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 org.objectweb.asm.Type;
57
58 class CallbackUtils {
59 private CallbackUtils() { }
60
61 private static Class getClass(int type) {
62 switch (type) {
63 case Callbacks.INTERCEPT:
64 return MethodInterceptor.class;
65 case Callbacks.JDK_PROXY:
66 return InvocationHandler.class;
67 case Callbacks.LAZY_LOAD:
68 return LazyLoader.class;
69 case Callbacks.DISPATCH:
70 return Dispatcher.class;
71 default:
72 return null;
73 }
74 }
75
76 static Type getType(int type) {
77 Class c = getClass(type);
78 return (c != null) ? Type.getType(c) : null;
79 }
80
81 static CallbackGenerator getGenerator(int type) {
82 switch (type) {
83 case Callbacks.INTERCEPT:
84 return MethodInterceptorGenerator.INSTANCE;
85 case Callbacks.NO_OP:
86 return NoOpGenerator.INSTANCE;
87 case Callbacks.JDK_PROXY:
88 return InvocationHandlerGenerator.INSTANCE;
89 case Callbacks.LAZY_LOAD:
90 return LazyLoaderGenerator.INSTANCE;
91 case Callbacks.DISPATCH:
92 return DispatcherGenerator.INSTANCE;
93 default:
94 return null;
95 }
96 }
97
98 static int determineType(Callback callback) {
99 int best = Callbacks.NO_OP;
100 for (int i = Callbacks.MAX_VALUE; i >= 0; i--) {
101 Class type = getClass(i);
102 if (type != null && type.isAssignableFrom(callback.getClass())) {
103 if (best != Callbacks.NO_OP) {
104 throw new IllegalStateException("Callback implements more than one interceptor interface--use a CallbackFilter");
105 }
106 best = i;
107 }
108 }
109 return best;
110 }
111 }
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