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Java > Open Source Codes > org > openejb > loader > SystemClassPath


1 /**
2  * Redistribution and use of this software and associated documentation
3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
5  *
6  * 1. Redistributions of source code must retain copyright
7  * statements and notices. Redistributions must also contain a
8  * copy of this document.
9  *
10  * 2. Redistributions in binary form must reproduce the
11  * above copyright notice, this list of conditions and the
12  * following disclaimer in the documentation and/or other
13  * materials provided with the distribution.
14  *
15  * 3. The name "OpenEJB" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of The OpenEJB Group. For written permission,
18  * please contact info@openejb.org.
19  *
20  * 4. Products derived from this Software may not be called "OpenEJB"
21  * nor may "OpenEJB" appear in their names without prior written
22  * permission of The OpenEJB Group. OpenEJB is a registered
23  * trademark of The OpenEJB Group.
24  *
25  * 5. Due credit should be given to the OpenEJB Project
26  * (http://openejb.org/).
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE OPENEJB GROUP AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * THE OPENEJB GROUP OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39  * OF THE POSSIBILITY OF SUCH DAMAGE.
40  *
41  * Copyright 2005 (C) The OpenEJB Group. All Rights Reserved.
42  *
43  * $Id: SystemClassPath.java 1997 2005-07-12 23:51:17Z dblevins $
44  */
45
46 package org.openejb.loader;
47
48 import java.net.URLClassLoader JavaDoc;
49 import java.net.URL JavaDoc;
50 import java.io.File JavaDoc;
51
52 /**
53  * @version $Revision: 1997 $ $Date: 2005-07-12 16:51:17 -0700 (Tue, 12 Jul 2005) $
54  */
55 /*-------------------------------------------------------*/
56 /* System ClassLoader Support */
57 /*-------------------------------------------------------*/
58 public class SystemClassPath extends BasicURLClassPath {
59
60     private URLClassLoader JavaDoc sysLoader;
61
62     public void addJarsToPath(File JavaDoc dir) throws Exception JavaDoc {
63         this.addJarsToPath(dir, getSystemLoader());
64         this.rebuildJavaClassPathVariable();
65     }
66
67     public void addJarToPath(URL JavaDoc jar) throws Exception JavaDoc {
68         //System.out.println("[|] SYSTEM "+jar.toExternalForm());
69 this.addJarToPath(jar, getSystemLoader());
70         this.rebuildJavaClassPathVariable();
71     }
72
73     public ClassLoader JavaDoc getClassLoader() {
74         try {
75             return getSystemLoader();
76         } catch (Exception JavaDoc e) {
77             throw new RuntimeException JavaDoc(e);
78         }
79     }
80
81     private URLClassLoader JavaDoc getSystemLoader() throws Exception JavaDoc {
82         if (sysLoader == null) {
83             sysLoader = (URLClassLoader JavaDoc) ClassLoader.getSystemClassLoader();
84         }
85         return sysLoader;
86     }
87
88     private void rebuildJavaClassPathVariable() throws Exception JavaDoc {
89         sun.misc.URLClassPath cp = getURLClassPath(getSystemLoader());
90         URL JavaDoc[] urls = cp.getURLs();
91         //for (int i=0; i < urls.length; i++){
92 // System.out.println(urls[i].toExternalForm());
93 //}
94 if (urls.length < 1)
95             return;
96
97         StringBuffer JavaDoc path = new StringBuffer JavaDoc(urls.length * 32);
98
99         File JavaDoc s = new File JavaDoc(urls[0].getFile());
100         path.append(s.getPath());
101         //System.out.println(s.getPath());
102
103         for (int i = 1; i < urls.length; i++) {
104             path.append(File.pathSeparator);
105
106             s = new File JavaDoc(urls[i].getFile());
107             //System.out.println(s.getPath());
108 path.append(s.getPath());
109         }
110         try {
111             System.setProperty("java.class.path", path.toString());
112         } catch (Exception JavaDoc e) {
113         }
114     }
115 }
116
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