/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.myfaces.trinidaddemo.support;
import org.apache.myfaces.trinidaddemo.NavigationHandlerBean;
import org.apache.myfaces.trinidaddemo.ComponentDemoRegistry;
import org.apache.myfaces.trinidaddemo.FeatureDemoRegistry;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.Filter;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.FilterConfig;
import javax.faces.lifecycle.LifecycleFactory;
import javax.faces.lifecycle.Lifecycle;
import javax.faces.FactoryFinder;
import javax.faces.context.FacesContextFactory;
import javax.faces.context.FacesContext;
import java.io.IOException;
import java.util.logging.Logger;
import java.util.logging.Level;
/**
*
*/
public class PrettyUrlFilter implements Filter {
private enum TYPES{
component,
feature
}
private static final Logger _LOG = Logger.getLogger(PrettyUrlFilter.class.getName());
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
String requestURI = getRequestURI(request);
FacesContext fc = getFacesContext(request, response);
NavigationHandlerBean navigationHandler = (NavigationHandlerBean) fc.getApplication().getELResolver().getValue(fc.getELContext(), null, "navigationHandler");
if (getDemoType(requestURI).equals(TYPES.component)){
IComponentVariantDemo componentVariantDemo = getComponentVariantDemo(requestURI);
navigationHandler.setCurrentComponentVariantDemo(componentVariantDemo);
_LOG.log(Level.INFO,"Forwarding request [" + requestURI + "] to view [" + componentVariantDemo.getEntryPagePath()+"]");
if (!response.isCommitted()) {
request.getRequestDispatcher("/faces"+componentVariantDemo.getEntryPagePath()).forward(request, response);
}
}
if (getDemoType(requestURI).equals(TYPES.feature)){
IFeatureDemo featureDemo = getFeatureDemo(requestURI);
navigationHandler.setCurrentFeatureDemo(featureDemo);
_LOG.log(Level.INFO,"Forwarding request [" + requestURI + "] to view [" + featureDemo.getPagePath()+"]");
if (!response.isCommitted()) {
request.getRequestDispatcher("/faces"+featureDemo.getPagePath()).forward(request, response);
}
}
}
/**
* @param request
* @return
*/
private String getRequestURI(final ServletRequest request) {
String requestURI = ((HttpServletRequest) request).getRequestURI();
String contextPath = ((HttpServletRequest) request).getContextPath();
if (requestURI.startsWith(contextPath)) {
requestURI = requestURI.substring(contextPath.length());
}
return requestURI;
}
private TYPES getDemoType(String requestURI) {
String demoType = requestURI.substring(1,requestURI.indexOf("-"));
return TYPES.valueOf(demoType);
}
/**
* @param requestURI
* @return
*/
private IComponentVariantDemo getComponentVariantDemo(String requestURI) {
int idPathIndex = requestURI.lastIndexOf("/");
if (idPathIndex == -1) {
return null;
}
String idPath = requestURI.substring(idPathIndex + 1);
String[] values = idPath.split("-");
ComponentDemoId componentDemoId = ComponentDemoId.valueOf(values[0]);
String variantName = values[1] ;
IComponentDemo componentDemo = ComponentDemoRegistry.getInstance().getComponentDemo(componentDemoId);
IComponentVariantDemo resultingDemo = componentDemo.getVariant(variantName);
return resultingDemo;
}
private IFeatureDemo getFeatureDemo(String requestURI) {
int idPathIndex = requestURI.lastIndexOf("/");
if (idPathIndex == -1) {
return null;
}
String idPath = requestURI.substring(idPathIndex+1);
FeatureDemoId featureDemoId = FeatureDemoId.valueOf(idPath);
return FeatureDemoRegistry.getInstance().getFeatureDemo(featureDemoId);
}
/**
* @param request
* @param response
* @return
*/
private FacesContext getFacesContext(final ServletRequest request, final ServletResponse response) {
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null) {
return facesContext;
}
FacesContextFactory contextFactory = (FacesContextFactory) FactoryFinder
.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);
LifecycleFactory lifecycleFactory = (LifecycleFactory) FactoryFinder
.getFactory(FactoryFinder.LIFECYCLE_FACTORY);
Lifecycle lifecycle = lifecycleFactory.getLifecycle(LifecycleFactory.DEFAULT_LIFECYCLE);
ServletContext servletContext = ((HttpServletRequest) request).getSession().getServletContext();
facesContext = contextFactory.getFacesContext(servletContext, request, response, lifecycle);
return facesContext;
}
public void init(FilterConfig filterConfig) throws ServletException {}
public void destroy() {}
}