Spring Framework example source code file (DelegatingThemeSource.java)

This example Spring Framework source code file (DelegatingThemeSource.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

delegatingthemesource, delegatingthemesource, hierarchicalthemesource, hierarchicalthemesource, theme, theme, themesource, themesource

The Spring Framework DelegatingThemeSource.java source code

/*
 * Copyright 2002-2005 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.ui.context.support;

import org.springframework.ui.context.HierarchicalThemeSource;
import org.springframework.ui.context.Theme;
import org.springframework.ui.context.ThemeSource;

/**
 * Empty ThemeSource that delegates all calls to the parent ThemeSource.
 * If no parent is available, it simply won't resolve any theme.
 *
 * <p>Used as placeholder by UiApplicationContextUtils, if a context doesn't
 * define its own ThemeSource. Not intended for direct use in applications.
 *
 * @author Juergen Hoeller
 * @since 1.2.4
 * @see UiApplicationContextUtils
 */
public class DelegatingThemeSource implements HierarchicalThemeSource {

	private ThemeSource parentThemeSource;


	public void setParentThemeSource(ThemeSource parentThemeSource) {
		this.parentThemeSource = parentThemeSource;
	}

	public ThemeSource getParentThemeSource() {
		return parentThemeSource;
	}


	public Theme getTheme(String themeName) {
		if (this.parentThemeSource != null) {
			return this.parentThemeSource.getTheme(themeName);
		}
		else {
			return null;
		}
	}

}