filtermanagerimpl.java

portal越来越流行了

/*
 * 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.pluto.driver.services.container;

import java.io.IOException;
import java.util.List;

import javax.portlet.EventPortlet;
import javax.portlet.Portlet;
import javax.portlet.PortletContext;
import javax.portlet.PortletException;
import javax.portlet.PortletRequest;
import javax.portlet.PortletResponse;
import javax.portlet.ResourceServingPortlet;

import org.apache.pluto.om.portlet.Filter;
import org.apache.pluto.om.portlet.FilterMapping;
import org.apache.pluto.om.portlet.PortletApplicationDefinition;
import org.apache.pluto.spi.FilterManager;

/**
 * Manage the initialization and doFilter {@link FilterChainImpl} for the filter which are
 * declareted in the deployment descriptor.
 * @since 05/29/2007
 * @version 2.0
 */
public class FilterManagerImpl implements FilterManager{
	private FilterChainImpl filterchain;
	private PortletApplicationDefinition portletApp;
	private String portletName;
	private String lifeCycle;
	
	public FilterManagerImpl(PortletApplicationDefinition portletApp, String portletName, String lifeCycle){
		this.portletApp = portletApp;
		this.portletName =  portletName;
		this.lifeCycle = lifeCycle;
		filterchain = new FilterChainImpl(lifeCycle);
		initFilterChain();
	}
	
	public static FilterManager getFilterManager(PortletApplicationDefinition portletApp, String portletName, String lifeCycle){
		return new FilterManagerImpl(portletApp,portletName,lifeCycle);
	}
	
	private void initFilterChain(){
		List<? extends FilterMapping> filterMappingList = portletApp.getFilterMappings();
		if (filterMappingList!= null){
			for (FilterMapping filterMapping : filterMappingList) {
				if (isFilter(filterMapping, portletName)){
					//the filter is specified for the portlet, check the filter for the lifecycle
					List<? extends Filter> filterList = portletApp.getFilters();
					for (Filter filter : filterList) {
						//search for the filter in the filter
						if (filter.getFilterName().equals(filterMapping.getFilterName())){
							//check the lifecycle
							if (isLifeCycle(filter, lifeCycle)){
								//the filter match to the portlet and has the specified lifecycle -> add to chain
								filterchain.addFilter(filter);
							}
						}
					}
				}
			}
		}	
	}
	
	public void processFilter(PortletRequest req, PortletResponse res, ClassLoader loader, EventPortlet eventPortlet,PortletContext portletContext)throws PortletException, IOException{
		filterchain.processFilter(req, res, loader, eventPortlet, portletContext);
	}
	
	public void processFilter(PortletRequest req, PortletResponse res, ClassLoader loader, ResourceServingPortlet resourceServingPortlet,PortletContext portletContext)throws PortletException, IOException{
		filterchain.processFilter(req, res, loader, resourceServingPortlet, portletContext);
	}
	
	public void processFilter(PortletRequest req, PortletResponse res, ClassLoader loader, Portlet portlet,PortletContext portletContext) throws PortletException, IOException{
		filterchain.processFilter(req, res, loader, portlet, portletContext);
	}
	
	private boolean isLifeCycle(Filter filter, String lifeCycle){
		List <String> lifeCyclesList = filter.getLifecycles();
		for (String string : lifeCyclesList) {
			if (string.equals(lifeCycle))
				return true;
		}
		return false;
	}
	
	private boolean isFilter(FilterMapping filterMapping,String portletName){
		List <String> portletNamesList = filterMapping.getPortletNames();
		for (String portletNameFromFilterList : portletNamesList) {
			if (portletNameFromFilterList.endsWith("*")){
				if (portletNameFromFilterList.length()==1){
					//if name contains only *
					return true;
				}
				portletNameFromFilterList = portletNameFromFilterList.substring(0, portletNameFromFilterList.length()-1);
				if (portletName.length()>= portletNameFromFilterList.length()){
					if (portletName.substring(0, portletNameFromFilterList.length()).equals(portletNameFromFilterList)){
						return true;
					}
				}
			}
			else if (portletNameFromFilterList.equals(portletName))
				return true;
		}
		return false;
	}
	

}