/*
* Copyright 2004-2009 Luciano Vernaschi
*
* This file is part of MeshCMS.
*
* MeshCMS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MeshCMS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MeshCMS. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file is nearly identical to the SessionDecoratorMapper available in the
* SiteMesh CVS and written by Ricardo Lecheta. It has been kept out of the
* SiteMesh package to point out that this file is not part of the current
* SiteMesh official release.
*/
package org.meshcms.core;
import com.opensymphony.module.sitemesh.Config;
import com.opensymphony.module.sitemesh.Decorator;
import com.opensymphony.module.sitemesh.DecoratorMapper;
import com.opensymphony.module.sitemesh.Page;
import com.opensymphony.module.sitemesh.mapper.AbstractDecoratorMapper;
import java.util.Properties;
import javax.servlet.http.HttpServletRequest;
/**
* <p>Will look at a request attribute to find the name of an appropriate decorator to use. If the
* request attribute is not present, the mapper will not do anything and allow the next mapper in the chain
* to select a decorator.</p>
*
* <p>By default, it will look at the 'decorator' session attribute, however this can be overriden by
* configuring the mapper with a 'decorator.parameter' property.</p>
*
* @author Ricardo Lecheta
*/
public class RequestDecoratorMapper extends AbstractDecoratorMapper {
private String decoratorParameter = null;
public void init(Config config, Properties properties, DecoratorMapper parent) throws InstantiationException {
super.init(config, properties, parent);
decoratorParameter = properties.getProperty("decorator.parameter", "decorator");
}
public Decorator getDecorator(HttpServletRequest request, Page page) {
Decorator result = null;
String decorator = (String) request.getAttribute(decoratorParameter);
if (decorator != null) {
result = getNamedDecorator(request, decorator);
}
return result == null ? super.getDecorator(request, page) : result;
}
}