| ServletContextUtil.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.kernel.servlet;
24
25 import com.liferay.portal.kernel.util.Http;
26 import com.liferay.portal.kernel.util.StringPool;
27
28 import java.io.File;
29
30 import java.util.Set;
31
32 import javax.servlet.ServletContext;
33
34 /**
35 * <a href="ServletContextUtil.java.html"><b><i>View Source</i></b></a>
36 *
37 * @author Brian Wing Shun Chan
38 *
39 */
40 public class ServletContextUtil {
41
42 public static long getLastModified(ServletContext servletContext) {
43 return getLastModified(servletContext, StringPool.SLASH);
44 }
45
46 public static long getLastModified(
47 ServletContext servletContext, String resourcePath) {
48
49 return getLastModified(servletContext, resourcePath, false);
50 }
51
52 public static long getLastModified(
53 ServletContext servletContext, String resourcePath, boolean cache) {
54
55 if (resourcePath.startsWith(Http.HTTP) ||
56 resourcePath.startsWith(Http.HTTPS)) {
57
58 int pos = resourcePath.indexOf(Http.PROTOCOL_DELIMITER);
59
60 resourcePath = resourcePath.substring(pos + 3);
61 }
62
63 int pos = resourcePath.indexOf(StringPool.SLASH);
64
65 if (pos != -1) {
66 resourcePath = resourcePath.substring(pos);
67 }
68
69 if (cache) {
70 Long lastModified = (Long)servletContext.getAttribute(
71 ServletContextUtil.class.getName() + StringPool.PERIOD +
72 resourcePath);
73
74 if (lastModified != null) {
75 return lastModified.longValue();
76 }
77 }
78
79 long lastModified = 0;
80
81 Set<String> resourcePaths = servletContext.getResourcePaths(
82 resourcePath);
83
84 if (resourcePaths != null) {
85 for (String curResourcePath : resourcePaths) {
86 if (curResourcePath.endsWith(StringPool.SLASH)) {
87 long curLastModified = getLastModified(
88 servletContext, curResourcePath);
89
90 if (curLastModified > lastModified) {
91 lastModified = curLastModified;
92 }
93 }
94 else {
95 String realPath = servletContext.getRealPath(
96 curResourcePath);
97
98 if (realPath == null) {
99 continue;
100 }
101
102 File file = new File(realPath);
103
104 if (file.lastModified() > lastModified) {
105 lastModified = file.lastModified();
106 }
107 }
108 }
109 }
110
111 if (cache) {
112 servletContext.setAttribute(
113 ServletContextUtil.class.getName() + StringPool.PERIOD +
114 resourcePath,
115 new Long(lastModified));
116 }
117
118 return lastModified;
119 }
120
121 }