01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: *
29: * This software is Open Source Initiative approved Open Source Software.
30: * Open Source Initative Approved is a trademark of the Open Source Initiative.
31: *
32: * This file is part of DrJava. Download the current version of this project
33: * from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/
34: *
35: * END_COPYRIGHT_BLOCK*/
36:
37: package edu.rice.cs.drjava.model;
38:
39: import java.lang.ClassLoader;
40: import java.net.URL;
41:
42: import edu.rice.cs.drjava.model.repl.WrapperClassLoader;
43:
44: public class BrainClassLoader extends ClassLoader {
45:
46: ClassLoader projectCL;
47: ClassLoader buildCL;
48: ClassLoader projectFilesCL;
49: ClassLoader externalFilesCL;
50: ClassLoader extraCL;
51: ClassLoader systemCL;
52:
53: public BrainClassLoader(ClassLoader p, ClassLoader b,
54: ClassLoader pf, ClassLoader ef, ClassLoader e) {
55: projectCL = p;
56: buildCL = b;
57: projectFilesCL = pf;
58: externalFilesCL = ef;
59: extraCL = e;
60: systemCL = new WrapperClassLoader(this .getClass()
61: .getClassLoader().getSystemClassLoader());
62: }
63:
64: /** Handles getting the resource for loading a class. */
65: public URL getResource(String name) {
66: URL resource = projectCL.getResource(name);
67: if (resource != null)
68: return resource;
69:
70: resource = buildCL.getResource(name);
71: if (resource != null)
72: return resource;
73:
74: resource = projectFilesCL.getResource(name);
75: if (resource != null)
76: return resource;
77:
78: resource = externalFilesCL.getResource(name);
79: if (resource != null)
80: return resource;
81:
82: resource = extraCL.getResource(name);
83: if (resource != null)
84: return resource;
85:
86: resource = systemCL.getResource(name);
87: if (resource != null)
88: return resource;
89:
90: return resource;
91: }
92: }
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