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Java > Open Source Codes > org > enhydra > barracuda > core > event > Exceptional


1 /*
2  * Copyright (C) 2003 Christian Cryder [christianc@granitepeaks.com]
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * $Id: Exceptional.java,v 1.5 2004/02/01 05:16:28 christianc Exp $
19  */
20 package org.enhydra.barracuda.core.event;
21
22 import java.io.*;
23 import java.util.*;
24
25 /**
26  * This marker interface indicates an Event must be handled, and if
27  * it's not, the parent event should be dispatched. This is
28  * kind of the opposite meaning of the Polymorphic interface.
29  *
30  * Events should never indicate both Exceptional and Polymorphic
31  * (and can't because both of these interfaces define
32  * describeEventChainingStrategy())
33  */
34 public interface Exceptional {
35     /**
36      * Describe the event chaining stategy. This method really
37      * just serves to ensure that objects cannot implement BOTH
38      * Polymorphic and Exceptional (it's got to be one or the other)
39      *
40      * @return string describing the event chain strategy
41      */
42     public String JavaDoc describeEventChainingStrategy();
43 }
44
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