KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > cocoon > portal > util > DeltaApplicable


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.cocoon.portal.util;
17
18 /**
19  * Interface for functionality of objects to be updated by a delta object.
20  *
21  * @author <a HREF="mailto:bluetkemeier@s-und-n.de">Bj&ouml;rn L&uuml;tkemeier</a>
22  *
23  * @version CVS $Id: DeltaApplicable.java 30932 2004-07-29 17:35:38Z vgritsenko $
24  */
25 public interface DeltaApplicable {
26
27     /**
28      * Applies the specified delta.
29      * @return true if the delta could be successfully applied, false otherwise.
30      * false can be used if object references stored in maps must be replaced
31      * by the caller instead of a delta being applied.
32      * @throws ClassCastException If the object is not of the expected type.
33      */
34     boolean applyDelta(Object JavaDoc object);
35     
36     /**
37      * Checks if a delta has been applied.
38      */
39     boolean deltaApplied();
40 }
41
Popular Tags