01: /*****************************************************************************
02: * *
03: * This file is part of the BeanShell Java Scripting distribution. *
04: * Documentation and updates may be found at http://www.beanshell.org/ *
05: * *
06: * Sun Public License Notice: *
07: * *
08: * The contents of this file are subject to the Sun Public License Version *
09: * 1.0 (the "License"); you may not use this file except in compliance with *
10: * the License. A copy of the License is available at http://www.sun.com *
11: * *
12: * The Original Code is BeanShell. The Initial Developer of the Original *
13: * Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
14: * (C) 2000. All Rights Reserved. *
15: * *
16: * GNU Public License Notice: *
17: * *
18: * Alternatively, the contents of this file may be used under the terms of *
19: * the GNU Lesser General Public License (the "LGPL"), in which case the *
20: * provisions of LGPL are applicable instead of those above. If you wish to *
21: * allow use of your version of this file only under the terms of the LGPL *
22: * and not to allow others to use your version of this file under the SPL, *
23: * indicate your decision by deleting the provisions above and replace *
24: * them with the notice and other provisions required by the LGPL. If you *
25: * do not delete the provisions above, a recipient may use your version of *
26: * this file under either the SPL or the LGPL. *
27: * *
28: * Patrick Niemeyer (pat@pat.net) *
29: * Author of Learning Java, O'Reilly & Associates *
30: * http://www.pat.net/~pat/ *
31: * *
32: *****************************************************************************/package bsh.classpath;
33:
34: import java.io.*;
35: import java.io.File;
36: import java.util.*;
37: import java.awt.*;
38: import bsh.BshClassManager;
39: import bsh.classpath.BshClassPath.ClassSource;
40: import bsh.classpath.BshClassPath.DirClassSource;
41: import bsh.classpath.BshClassPath.GeneratedClassSource;
42:
43: /**
44: A classloader which can load one or more classes from specified sources.
45: Because the classes are loaded via a single classloader they change as a
46: group and any versioning cross dependencies can be managed.
47: */
48: public class DiscreteFilesClassLoader extends BshClassLoader {
49: /**
50: Map of class sources which also implies our coverage space.
51: */
52: ClassSourceMap map;
53:
54: public static class ClassSourceMap extends HashMap {
55: public void put(String name, ClassSource source) {
56: super .put(name, source);
57: }
58:
59: public ClassSource get(String name) {
60: return (ClassSource) super .get(name);
61: }
62: }
63:
64: public DiscreteFilesClassLoader(BshClassManager classManager,
65: ClassSourceMap map) {
66: super (classManager);
67: this .map = map;
68: }
69:
70: /**
71: */
72: public Class findClass(String name) throws ClassNotFoundException {
73: // Load it if it's one of our classes
74: ClassSource source = map.get(name);
75:
76: if (source != null) {
77: byte[] code = source.getCode(name);
78: return defineClass(name, code, 0, code.length);
79: } else
80: // Let superclass BshClassLoader (URLClassLoader) findClass try
81: // to find the class...
82: return super .findClass(name);
83: }
84:
85: public String toString() {
86: return super .toString() + "for files: " + map;
87: }
88:
89: }
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