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41  * Copyright 2005 (C) The OpenEJB Group. All Rights Reserved.
42  *
43  * $Id: BasicURLClassPath.java 1997 2005-07-12 23:51:17Z dblevins $
44  */
45
46 package org.openejb.loader;
47
48 import java.io.File JavaDoc;
49 import java.net.URL JavaDoc;
50 import java.net.URLClassLoader JavaDoc;
51 import java.security.AccessController JavaDoc;
52 import java.security.PrivilegedAction JavaDoc;
53
54 /**
55  * @version $Revision: 1997 $ $Date: 2005-07-12 16:51:17 -0700 (Tue, 12 Jul 2005) $
56  */
57 public abstract class BasicURLClassPath implements ClassPath {
58     public static ClassLoader JavaDoc getContextClassLoader() {
59         return (ClassLoader JavaDoc) java.security.AccessController.doPrivileged(new java.security.PrivilegedAction JavaDoc() {
60             public Object JavaDoc run() {
61                 return Thread.currentThread().getContextClassLoader();
62             }
63         });
64     }
65
66     private java.lang.reflect.Field JavaDoc ucpField;
67
68     protected void addJarToPath(final URL JavaDoc jar, final URLClassLoader JavaDoc loader) throws Exception JavaDoc {
69         this.getURLClassPath(loader).addURL(jar);
70     }
71
72     protected void addJarsToPath(final File JavaDoc dir, final URLClassLoader JavaDoc loader) throws Exception JavaDoc {
73         if (dir == null || !dir.exists()) return;
74         //System.out.println("DIR "+dir);
75 // Get the list of jars and zips
76 String JavaDoc[] jarNames = dir.list(new java.io.FilenameFilter JavaDoc() {
77             public boolean accept(File JavaDoc dir, String JavaDoc name) {
78                 //System.out.println("FILE "+name);
79 return (name.endsWith(".jar") || name.endsWith(".zip"));
80             }
81         });
82
83         // Create URLs from them
84 final URL JavaDoc[] jars = new URL JavaDoc[jarNames.length];
85         for (int j = 0; j < jarNames.length; j++) {
86             jars[j] = new File JavaDoc(dir, jarNames[j]).toURL();
87         }
88
89         sun.misc.URLClassPath path = getURLClassPath(loader);
90         for (int i = 0; i < jars.length; i++) {
91             //System.out.println("URL "+jars[i]);
92 path.addURL(jars[i]);
93         }
94     }
95
96     protected sun.misc.URLClassPath getURLClassPath(URLClassLoader JavaDoc loader) throws Exception JavaDoc {
97         return (sun.misc.URLClassPath) getUcpField().get(loader);
98     }
99
100     private java.lang.reflect.Field JavaDoc getUcpField() throws Exception JavaDoc {
101         if (ucpField == null) {
102             // Add them to the URLClassLoader's classpath
103 ucpField = (java.lang.reflect.Field JavaDoc) AccessController.doPrivileged(new PrivilegedAction JavaDoc() {
104                 public Object JavaDoc run() {
105                     java.lang.reflect.Field JavaDoc ucp = null;
106                     try {
107                         ucp = URLClassLoader JavaDoc.class.getDeclaredField("ucp");
108                         ucp.setAccessible(true);
109                     } catch (Exception JavaDoc e2) {
110                         e2.printStackTrace();
111                     }
112                     return ucp;
113                 }
114             });
115         }
116
117         return ucpField;
118     }
119
120 }
121
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