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     */
017    package org.apache.xbean.spring.context;
018    
019    import java.io.IOException;
020    import java.util.Collections;
021    import java.util.Iterator;
022    import java.util.List;
023    
024    import org.apache.xbean.spring.context.impl.XBeanHelper;
025    import org.springframework.beans.BeansException;
026    import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
027    import org.springframework.beans.factory.support.DefaultListableBeanFactory;
028    import org.springframework.beans.factory.xml.ResourceEntityResolver;
029    import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
030    import org.springframework.context.ApplicationContext;
031    import org.springframework.context.support.AbstractXmlApplicationContext;
032    import 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     */
043    public 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    }