1 /*
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2002 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 */
54 package net.sf.cglib;
55
56 import java.io.Serializable;
57 import java.lang.reflect.Method;
58 import java.lang.reflect.Member;
59 import net.sf.cglib.core.CodeGenerationException;
60
61 /***
62 * This class is meant to be used as a implementation of
63 * <code>java.lang.reflect.Proxy</code> under JDK 1.2. There are some known
64 * subtle differences:
65 * <ul>
66 * <li>The exceptions returned by invoking <code>getExceptionTypes</code>
67 * on the <code>Method</code> passed to the <code>invoke</code> method
68 * <b>are</b> the exact set that can be thrown without resulting in an
69 * <code>UndeclaredThrowableException</code> being thrown.
70 * <li><code>net.sf.cglib.UndeclaredThrowableException</code> is used instead
71 * of <code>java.lang.reflect.UndeclaredThrowableException</code>.
72 * </ul>
73 *
74 * @version $Id: Proxy.java,v 1.14 2003/09/14 17:44:22 herbyderby Exp $
75 */
76 public class Proxy implements Serializable {
77 protected Proxy(InvocationHandler h) {
78 ((Factory)this).setCallback(Callbacks.JDK_PROXY, h);
79 }
80
81 // private for security of isProxyClass
82 private static class ProxyImpl extends Proxy {
83 protected ProxyImpl(InvocationHandler h) {
84 super(h);
85 }
86 }
87
88 public static InvocationHandler getInvocationHandler(Object proxy) {
89 return (InvocationHandler)((Factory)proxy).getCallback(Callbacks.JDK_PROXY);
90 }
91
92 public static Class getProxyClass(ClassLoader loader, Class[] interfaces) {
93 Enhancer e = new Enhancer();
94 e.setSuperclass(ProxyImpl.class);
95 e.setInterfaces(interfaces);
96 e.setCallbackFilter(new SimpleFilter(Callbacks.JDK_PROXY));
97 return e.createClass();
98 }
99
100 public static boolean isProxyClass(Class cl) {
101 return cl.getSuperclass().equals(ProxyImpl.class);
102 }
103
104 public static Object newProxyInstance(ClassLoader loader, Class[] interfaces, InvocationHandler h) {
105 try {
106 Class clazz = getProxyClass(loader, interfaces);
107 return clazz.getConstructor(new Class[]{ InvocationHandler.class }).newInstance(new Object[]{ h });
108 } catch (RuntimeException e) {
109 throw e;
110 } catch (Exception e) {
111 throw new CodeGenerationException(e);
112 }
113 }
114 }
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