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1 /*
2 * Title: FileDecoratorMapper
3 * Description:
4 *
5 * This software is published under the terms of the OpenSymphony Software
6 * License version 1.1, of which a copy has been included with this
7 * distribution in the LICENSE.txt file.
8 */
9
10 package com.opensymphony.module.sitemesh.mapper;
11
12 import com.opensymphony.module.sitemesh.Decorator;
13
14 import java.io.File;
15 import java.net.MalformedURLException;
16 import java.net.URL;
17 import javax.servlet.http.HttpServletRequest;
18
19 /**
20 * The FileDecoratorMapper will treat the name of the decorator as a file-name to use
21 * (in the context of the web-app).
22 *
23 * @author <a href="joe@truemesh.com">Joe Walnes</a>
24 * @author <a href="mike@atlassian.com">Mike Cannon-Brookes</a>
25 * @version $Revision: 1.1 $
26 *
27 * @see com.opensymphony.module.sitemesh.DecoratorMapper
28 * @see com.opensymphony.module.sitemesh.mapper.DefaultDecorator
29 */
30 public class FileDecoratorMapper extends AbstractDecoratorMapper {
31 private static boolean pathNotAvailable = false;
32
33 public Decorator getNamedDecorator(HttpServletRequest req, String name) {
34 if (pathNotAvailable || name == null) {
35 return super.getNamedDecorator(req, name);
36 }
37
38 URL resourcePath = null;
39
40 // try to locate the resource (might be an unexpanded WAR)
41 try {
42 resourcePath = config.getServletContext().getResource('/' + name);
43 }
44 catch (MalformedURLException e) {
45 e.printStackTrace();
46 return super.getNamedDecorator(req, name);
47 }
48
49 String filePath = config.getServletContext().getRealPath(name);
50
51 if (filePath == null && resourcePath == null) {
52 pathNotAvailable = true;
53 return super.getNamedDecorator(req, name);
54 }
55 else if (filePath != null) { // do we really need this disk file check?!
56 File file = new File(filePath);
57
58 if (file.exists() && file.canRead()) {
59 // if filename exists with name of supplied decorator, return Decorator
60 return new DefaultDecorator(name, name, null);
61 }
62 else {
63 // otherwise delegate to parent mapper.
64 return super.getNamedDecorator(req, name);
65 }
66 }
67 else {
68 // file path is null and resource path is not null - can't check file on disk
69 return new DefaultDecorator(name, name, null);
70 }
71 }
72 }