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Java > Open Source Codes > org > webdocwf > util > loader > OctopusClassLoader


1 /*
2   OctopusClassLoader
3     Copyright (C) 2002-2003 Together
4     This library is free software; you can redistribute it and/or
5     modify it under the terms of the GNU Lesser General Public
6     License as published by the Free Software Foundation; either
7     version 2.1 of the License, or (at your option) any later version.
8     This library is distributed in the hope that it will be useful,
9     but WITHOUT ANY WARRANTY; without even the implied warranty of
10     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11     Lesser General Public License for more details.
12     You should have received a copy of the GNU Lesser General Public
13     License along with this library; if not, write to the Free Software
14     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15  Loader.java
16  Date: 03.03.2003.
17  @version 2.1 alpha
18  @author:
19  Zoran Milakovic zoran@prozone.co.yu
20  */
21
22
23 package org.webdocwf.util.loader;
24
25 import java.io.*;
26 import java.net.*;
27 import java.lang.reflect.*;
28
29 /**
30  *
31  * OctopusClassLoader add files to System Class Loader
32  * @author Zoran Milakovic
33  * @version 1.0
34  */
35 public class OctopusClassLoader {
36
37   private static final Class JavaDoc[] parameters = new Class JavaDoc[] {URL.class};
38
39   /**
40    * This method add file to System class loader
41    * @param s defines the path to file object (string)
42    * @throws IOException
43    */
44   public static void addFile(String JavaDoc s) throws IOException {
45
46     File f = new File(s);
47
48     addFile(f);
49
50   } //end method
51
52   /**
53    * This method add file to System class loader
54    * @param f defines the file object
55    * @throws IOException
56    */
57   public static void addFile(File f) throws IOException {
58
59     addURL(f.toURL());
60
61   } //end method
62
63
64   /**
65    * This method add file to System class loader
66    * @param u defines the url object
67    * @throws IOException
68    */
69   public static void addURL(URL u) throws IOException {
70
71     URLClassLoader sysloader = (URLClassLoader)ClassLoader.getSystemClassLoader();
72
73     Class JavaDoc sysclass = URLClassLoader.class;
74
75     try {
76
77       Method method = sysclass.getDeclaredMethod("addURL", parameters);
78
79       method.setAccessible(true);
80
81       method.invoke(sysloader, new Object JavaDoc[] {u});
82
83     }
84     catch (Throwable JavaDoc t) {
85
86       t.printStackTrace();
87
88       throw new IOException("Error, could not add URL to system classloader");
89
90     } //end try catch
91
92   } //end method
93
94 } //end class
95
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