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Java > Open Source Codes > org > springframework > ui > context > HierarchicalThemeSource


1 /*
2  * Copyright 2002-2005 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
17 package org.springframework.ui.context;
18
19 /**
20  * Sub-interface of ThemeSource to be implemented by objects that
21  * can resolve theme messages hierarchically.
22  *
23  * @author Jean-Pierre Pawlak
24  * @author Juergen Hoeller
25  */
26 public interface HierarchicalThemeSource extends ThemeSource {
27
28     /**
29      * Set the parent that will be used to try to resolve theme messages
30      * that this object can't resolve.
31      * @param parent the parent ThemeSource that will be used to
32      * resolve messages that this object can't resolve.
33      * May be <code>null</code>, in which case no further resolution is possible.
34      */
35     void setParentThemeSource(ThemeSource parent);
36
37     /**
38      * Return the parent of this ThemeSource, or <code>null</code> if none.
39      */
40     ThemeSource getParentThemeSource();
41
42 }
43
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