/*
 * Copyright 2000-2016 Vaadin 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.osgi.liferay;

import org.osgi.framework.ServiceObjects;

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

/**
 * Vaadin {@link com.vaadin.server.UIProvider} that provides a single {@link UI}
 * class provided through the registration of a {@link UI} as an OSGi service.
 * <p>
 * This only applies to Liferay Portal 7+ with OSGi support.
 *
 * @author Sampsa Sohlman
 *
 * @since 8.1
 */
@SuppressWarnings("serial")
public class OSGiUIProvider extends UIProvider {
    private Class<UI> uiClass;

    @SuppressWarnings("unchecked")
    public OSGiUIProvider(ServiceObjects<UI> serviceObjects) {
        super();
        UI ui = serviceObjects.getService();
        uiClass = (Class<UI>) ui.getClass();
        serviceObjects.ungetService(ui);
    }

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

    public String getDefaultPortletName() {
        return uiClass.getName();
    }

    public String getDefaultDisplayName() {
        return uiClass.getSimpleName();
    }

}