PageRenderTime 68ms CodeModel.GetById 63ms app.highlight 3ms RepoModel.GetById 1ms app.codeStats 0ms

/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/bsh/classpath/DiscreteFilesClassLoader.java

#
Java | 91 lines | 36 code | 10 blank | 45 comment | 2 complexity | a25b4747bf4afd4d825634273133b8d9 MD5 | raw file
 1/*****************************************************************************
 2 *                                                                           *
 3 *  This file is part of the BeanShell Java Scripting distribution.          *
 4 *  Documentation and updates may be found at http://www.beanshell.org/      *
 5 *                                                                           *
 6 *  Sun Public License Notice:                                               *
 7 *                                                                           *
 8 *  The contents of this file are subject to the Sun Public License Version  *
 9 *  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 *****************************************************************************/
33
34package org.gjt.sp.jedit.bsh.classpath;
35
36import java.util.*;
37
38import org.gjt.sp.jedit.bsh.BshClassManager;
39import org.gjt.sp.jedit.bsh.classpath.BshClassPath.ClassSource;
40
41/**
42	A classloader which can load one or more classes from specified sources.
43	Because the classes are loaded via a single classloader they change as a
44	group and any versioning cross dependencies can be managed.
45*/
46public class DiscreteFilesClassLoader extends BshClassLoader 
47{
48	/**
49		Map of class sources which also implies our coverage space.
50	*/
51	ClassSourceMap map;
52
53	public static class ClassSourceMap extends HashMap 
54	{
55		public void put( String name, ClassSource source ) {
56			super.put( name, source );
57		}
58		public ClassSource get( String name ) {
59			return (ClassSource)super.get( name );
60		}
61	}
62	
63	public DiscreteFilesClassLoader( 
64		BshClassManager classManager, ClassSourceMap map ) 
65	{
66		super( classManager );
67		this.map = map;
68	}
69
70	/**
71	*/
72	public Class findClass( String name ) throws ClassNotFoundException 
73	{
74		// Load it if it's one of our classes
75		ClassSource source = map.get( name );
76
77		if ( source != null )
78		{
79			byte [] code = source.getCode( name );
80			return defineClass( name, code, 0, code.length );
81		} else
82			// Let superclass BshClassLoader (URLClassLoader) findClass try 
83			// to find the class...
84			return super.findClass( name );
85	}
86
87	public String toString() {
88		return super.toString() + "for files: "+map;
89	}
90
91}