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1 package com.opensymphony.webwork.portlet.util;
2
3 import java.io.IOException  ;
4 import java.io.InputStream ;
5 import java.net.URL ;
6 import java.util.Enumeration ;
7
8 public class ClassLoaderUtils {
9
10 public ClassLoaderUtils() {
11 }
12
13 public static Class loadClass(String className, Class callingClass) throws ClassNotFoundException {
14 try {
15 return Thread.currentThread().getContextClassLoader().loadClass(className);
16 } catch (ClassNotFoundException e) {
17 try {
18 return Class.forName(className);
19 } catch (ClassNotFoundException ex) {
20
21 try {
22 return (com.opensymphony.webwork.portlet.util.ClassLoaderUtils.class).getClassLoader().loadClass(className);
23 } catch (ClassNotFoundException exc) {
24 try {
25 return callingClass.getClassLoader().loadClass(className);
26 } catch (ClassNotFoundException exce) {
27 throw exce;
28 }
29 }
30 }
31 }
32
33 }
34
35 public static URL getResource(String resourceName, Class callingClass) {
36 URL url = null;
37 url = Thread.currentThread().getContextClassLoader().getResource(resourceName);
38 if (url == null)
39 url = (com.opensymphony.webwork.portlet.util.ClassLoaderUtils.class).getClassLoader().getResource(resourceName);
40 if (url == null)
41 url = callingClass.getClassLoader().getResource(resourceName);
42 return url;
43 }
44
45 public static Enumeration getResources(String resourceName, Class callingClass) throws IOException {
46 Enumeration urls = Thread.currentThread().getContextClassLoader().getResources(resourceName);
47 if (urls == null) {
48 urls = (com.opensymphony.webwork.portlet.util.ClassLoaderUtils.class).getClassLoader().getResources(resourceName);
49 if (urls == null)
50 urls = callingClass.getClassLoader().getResources(resourceName);
51 }
52 return urls;
53 }
54
55 public static InputStream getResourceAsStream(String resourceName, Class callingClass) {
56 try {
57 URL url = getResource(resourceName, callingClass);
58 return url == null ? null : url.openStream();
59 } catch (IOException e) {
60 return null;
61 }
62 }
63
64 public static void printClassLoader() {
65 System.out.println("ClassLoaderUtils.printClassLoader");
66 printClassLoader(Thread.currentThread().getContextClassLoader());
67 }
68
69 public static void printClassLoader(ClassLoader cl) {
70 System.out.println("ClassLoaderUtils.printClassLoader(cl = " + cl + ")");
71 if (cl != null)
72 printClassLoader(cl.getParent());
73 }
74 } |
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