/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements.  See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.apache.pluto;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.apache.pluto.core.DefaultOptionalContainerServices;import org.apache.pluto.core.PortletContainerImpl;import org.apache.pluto.util.ArgumentUtility;/** * Factory used to create new PortletContainer instances.  The factor constructs * the underlying pluto container implementation by using the the given * container services. * * @version 1.0 * @since Sep 18, 2004 */public class PortletContainerFactory {    /** Logger. */    private static final Log LOG = LogFactory.getLog(PortletContainerFactory.class);    /** Singleton instance of the <code>PortletContainerFactory</code>. */    private static final PortletContainerFactory FACTORY =    		new PortletContainerFactory();    /**     * Accessor method for the singleton instance of the     * <code>PortletContainerFactory</code>.     * @return singleton instance of the PortletContainerFactory     */    public static PortletContainerFactory getInstance() {    	return FACTORY;    }    /**     * Private constructor that prevents external instantiation.     */    private PortletContainerFactory() {    	// Do nothing.    }    /**     * Create a container with the given containerName, initialized from the given     * servlet config, and using the given container services.     * @param containerName  the name of the portlet container.     * @param requiredServices  the required portlet container services.     * @return newly created PortletContainer instance.     * @throws PortletContainerException     */    public PortletContainer createContainer(    		String containerName,    		RequiredContainerServices requiredServices)        throws PortletContainerException {        return createContainer(containerName,                               requiredServices,                               new DefaultOptionalContainerServices());   }    public PortletContainer createContainer(    		String containerName,    		RequiredContainerServices requiredServices,    		OptionalContainerServices optionalServices) {        ArgumentUtility.validateNotNull("requiredServices", requiredServices);        ArgumentUtility.validateNotEmpty("containerName", containerName);        PortletContainer container = new PortletContainerImpl(        		containerName, requiredServices, optionalServices);        if (LOG.isInfoEnabled()) {            LOG.info("Portlet Container [" + containerName + "] created.");        }        return container;    }}