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Java > Open Source Codes > org > springframework > webflow > core > collection > AttributeMapBindingListener


1 /*
2  * Copyright 2002-2006 the original author or authors.
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.springframework.webflow.core.collection;
17
18 /**
19  * Causes an object to be notified when it is bound or unbound from
20  * an {@link AttributeMap}.
21  * <p>
22  * Note that this is an optional feature and not all {@link AttributeMap}
23  * implementations support it.
24  *
25  * @see AttributeMap
26  *
27  * @author Ben Hale
28  */
29 public interface AttributeMapBindingListener {
30
31     /**
32      * Called when the implementing instance is bound into an
33      * <code>AttributeMap</code>.
34      * @param event information about the binding event
35      */
36     void valueBound(AttributeMapBindingEvent event);
37
38     /**
39      * Called when the implementing instance is unbound from an
40      * <code>AttributeMap</code>.
41      * @param event information about the unbinding event
42      */
43     void valueUnbound(AttributeMapBindingEvent event);
44 }
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