Spring Framework example source code file (SimplePortletPostProcessor.java)

This example Spring Framework source code file (SimplePortletPostProcessor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

beaninitializationexception, beansexception, delegatingportletconfig, object, portlet, portlet, portletconfig, portletconfig, portletconfigaware, portletcontext, portletcontext, simpleportletpostprocessor, string, string, util

The Spring Framework SimplePortletPostProcessor.java source code

/*
 * Copyright 2002-2006 the original author or authors.
 *
 * 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.springframework.web.portlet.handler;

import java.util.Collections;
import java.util.Enumeration;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.portlet.Portlet;
import javax.portlet.PortletConfig;
import javax.portlet.PortletContext;
import javax.portlet.PortletException;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanInitializationException;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
import org.springframework.web.portlet.context.PortletConfigAware;
import org.springframework.web.portlet.context.PortletContextAware;

/**
 * Bean post-processor that applies initialization and destruction callbacks
 * to beans that implement the Portlet interface.
 *
 * <p>After initialization of the bean instance, the Portlet init
 * method will be called with a PortletConfig that contains the bean name
 * of the Portlet and the PortletContext that it is running in.
 *
 * <p>Before destruction of the bean instance, the Portlet destroy
 * will be called.
 *
 * <p>Note that this post-processor does not support Portlet initialization
 * parameters.</b> Bean instances that implement the Portlet interface are
 * supposed to be configured like any other Spring bean, that is, through
 * constructor arguments or bean properties.
 *
 * <p>For reuse of a Portlet implementation in a plain Portlet container and as
 * a bean in a Spring context, consider deriving from Spring's GenericPortletBean
 * base class that applies Portlet initialization parameters as bean properties,
 * supporting both initialization styles.
 *
 * <p>Alternatively, consider wrapping a Portlet with Spring's
 * PortletWrappingController.</b> This is particularly appropriate for
 * existing Portlet classes, allowing to specify Portlet initialization
 * parameters etc.
 *
 * @author Juergen Hoeller
 * @author John A. Lewis
 * @since 2.0
 * @see javax.portlet.Portlet
 * @see javax.portlet.PortletConfig
 * @see SimplePortletHandlerAdapter
 * @see org.springframework.web.portlet.GenericPortletBean
 * @see org.springframework.web.portlet.mvc.PortletWrappingController
 */
public class SimplePortletPostProcessor
	implements DestructionAwareBeanPostProcessor, PortletContextAware, PortletConfigAware {

	private boolean useSharedPortletConfig = true;

	private PortletContext portletContext;

	private PortletConfig portletConfig;


	/**
	 * Set whether to use the shared PortletConfig object passed in
	 * through <code>setPortletConfig, if available.
	 * <p>Default is "true". Turn this setting to "false" to pass in
	 * a mock PortletConfig object with the bean name as portlet name,
	 * holding the current PortletContext.
	 * @see #setPortletConfig
	 */
	public void setUseSharedPortletConfig(boolean useSharedPortletConfig) {
		this.useSharedPortletConfig = useSharedPortletConfig;
	}

	public void setPortletContext(PortletContext portletContext) {
		this.portletContext = portletContext;
	}

	public void setPortletConfig(PortletConfig portletConfig) {
		this.portletConfig = portletConfig;
	}


	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
		return bean;
	}

	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
		if (bean instanceof Portlet) {
			PortletConfig config = this.portletConfig;
			if (config == null || !this.useSharedPortletConfig) {
				config = new DelegatingPortletConfig(beanName, this.portletContext, this.portletConfig);
			}
			try {
				((Portlet) bean).init(config);
			}
			catch (PortletException ex) {
				throw new BeanInitializationException("Portlet.init threw exception", ex);
			}
		}
		return bean;
	}

	public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
		if (bean instanceof Portlet) {
			((Portlet) bean).destroy();
		}
	}


	/**
	 * Internal implementation of the PortletConfig interface, to be passed
	 * to the wrapped servlet.
	 */
	private static class DelegatingPortletConfig implements PortletConfig {

		private final String portletName;

		private final PortletContext portletContext;

        private final PortletConfig portletConfig;

        public DelegatingPortletConfig(String portletName, PortletContext portletContext, PortletConfig portletConfig) {
			this.portletName = portletName;
			this.portletContext = portletContext;
            this.portletConfig = portletConfig;
		}

		public String getPortletName() {
			return portletName;
		}

		public PortletContext getPortletContext() {
			return portletContext;
		}

		public String getInitParameter(String paramName) {
			return null;
		}

		public Enumeration getInitParameterNames() {
			return Collections.enumeration(Collections.EMPTY_SET);
		}

		public ResourceBundle getResourceBundle(Locale locale) {
            return portletConfig == null ? null : portletConfig.getResourceBundle(locale);
		}
	}

}