01: /*
02: * $Id: ReflectorLoader.java 4542 2006-12-21 19:01:02Z blackdrag $
03: *
04: * Copyright 2003 (C) Jochen Theodorou. All Rights Reserved.
05: *
06: * Redistribution and use of this software and associated documentation
07: * ("Software"), with or without modification, are permitted provided that the
08: * following conditions are met: 1. Redistributions of source code must retain
09: * copyright statements and notices. Redistributions must also contain a copy
10: * of this document. 2. Redistributions in binary form must reproduce the above
11: * copyright notice, this list of conditions and the following disclaimer in
12: * the documentation and/or other materials provided with the distribution. 3.
13: * The name "groovy" must not be used to endorse or promote products derived
14: * from this Software without prior written permission of The Codehaus. For
15: * written permission, please contact info@codehaus.org. 4. Products derived
16: * from this Software may not be called "groovy" nor may "groovy" appear in
17: * their names without prior written permission of The Codehaus. "groovy" is a
18: * registered trademark of The Codehaus. 5. Due credit should be given to The
19: * Codehaus - http://groovy.codehaus.org/
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
22: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24: * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
25: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28: * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
31: * DAMAGE.
32: *
33: */
34: package org.codehaus.groovy.runtime;
35:
36: import java.security.ProtectionDomain;
37: import java.util.HashMap;
38:
39: /**
40: * Reflector creation helper. This class is used to define the Refloctor classes.
41: * For each ClassLoader such a Loader will be created by the MetaClass.
42: * The only special about this loader is, that it knows the class Reflector,
43: * which is the base class of all runtime created Reflectors.
44: *
45: * @author <a href="mailto:blackdrag@gmx.org">Jochen Theodorou</a>
46: * @version $Revision: 4542 $
47: */
48: public class ReflectorLoader extends ClassLoader {
49: private HashMap loadedClasses = new HashMap();
50:
51: /**
52: * returns the Reflector class.
53: *
54: * @return the Reflector class if the name matches
55: * @throws ClassNotFoundException if the name is not matching Reflector
56: * @see Reflector
57: */
58: protected Class findClass(String name)
59: throws ClassNotFoundException {
60: if (delegatationLoader == null)
61: return super .loadClass(name);
62: return delegatationLoader.loadClass(name);
63: }
64:
65: /**
66: * helper method to define Reflector classes
67: * @param name of the Reflector
68: * @param bytecode the bytecode
69: * @param domain the protection domain
70: * @return the generated class
71: */
72: public Class defineClass(String name, byte[] bytecode,
73: ProtectionDomain domain) {
74: Class c = defineClass(name, bytecode, 0, bytecode.length,
75: domain);
76: synchronized (loadedClasses) {
77: loadedClasses.put(name, c);
78: }
79: resolveClass(c);
80: return c;
81: }
82:
83: /**
84: * creates a RelfectorLoader.
85: * @param parent the parent loader. This should never be null!
86: */
87: public ReflectorLoader(ClassLoader parent) {
88: super (parent);
89: delegatationLoader = getClass().getClassLoader();
90: }
91:
92: public Class getLoadedClass(String name) {
93: synchronized (loadedClasses) {
94: return (Class) loadedClasses.get(name);
95: }
96: }
97:
98: private ClassLoader delegatationLoader;
99: }
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