001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.xbean.spring.context;
018
019import java.io.IOException;
020import java.util.Collections;
021import java.util.Iterator;
022import java.util.List;
023
024import org.apache.xbean.spring.context.impl.XBeanHelper;
025import org.springframework.beans.BeansException;
026import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
027import org.springframework.beans.factory.support.DefaultListableBeanFactory;
028import org.springframework.beans.factory.xml.ResourceEntityResolver;
029import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
030import org.springframework.context.ApplicationContext;
031import org.springframework.context.support.AbstractXmlApplicationContext;
032import org.springframework.core.io.Resource;
033
034/**
035 * An XBean version of a regular Spring ApplicationContext which takes a
036 * {@link Resource} as a parameter to load the application context
037 * 
038 * @author James Strachan
039 * @author Dain Sundstrom
040 * @version $Id$
041 * @since 2.0
042 */
043public class ResourceXmlApplicationContext extends AbstractXmlApplicationContext implements SpringApplicationContext {
044    private final List xmlPreprocessors;
045    private final Resource resource;
046
047    /**
048     * Creates a ResourceXmlApplicationContext which loads the configuration from the specified Resource.
049     * @param resource the resource from which the configuration is loaded
050     */
051    public ResourceXmlApplicationContext(Resource resource) {
052        this(resource, Collections.EMPTY_LIST);
053    }
054  
055    /**
056     * Creates a ResourceXmlApplicationContext which loads the configuration from the specified Resource.
057     * @param resource the resource from which the configuration is loaded
058     * @param xmlPreprocessors the SpringXmlPreprocessors to apply before passing the xml to Spring for processing
059     */
060    public ResourceXmlApplicationContext(Resource resource, List xmlPreprocessors) {
061        super();
062        this.xmlPreprocessors = xmlPreprocessors;
063        this.resource = resource;
064        refresh();
065    }
066
067    public ResourceXmlApplicationContext(Resource resource, ApplicationContext parent) {
068        this(resource, Collections.EMPTY_LIST, parent);
069    }
070
071    public ResourceXmlApplicationContext(Resource resource,  List xmlPreprocessors, ApplicationContext parent) {
072        this(resource, xmlPreprocessors, parent, Collections.EMPTY_LIST);
073    }
074    
075    public ResourceXmlApplicationContext(Resource resource,  List xmlPreprocessors, ApplicationContext parent, List beanPostProcessors) {
076        this(resource, xmlPreprocessors, parent, beanPostProcessors, true);
077    }
078
079    public ResourceXmlApplicationContext(Resource resource,  List xmlPreprocessors, ApplicationContext parent, List beanPostProcessors, boolean refresh) {
080        super(parent);
081        this.xmlPreprocessors = xmlPreprocessors;
082        this.resource = resource;
083        for (Iterator iter = beanPostProcessors.iterator(); iter.hasNext();) {
084            BeanFactoryPostProcessor processor =  (BeanFactoryPostProcessor) iter.next();
085            addBeanFactoryPostProcessor(processor);
086        }
087        if (refresh) {
088            refresh();
089        }
090    }
091
092    protected void loadBeanDefinitions(DefaultListableBeanFactory beanFactory) throws IOException {
093        // Create a new XmlBeanDefinitionReader for the given BeanFactory.
094        XmlBeanDefinitionReader beanDefinitionReader = XBeanHelper.createBeanDefinitionReader(this, beanFactory, xmlPreprocessors);
095
096        // Configure the bean definition reader with this context's
097        // resource loading environment.
098        beanDefinitionReader.setResourceLoader(this);
099        beanDefinitionReader.setEntityResolver(new ResourceEntityResolver(this));
100
101        // Allow a subclass to provide custom initialization of the reader,
102        // then proceed with actually loading the bean definitions.
103        initBeanDefinitionReader(beanDefinitionReader);
104        loadBeanDefinitions(beanDefinitionReader);
105    }
106    
107    /**
108     * {@inheritDoc}
109     */
110    protected void loadBeanDefinitions(XmlBeanDefinitionReader reader) throws BeansException, IOException {
111        reader.loadBeanDefinitions(resource);
112    }
113
114    /**
115     * {@inheritDoc}
116     */
117    protected String[] getConfigLocations() {
118        return null;
119    }
120}