/*
* 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.ArrayList;
import java.util.List;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.EventPortlet;
import javax.portlet.EventRequest;
import javax.portlet.EventResponse;
import javax.portlet.Portlet;
import javax.portlet.PortletContext;
import javax.portlet.PortletException;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;
import javax.portlet.ResourceServingPortlet;
import javax.portlet.filter.ActionFilter;
import javax.portlet.filter.EventFilter;
import javax.portlet.filter.FilterChain;
import javax.portlet.filter.RenderFilter;
import javax.portlet.filter.ResourceFilter;
import org.apache.pluto.container.om.portlet.Filter;
/**
* A <code>FilterChain</code> is an object provided by the portlet container
* to the developer giving a view into the invocation chain of a
* filtered request for a portlet. Filters use the <code>FilterChain</code>
* to invoke the next filter in the chain, or if the calling filter is the
* last filter in the chain, to invoke the portlet at the end of the chain.
*@since 29/05/2007
*@version 2.0
*/
public class FilterChainImpl implements FilterChain {
private List<Filter> filterList = new ArrayList<Filter>();
private String lifeCycle;
Portlet portlet;
EventPortlet eventPortlet;
ResourceServingPortlet resourceServingPortlet;
ClassLoader loader;
PortletContext portletContext;
int filterListIndex = 0;
public FilterChainImpl(String lifeCycle){
this.lifeCycle = lifeCycle;
}
public void processFilter(EventRequest req, EventResponse res, EventPortlet eventPortlet, PortletContext portletContext) throws IOException, PortletException{
this.eventPortlet = eventPortlet;
this.loader = Thread.currentThread().getContextClassLoader();
this.portletContext = portletContext;
doFilter(req,res);
}
public void processFilter(ResourceRequest req, ResourceResponse res, ResourceServingPortlet resourceServingPortlet, PortletContext portletContext) throws IOException, PortletException{
this.resourceServingPortlet = resourceServingPortlet;
this.loader = Thread.currentThread().getContextClassLoader();
this.portletContext = portletContext;
doFilter(req,res);
}
public void processFilter(ActionRequest req, ActionResponse res, Portlet portlet, PortletContext portletContext) throws IOException, PortletException{
this.portlet = portlet;
this.loader = Thread.currentThread().getContextClassLoader();
this.portletContext = portletContext;
doFilter(req,res);
}
public void processFilter(RenderRequest req, RenderResponse res, Portlet portlet, PortletContext portletContext) throws IOException, PortletException{
this.portlet = portlet;
this.loader = Thread.currentThread().getContextClassLoader();
this.portletContext = portletContext;
doFilter(req, res);
}
public void addFilter(Filter filter){
filterList.add(filter);
}
public void doFilter(ActionRequest request, ActionResponse response) throws IOException, PortletException {
if (filterListIndex <filterList.size()){
Filter filter = filterList.get(filterListIndex);
filterListIndex++;
try {
ActionFilter actionFilter = (ActionFilter) loader.loadClass(filter.getFilterClass()).newInstance();
FilterConfigImpl filterConfig = new FilterConfigImpl(filter.getFilterName(),filter.getInitParams(),portletContext);
actionFilter.init(filterConfig);
actionFilter.doFilter(request, response, this);
actionFilter.destroy();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
else{
portlet.processAction(request, response);
}
}
public void doFilter(EventRequest request, EventResponse response) throws IOException, PortletException {
if (filterListIndex <filterList.size()){
Filter filter = filterList.get(filterListIndex);
filterListIndex++;
try {
EventFilter eventFilter = (EventFilter) loader.loadClass(filter.getFilterClass()).newInstance();
FilterConfigImpl filterConfig = new FilterConfigImpl(filter.getFilterName(),filter.getInitParams(),portletContext);
eventFilter.init(filterConfig);
eventFilter.doFilter(request, response, this);
eventFilter.destroy();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
else{
eventPortlet.processEvent(request, response);
}
}
public void doFilter(RenderRequest request, RenderResponse response) throws IOException, PortletException {
if (filterListIndex <filterList.size()){
Filter filter = filterList.get(filterListIndex);
filterListIndex++;
try {
RenderFilter renderFilter = (RenderFilter) loader.loadClass(filter.getFilterClass()).newInstance();
FilterConfigImpl filterConfig = new FilterConfigImpl(filter.getFilterName(),filter.getInitParams(),portletContext);
renderFilter.init(filterConfig);
renderFilter.doFilter(request, response, this);
renderFilter.destroy();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
else{
portlet.render(request, response);
}
}
public void doFilter(ResourceRequest request, ResourceResponse response) throws IOException, PortletException {
if (filterListIndex <filterList.size()){
Filter filter = filterList.get(filterListIndex);
filterListIndex++;
try {
ResourceFilter resourceFilter = (ResourceFilter) loader.loadClass(filter.getFilterClass()).newInstance();
FilterConfigImpl filterConfig = new FilterConfigImpl(filter.getFilterName(),filter.getInitParams(),portletContext);
resourceFilter.init(filterConfig);
resourceFilter.doFilter(request, response, this);
resourceFilter.destroy();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
else{
resourceServingPortlet.serveResource(request, response);
}
}
}