItem}から{@link InputStream}へ変換する{@link Converter}です。
26   * 
27   * @author baba
28   */
29  public class InputStreamFileItemConverter extends AbstractFileItemConverter {
30  
31  	/**
32  	 * {@inheritDoc}
33  	 * 
34  	 * @return {@link InputStream}のクラスを返します。
35  	 */
36  	public Class<?> getObjectType() {
37  		return InputStream.class;
38  	}
39  
40  	/**
41  	 * {@inheritDoc}
42  	 * <p>
43  	 * 指定された{@link FileItem}から取得した{@link InputStream}を返します。変換時に
44  	 * {@link IOException}が発生した場合は <code>null</code> を返します。
45  	 * </p>
46  	 * 
47  	 * @return 指定された{@link FileItem}から取得した{@link InputStream}
48  	 * @see FileItem#getInputStream()
49  	 */
50  	@Override
51  	protected Object convert(final FileItem fileItem) {
52  		try {
53  			return fileItem.getInputStream();
54  		} catch (final IOException e) {
55  			return null;
56  		}
57  	}
58  
59  }