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 /***
57 * Provides a method to map from callback types (as defined per-method by a {@link CallbackFilter})
58 * to a particular {@link Callback} implementation. The callback type constants are defined here as well.
59 * In practice it should be rare to need to implement this interface. See {@link SimpleCallbacks} for
60 * a simple implementation.
61 */
62 public interface Callbacks
63 {
64 /***
65 * No-op callback type. Does not generate an intercepted method
66 * in the subclass--the "super" method will be called directly instead.
67 * No associated <code>Callback</code> implementation.
68 */
69 public static final int NO_OP = 0;
70
71 /***
72 * Generic interceptor callback type. <code>Callback</code> implementation is {@link MethodInterceptor}.
73 * @see MethodInterceptor
74 */
75 public static final int INTERCEPT = 1;
76
77 /***
78 * Special callback type used by the {@link Proxy} class for
79 * <code>java.lang.reflect.Proxy</code> compatibility. You probably don't
80 * want to use this directly. <code>Callback</code> implementation is {@link InvocationHandler}.
81 * @see Proxy
82 * @see InvocationHandler
83 */
84 public static final int JDK_PROXY = 2;
85
86 /***
87 * Callback type used to load an implementation as soon as the first method is called,
88 * <code>Callback</code> implementation is {@link LazyLoader}.
89 * @see LazyLoader
90 */
91 public static final int LAZY_LOAD = 3;
92
93 /***
94 * Callback type used to load an implementation for every single method invocation.
95 * <code>Callback</code> implementation is {@link Dispatcher}.
96 * @see Dispatcher
97 */
98 public static final int DISPATCH = 4;
99
100 static final int MAX_VALUE = 4; // should be set to current max index
101
102 /***
103 * Return the actual <code>Callback</code> implementation for the specified callback type.
104 * @param type the callback type
105 * @return the callback implementation
106 */
107 Callback get(int type);
108 }
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