/**
 * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *         Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.runtime.web.vaadin.osgi.servlet;

import javax.servlet.http.HttpServletRequest;

import com.vaadin.server.DeploymentConfiguration;
import com.vaadin.server.ServiceException;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.server.VaadinServletService;
import com.vaadin.server.VaadinSession;

// TODO: Auto-generated Javadoc
/**
 * The Class OSGiServletService.
 */
@SuppressWarnings("serial")
public class OSGiServletService extends VaadinServletService {

	/** The factory. */
	private final IVaadinSessionFactory factory;

	/**
	 * Instantiates a new OS gi servlet service.
	 *
	 * @param servlet
	 *            the servlet
	 * @param deploymentConfiguration
	 *            the deployment configuration
	 * @param factory
	 *            the factory
	 * @throws ServiceException
	 *             the service exception
	 */
	public OSGiServletService(VaadinServlet servlet,
			DeploymentConfiguration deploymentConfiguration,
			IVaadinSessionFactory factory) throws ServiceException {
		super(servlet, deploymentConfiguration);
		this.factory = factory;
	}

	/* (non-Javadoc)
	 * @see com.vaadin.server.VaadinServletService#getConfiguredWidgetset(com.vaadin.server.VaadinRequest)
	 */
	@Override
	public String getConfiguredWidgetset(VaadinRequest request) {
		return super.getConfiguredWidgetset(request);
	}

	/* (non-Javadoc)
	 * @see com.vaadin.server.VaadinService#getClassLoader()
	 */
	@Override
	public ClassLoader getClassLoader() {
		return getClass().getClassLoader();
	}

	/* (non-Javadoc)
	 * @see com.vaadin.server.VaadinService#createVaadinSession(com.vaadin.server.VaadinRequest)
	 */
	@Override
	protected VaadinSession createVaadinSession(VaadinRequest request)
			throws ServiceException {
		return factory.createSession(request, getCurrentServletRequest());
	}

	/**
	 * Creates new instances of vaadin sessions.
	 */
	public interface IVaadinSessionFactory {
		
		/**
		 * Returns a new instance of a vaadin session.
		 *
		 * @param request
		 *            the request
		 * @param httpServletRequest
		 *            the http servlet request
		 * @return the vaadin session
		 */
		VaadinSession createSession(VaadinRequest request,
				HttpServletRequest httpServletRequest);
	}
}