/*
 * Copyright 2004-2011 the Seasar Foundation and the Others.
 *
 * 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 org.seasar.teeda.core.util;

import javax.faces.context.FacesContext;
import javax.portlet.RenderResponse;

import org.seasar.teeda.core.context.portlet.PortletFacesContextImpl;

/**
 * This is a utility class to check if a process is on Portlet environment.
 * 
 * @author shinsuke
 * 
 */
public class PortletUtil {

    /** do not allow a new instance */
    private PortletUtil() {
    }

    /**
     *  Check if the thread is running on Portlet.
     * 
     * @param facesContext
     * @return
     */
    public static boolean isPortlet(FacesContext facesContext) {
        if (facesContext instanceof PortletFacesContextImpl) {
            return true;
        }
        return false;
    }

    /**
     * Check if the thread is processing render method.
     * 
     * @param facesContext
     * @return
     */
    public static boolean isRender(FacesContext facesContext) {
        if (isPortlet(facesContext)) {
            return facesContext.getExternalContext().getResponse() instanceof RenderResponse;
        }
        return false;
    }

}
