01: /*
02: * Copyright 2002-2005 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: }
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