1 /*
2 * Copyright 2008 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.ws.transport.http;
18
19 import java.io.File;
20 import java.net.URI;
21 import java.net.URISyntaxException;
22 import javax.xml.transform.Source;
23 import javax.xml.transform.dom.DOMSource;
24
25 import org.w3c.dom.Document;
26
27 import org.springframework.util.StringUtils;
28 import org.springframework.xml.transform.TraxUtils;
29
30 /**
31 * Utility class that determines the last modified date of a given {@link Source}.
32 *
33 * @author Arjen Poutsma
34 * @since 1.5.3
35 */
36 class LastModifiedHelper {
37
38 private LastModifiedHelper() {
39 }
40
41 /**
42 * Returns the last modified date of the given {@link Source}.
43 *
44 * @param source the source
45 * @return the last modified date, as a long
46 */
47 static long getLastModified(Source source) {
48 if (source instanceof DOMSource) {
49 Document document = TraxUtils.getDocument((DOMSource) source);
50 return document != null ? getLastModified(document.getDocumentURI()) : -1;
51 }
52 else {
53 return getLastModified(source.getSystemId());
54 }
55 }
56
57 private static long getLastModified(String systemId) {
58 if (StringUtils.hasText(systemId)) {
59 try {
60 URI systemIdUri = new URI(systemId);
61 if ("file".equals(systemIdUri.getScheme())) {
62 File documentFile = new File(systemIdUri);
63 if (documentFile.exists()) {
64 return documentFile.lastModified();
65 }
66 }
67 }
68 catch (URISyntaxException e) {
69 // ignore
70 }
71 }
72 return -1;
73 }
74
75 }