org.lunifera.runtime.web.vaadin.osgi.webapp.OSGiUIProvider.java Source code

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Here is the source code for org.lunifera.runtime.web.vaadin.osgi.webapp.OSGiUIProvider.java

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/**
 * Copyright (c) 2011 - 2014, Lunifera GmbH (Gross Enzersdorf), Loetz KG (Heidelberg)
 * 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.lunifera.runtime.web.vaadin.osgi.webapp;

import java.util.Dictionary;
import java.util.Hashtable;

import org.lunifera.runtime.web.vaadin.osgi.common.OSGiUI;
import org.osgi.service.component.ComponentFactory;
import org.osgi.service.component.ComponentInstance;

import com.vaadin.server.UIClassSelectionEvent;
import com.vaadin.server.UICreateEvent;
import com.vaadin.server.UIProvider;
import com.vaadin.ui.UI;

@SuppressWarnings("serial")
public class OSGiUIProvider extends UIProvider {

    private ComponentFactory uiFactory;
    private final Class<? extends UI> uiClass;
    private final String vaadinApplication;

    public OSGiUIProvider(String vaadinApplication, Class<? extends UI> uiClass) {
        super();
        this.uiClass = uiClass;
        this.vaadinApplication = vaadinApplication;
    }

    /**
     * Sets the component factory used to create new UI instances.
     * 
     * @param uiFactory
     */
    void setUIFactory(ComponentFactory uiFactory) {
        this.uiFactory = uiFactory;
    }

    /**
     * Returns the component factory.
     * 
     * @return factory
     */
    ComponentFactory getUIFactory() {
        return this.uiFactory;
    }

    /**
     * Returns the vaadin application this UI provider belongs to. If
     * <code>null</code> then this UI provider can be used for each vaadin
     * application.
     * 
     * @return the vaadinApplication
     */
    protected String getVaadinApplication() {
        return vaadinApplication;
    }

    @Override
    public Class<? extends UI> getUIClass(UIClassSelectionEvent event) {
        return uiClass;
    }

    @Override
    public UI createInstance(UICreateEvent event) {
        Dictionary<String, Object> properties = new Hashtable<String, Object>();

        ComponentInstance instance = uiFactory.newInstance(properties);
        OSGiUI ui = (OSGiUI) instance.getInstance();
        ui.setComponentInstance(instance);

        return ui;
    }

}