1 /*
2 * Copyright 2002-2014 the original author or authors.
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, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.web.servlet.resource;
18
19 import java.io.IOException;
20
21 import org.springframework.core.io.ByteArrayResource;
22 import org.springframework.core.io.Resource;
23
24 /**
25 * An extension of {@link org.springframework.core.io.ByteArrayResource} that a
26 * {@link ResourceTransformer} can use to represent an original resource
27 * preserving all other information except the content.
28 *
29 * @author Jeremy Grelle
30 * @author Rossen Stoyanchev
31 * @since 4.1
32 */
33 public class TransformedResource extends ByteArrayResource {
34
35 private final String filename;
36
37 private final long lastModified;
38
39
40 public TransformedResource(Resource original, byte[] transformedContent) {
41 super(transformedContent);
42 this.filename = original.getFilename();
43 try {
44 this.lastModified = original.lastModified();
45 }
46 catch (IOException e) {
47 // should never happen
48 throw new IllegalArgumentException(e);
49 }
50 }
51
52
53 @Override
54 public String getFilename() {
55 return this.filename;
56 }
57
58 @Override
59 public long lastModified() throws IOException {
60 return this.lastModified;
61 }
62
63 }