org.broadleafcommerce.common.extensibility.context.MergeFileSystemXMLApplicationContext Maven / Gradle / Ivy
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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;
/**
* 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 MergeFileSystemXMLApplicationContext extends AbstractMergeXMLApplicationContext {
public MergeFileSystemXMLApplicationContext(ApplicationContext parent) {
super(parent);
}
/**
* Create a new MergeClassPathXMLApplicationContext, loading the definitions from the given files. Note,
* all sourceLocation files will be merged using standard Spring configuration override rules. However, the patch
* files are fully merged into the result of the sourceLocations simple merge. Patch merges are first executed according
* to beans with the same id. Subsequent merges within a bean are executed against tagnames - ignoring any
* further id attributes.
*
* @param sourceLocations array of absolute file system paths for the source application context files
* @param patchLocations array of absolute file system paths for the patch application context files
* @throws BeansException
*/
public MergeFileSystemXMLApplicationContext(String[] sourceLocations, String[] patchLocations) throws BeansException {
this(sourceLocations, patchLocations, null);
}
/**
* Create a new MergeClassPathXMLApplicationContext, loading the definitions from the given files. Note,
* all sourceLocation files will be merged using standard Spring configuration override rules. However, the patch
* files are fully merged into the result of the sourceLocations simple merge. Patch merges are first executed according
* to beans with the same id. Subsequent merges within a bean are executed against tagnames - ignoring any
* further id attributes.
*
* @param sourceLocations array of absolute file system paths for the source application context files
* @param patchLocations array of absolute file system paths for the patch application context files
* @param parent the parent context
* @throws BeansException
*/
public MergeFileSystemXMLApplicationContext(String[] sourceLocations, String[] patchLocations, ApplicationContext parent) throws BeansException {
this(parent);
ResourceInputStream[] sources;
ResourceInputStream[] patches;
try {
sources = new ResourceInputStream[sourceLocations.length];
for (int j=0;j