1 /*
2 * $Id: ReflectorLoader.java 4542 2006-12-21 19:01:02Z blackdrag $
3 *
4 * Copyright 2003 (C) Jochen Theodorou. All Rights Reserved.
5 *
6 * Redistribution and use of this software and associated documentation
7 * ("Software"), with or without modification, are permitted provided that the
8 * following conditions are met: 1. Redistributions of source code must retain
9 * 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) throws ClassNotFoundException {
59 if (delegatationLoader==null) return super.loadClass(name);
60 return delegatationLoader.loadClass(name);
61 }
62
63 /***
64 * helper method to define Reflector classes
65 * @param name of the Reflector
66 * @param bytecode the bytecode
67 * @param domain the protection domain
68 * @return the generated class
69 */
70 public Class defineClass(String name, byte[] bytecode, ProtectionDomain domain) {
71 Class c = defineClass(name, bytecode, 0, bytecode.length, domain);
72 synchronized(loadedClasses) { loadedClasses.put(name,c); }
73 resolveClass(c);
74 return c;
75 }
76
77 /***
78 * creates a RelfectorLoader.
79 * @param parent the parent loader. This should never be null!
80 */
81 public ReflectorLoader(ClassLoader parent) {
82 super(parent);
83 delegatationLoader = getClass().getClassLoader();
84 }
85
86 public Class getLoadedClass(String name) {
87 synchronized (loadedClasses) {
88 return (Class)loadedClasses.get(name);
89 }
90 }
91
92 private ClassLoader delegatationLoader;
93 }