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Java > Open Source Codes > org > codehaus > aspectwerkz > joinpoint > JoinPoint


1 /**************************************************************************************
2  * Copyright (c) Jonas Bonér, Alexandre Vasseur. All rights reserved. *
3  * http://aspectwerkz.codehaus.org *
4  * ---------------------------------------------------------------------------------- *
5  * The software in this package is published under the terms of the LGPL license *
6  * a copy of which has been included with this distribution in the license.txt file. *
7  **************************************************************************************/

8 package org.codehaus.aspectwerkz.joinpoint;
9
10 /**
11  * Implements the join point concept, e.g. defines a well defined point in the program flow.
12  * <p/>
13  * Provides access to runtime type information (RTTI), is therefore significantly <b>slower</b>
14  * than the usage of the {@link org.codehaus.aspectwerkz.joinpoint.StaticJoinPoint} interface.
15  *
16  * @author <a HREF="mailto:jboner@codehaus.org">Jonas Bonér </a>
17  */

18 public interface JoinPoint extends StaticJoinPoint {
19
20     /**
21      * Returns the callee instance.
22      *
23      * @return the callee instance
24      */

25     Object JavaDoc getCallee();
26
27     /**
28      * Returns the caller instance.
29      *
30      * @return the caller instance
31      */

32     Object JavaDoc getCaller();
33
34     /**
35      * Returns the 'this' instance (the one currently executing).
36      *
37      * @return 'this'
38      */

39     Object JavaDoc getThis();
40
41     /**
42      * Returns the target instance. If the join point is executing in a static context it returns null.
43      *
44      * @return the target instance
45      */

46     Object JavaDoc getTarget();
47
48     /**
49      * Returns the JoinPoint RTTI
50      *
51      * @return the Rtti
52      */

53     Rtti getRtti();
54 }
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