/*
* Copyright 2010 IT Mill Ltd.
*
* 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.vaadin.terminal.gwt.server;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.Portlet;
import javax.portlet.PortletSession;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.servlet.http.HttpSession;
import com.vaadin.Application;
/**
* @author marc
*/
public class PortletApplicationContext extends WebApplicationContext implements
Serializable {
protected PortletSession portletSession;
protected Map<Application, Set<PortletListener>> portletListeners = new HashMap<Application, Set<PortletListener>>();
protected Map<Portlet, Application> portletToApplication = new HashMap<Portlet, Application>();
PortletApplicationContext() {
}
static public PortletApplicationContext getApplicationContext(
PortletSession session) {
WebApplicationContext cx = (WebApplicationContext) session
.getAttribute(WebApplicationContext.class.getName(),
PortletSession.APPLICATION_SCOPE);
if (cx == null) {
cx = new PortletApplicationContext();
}
if (!(cx instanceof PortletApplicationContext)) {
// TODO Should we even try this? And should we leave original as-is?
PortletApplicationContext pcx = new PortletApplicationContext();
pcx.applications.addAll(cx.applications);
cx.applications.clear();
pcx.browser = cx.browser;
cx.browser = null;
pcx.listeners = cx.listeners;
cx.listeners = null;
pcx.session = cx.session;
cx = pcx;
}
if (((PortletApplicationContext) cx).portletSession == null) {
((PortletApplicationContext) cx).portletSession = session;
}
session.setAttribute(WebApplicationContext.class.getName(), cx,
PortletSession.APPLICATION_SCOPE);
return (PortletApplicationContext) cx;
}
static public WebApplicationContext getApplicationContext(
HttpSession session) {
WebApplicationContext cx = (WebApplicationContext) session
.getAttribute(WebApplicationContext.class.getName());
if (cx == null) {
cx = new PortletApplicationContext();
}
if (cx.session == null) {
cx.session = session;
}
session.setAttribute(WebApplicationContext.class.getName(), cx);
return cx;
}
@Override
protected void removeApplication(Application application) {
portletListeners.remove(application);
for (Iterator<Application> it = portletToApplication.values()
.iterator(); it.hasNext();) {
Application value = it.next();
if (value == application) {
// values().iterator() is backed by the map
it.remove();
}
}
super.removeApplication(application);
}
public void setPortletApplication(Portlet portlet, Application app) {
portletToApplication.put(portlet, app);
}
public Application getPortletApplication(Portlet portlet) {
return portletToApplication.get(portlet);
}
public PortletSession getPortletSession() {
return portletSession;
}
public void addPortletListener(Application app, PortletListener listener) {
Set<PortletListener> l = portletListeners.get(app);
if (l == null) {
l = new LinkedHashSet<PortletListener>();
portletListeners.put(app, l);
}
l.add(listener);
}
public void removePortletListener(Application app, PortletListener listener) {
Set<PortletListener> l = portletListeners.get(app);
if (l != null) {
l.remove(listener);
}
}
public static void dispatchRequest(Portlet portlet, RenderRequest request,
RenderResponse response) {
PortletApplicationContext ctx = getApplicationContext(request
.getPortletSession());
if (ctx != null) {
ctx.firePortletRenderRequest(portlet, request, response);
}
}
public static void dispatchRequest(Portlet portlet, ActionRequest request,
ActionResponse response) {
PortletApplicationContext ctx = getApplicationContext(request
.getPortletSession());
if (ctx != null) {
ctx.firePortletActionRequest(portlet, request, response);
}
}
public void firePortletRenderRequest(Portlet portlet,
RenderRequest request, RenderResponse response) {
Application app = getPortletApplication(portlet);
Set<PortletListener> listeners = portletListeners.get(app);
if (listeners != null) {
for (PortletListener l : listeners) {
l.handleRenderRequest(request, new RestrictedRenderResponse(
response));
}
}
}
public void firePortletActionRequest(Portlet portlet,
ActionRequest request, ActionResponse response) {
Application app = getPortletApplication(portlet);
Set<PortletListener> listeners = portletListeners.get(app);
if (listeners != null) {
for (PortletListener l : listeners) {
l.handleActionRequest(request, response);
}
}
}
public interface PortletListener extends Serializable {
public void handleRenderRequest(RenderRequest request,
RenderResponse response);
public void handleActionRequest(ActionRequest request,
ActionResponse response);
}
}