/*
* Copyright (C) 2003-2010 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.exoplatform.web.filter;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.exoplatform.container.PortalContainer;
/**
* A filter enables resource overriding via extension mechanism.
*
* @author <a href="mailto:hoang281283@gmail.com">Minh Hoang TO</a>
* Sep 8, 2010
*/
public class RedefinableResourceFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest upcastedRequest = (HttpServletRequest)request;
PortalContainer portalContainer = PortalContainer.getInstance();
ServletContext mergedContext = portalContainer.getPortalContext();
String path = upcastedRequest.getRequestURI();
String ctx = upcastedRequest.getContextPath();
if(ctx != null && ctx.length() > 0 && path.startsWith(ctx))
{
path = path.substring(ctx.length());
}
mergedContext.getRequestDispatcher(path).include(request, response);
}
}