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Java > Open Source Codes > com > quadcap > http > servlets > jsp > JspClassLoader


1 package com.quadcap.http.servlets.jsp;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.util.Hashtable JavaDoc;
42
43 import java.io.File JavaDoc;
44 import java.io.FileInputStream JavaDoc;
45 import java.io.IOException JavaDoc;
46
47 import com.quadcap.util.Debug;
48
49 /**
50  * This class implements a JSP class loader
51  *
52  * @author Stan Bailes
53  */
54 public class JspClassLoader extends ClassLoader JavaDoc {
55     File JavaDoc root;
56
57     public JspClassLoader(ClassLoader JavaDoc parent, File JavaDoc root) {
58         super(parent);
59         this.root = root;
60     }
61
62     public Class JavaDoc loadClass(String JavaDoc name) throws ClassNotFoundException JavaDoc {
63     return loadClass(name, true);
64     }
65
66 //- //#ifdef JDK11
67 //- Hashtable cache = new Hashtable();
68 //-
69 //- public Class loadClass(String name, boolean resolve)
70 //- throws ClassNotFoundException
71 //- {
72 //- Class c = (Class)cache.get(name);
73 //- if (c == null) {
74 //- c = findClass(name);
75 //- cache.put(name, c);
76 //- }
77 //- if (resolve)
78 //- resolveClass(c);
79 //- return c;
80 //- }
81 //-
82 //#endif
83
84     public Class JavaDoc findClass(String JavaDoc name) throws ClassNotFoundException JavaDoc {
85         //#ifdef DEBUG
86 if (Trace.level() > 1) {
87             Debug.println("JspClassLoader.findClass(" + name + ")");
88         }
89         //#endif
90 byte[] b = loadClassData(name);
91         return defineClass(name, b, 0, b.length);
92     }
93
94     private byte[] loadClassData(String JavaDoc name) throws ClassNotFoundException JavaDoc {
95         try {
96             String JavaDoc fileName = name.replace('.', File.separatorChar);
97             File JavaDoc classFile = new File JavaDoc(root, fileName + ".class");
98             int len = (int)(classFile.length());
99             byte[] b = new byte[len];
100             FileInputStream JavaDoc f = new FileInputStream JavaDoc(classFile);
101             f.read(b);
102             f.close();
103             return b;
104         } catch (IOException JavaDoc e) {
105             throw new ClassNotFoundException JavaDoc("error loading class: " +
106                          e.toString());
107         }
108     }
109
110 }
111
112
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