/*
* Copyright 2010 Lincoln Baxter, III
*
* 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 com.ocpsoft.pretty.faces.config.servlet;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import javax.faces.webapp.FacesServlet;
import javax.servlet.ServletContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.ocpsoft.common.pattern.WeightedComparator;
import org.ocpsoft.common.services.ServiceLoader;
import org.ocpsoft.common.util.Iterators;
import org.ocpsoft.rewrite.servlet.ServletRegistration;
import org.ocpsoft.rewrite.servlet.spi.ServletRegistrationProvider;
import org.xml.sax.SAXException;
/**
* This class is used to detect the mapping of the {@link FacesServlet}. The new implementation is based on Rewrite's
* {@link ServletRegistrationProvider} SPI. This class should not be removed, because 3rd party frameworks like Seam
* Faces are using it.
*
* @author Lincoln Baxter, III <lincoln@ocpsoft.com>
* @author Christian Kaltepoth
*/
public class WebXmlParser
{
private static final Log log = LogFactory.getLog(WebXmlParser.class);
private static final String FACES_SERVLET = "javax.faces.webapp.FacesServlet";
private String facesMapping = null;
public void parse(final ServletContext context) throws IOException, SAXException
{
List<ServletRegistrationProvider> providers = Iterators.asList(
ServiceLoader.loadTypesafe(ServletRegistrationProvider.class).iterator());
Collections.sort(providers, new WeightedComparator());
for (ServletRegistrationProvider provider : providers) {
List<ServletRegistration> registrations = provider.getServletRegistrations(context);
if (registrations != null) {
for (ServletRegistration s : registrations)
{
if (s.getClassName() != null && s.getClassName().equalsIgnoreCase(FACES_SERVLET))
{
Collection<String> mappings = s.getMappings();
if (!mappings.isEmpty())
{
facesMapping = mappings.iterator().next();
break;
}
}
}
if (facesMapping == null)
{
log.warn("Faces Servlet (javax.faces.webapp.FacesServlet) not found in web context - cannot configure PrettyFaces DynaView");
}
}
}
}
public boolean isFacesPresent()
{
return facesMapping != null;
}
public String getFacesMapping()
{
if (isFacesPresent())
{
return facesMapping;
}
return "";
}
}