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/*
 * Copyright 2008-2013 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.broadleafcommerce.common.extensibility.context;

import org.broadleafcommerce.common.extensibility.context.merge.ImportProcessor;
import org.broadleafcommerce.common.extensibility.context.merge.exceptions.MergeException;
import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.context.ApplicationContext;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * Standalone XML application context, taking the locations of one or more
 * source applicationContext xml files and one or more patch xml files.
 * 
 * 

One or more source files merge together in pure override mode. Source * files are merged in the order specified. If a bean id is repeated in a subsequent * source file, the subsequent bean definition will always win. This is the same behavior * as Spring's default mechanism for merging 1 to N applicationContext files.

* *

Each patch file is merged with the combined source, one patch file at a time. This * merge is performed in true merge mode. Therefore, if a bean id is delivered in a patch * file with the same id as a bean in the source, the patch will merge with the source. This * could result in an override of the class definition for the bean, or additional or changed * property elements within the bean definition.

* * @author jfischer * */ public class MergeFileSystemAndClassPathXMLApplicationContext extends AbstractMergeXMLApplicationContext { public MergeFileSystemAndClassPathXMLApplicationContext(ApplicationContext parent) { super(parent); } public MergeFileSystemAndClassPathXMLApplicationContext(String[] classPathLocations, String[] fileSystemLocations) throws BeansException { this(classPathLocations, fileSystemLocations, null); } public MergeFileSystemAndClassPathXMLApplicationContext(LinkedHashMap locations, ApplicationContext parent) throws BeansException { this(parent); ResourceInputStream[] resources = new ResourceInputStream[locations.size()]; int j = 0; for (Map.Entry entry : locations.entrySet()) { switch (entry.getValue()) { case CLASSPATH: resources[j] = new ResourceInputStream(getClassLoader(parent).getResourceAsStream(entry.getKey()), entry.getKey()); break; case FILESYSTEM: try { File temp = new File(entry.getKey()); resources[j] = new ResourceInputStream(new BufferedInputStream(new FileInputStream(temp)), entry.getKey()); } catch (FileNotFoundException e) { throw new FatalBeanException("Unable to merge context files", e); } break; } j++; } ImportProcessor importProcessor = new ImportProcessor(this); try { resources = importProcessor.extract(resources); } catch (MergeException e) { throw new FatalBeanException("Unable to merge source and patch locations", e); } this.configResources = new MergeApplicationContextXmlConfigResource().getConfigResources(resources, null); refresh(); } public MergeFileSystemAndClassPathXMLApplicationContext(String[] classPathLocations, String[] fileSystemLocations, ApplicationContext parent) throws BeansException { this(parent); ResourceInputStream[] classPathSources; ResourceInputStream[] fileSystemSources; try { classPathSources = new ResourceInputStream[classPathLocations.length]; for (int j=0;j




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