Struts example source code file (SpringProxyableObjectFactory.java)

This example Struts source code file (SpringProxyableObjectFactory.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 - Struts tags/keywords

applicationcontext, arraylist, beandefinitionregistry, beandefinitionregistry, log, map, nosuchbeandefinitionexception, nosuchbeandefinitionexception, object, object, objectfactory, rootbeandefinition, rootbeandefinition, springobjectfactory, util

The Struts SpringProxyableObjectFactory.java source code

/*
 * Copyright 2002-2006,2009 The Apache Software Foundation.
 * 
 * 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.opensymphony.xwork2.spring;

import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.ApplicationContext;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * SpringProxyableObjectFactory.
 *
 * @author Jason Carreira
 */
public class SpringProxyableObjectFactory extends SpringObjectFactory {
    
    private static final Logger LOG = LoggerFactory.getLogger(SpringProxyableObjectFactory.class);

    private List<String> skipBeanNames = new ArrayList();

    @Override
    public Object buildBean(String beanName, Map<String, Object> extraContext) throws Exception {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Building bean for name " + beanName);
        }
        if (!skipBeanNames.contains(beanName)) {
            ApplicationContext anAppContext = getApplicationContext(extraContext);
            try {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Trying the application context... appContext = " + anAppContext + ",\n bean name = " + beanName);
                }
                return anAppContext.getBean(beanName);
            } catch (NoSuchBeanDefinitionException e) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Did not find bean definition for bean named " + beanName + ", creating a new one...");
                }
                if (autoWiringFactory instanceof BeanDefinitionRegistry) {
                    try {
                        Class clazz = Class.forName(beanName);
                        BeanDefinitionRegistry registry = (BeanDefinitionRegistry) autoWiringFactory;
                        RootBeanDefinition def = new RootBeanDefinition(clazz, autowireStrategy);
                        def.setSingleton(false);
                         if (LOG.isDebugEnabled()) {
                            LOG.debug("Registering a new bean definition for class " + beanName);
                        }
                        registry.registerBeanDefinition(beanName,def);
                        try {
                            return anAppContext.getBean(beanName);
                        } catch (NoSuchBeanDefinitionException e2) {
                            LOG.warn("Could not register new bean definition for bean " + beanName);
                            skipBeanNames.add(beanName);
                        }
                    } catch (ClassNotFoundException e1) {
                        skipBeanNames.add(beanName);
                    }
                }
            }
        }
        if (LOG.isDebugEnabled()) {
            LOG.debug("Returning autowired instance created by default ObjectFactory");
        }
        return autoWireBean(super.buildBean(beanName, extraContext), autoWiringFactory);
    }

    /**
     * Subclasses may override this to return a different application context.
     * Note that this application context should see any changes made to the
     * <code>autoWiringFactory, so the application context should be either
     * the original or a child context of the original.
     *
     * @param context  provided context.
     */
    protected ApplicationContext getApplicationContext(Map<String, Object> context) {
        return appContext;
    }
}