001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.jdbc.config; 018 019import java.io.IOException; 020import java.util.ArrayList; 021import java.util.Arrays; 022import java.util.Collections; 023import java.util.Comparator; 024import java.util.List; 025 026import org.springframework.beans.factory.FactoryBean; 027import org.springframework.beans.factory.config.AbstractFactoryBean; 028import org.springframework.context.ResourceLoaderAware; 029import org.springframework.core.io.Resource; 030import org.springframework.core.io.ResourceLoader; 031import org.springframework.core.io.support.PathMatchingResourcePatternResolver; 032import org.springframework.core.io.support.ResourcePatternResolver; 033import org.springframework.core.io.support.ResourcePatternUtils; 034 035/** 036 * {@link FactoryBean} implementation that takes a list of location Strings 037 * and creates a sorted array of {@link Resource} instances. 038 * 039 * @author Dave Syer 040 * @author Juergen Hoeller 041 * @author Christian Dupuis 042 * @since 3.0 043 */ 044public class SortedResourcesFactoryBean extends AbstractFactoryBean<Resource[]> implements ResourceLoaderAware { 045 046 private final List<String> locations; 047 048 private ResourcePatternResolver resourcePatternResolver; 049 050 051 public SortedResourcesFactoryBean(List<String> locations) { 052 this.locations = locations; 053 this.resourcePatternResolver = new PathMatchingResourcePatternResolver(); 054 } 055 056 public SortedResourcesFactoryBean(ResourceLoader resourceLoader, List<String> locations) { 057 this.locations = locations; 058 this.resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader); 059 } 060 061 062 @Override 063 public void setResourceLoader(ResourceLoader resourceLoader) { 064 this.resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader); 065 } 066 067 068 @Override 069 public Class<? extends Resource[]> getObjectType() { 070 return Resource[].class; 071 } 072 073 @Override 074 protected Resource[] createInstance() throws Exception { 075 List<Resource> scripts = new ArrayList<Resource>(); 076 for (String location : this.locations) { 077 List<Resource> resources = new ArrayList<Resource>( 078 Arrays.asList(this.resourcePatternResolver.getResources(location))); 079 Collections.sort(resources, new Comparator<Resource>() { 080 @Override 081 public int compare(Resource r1, Resource r2) { 082 try { 083 return r1.getURL().toString().compareTo(r2.getURL().toString()); 084 } 085 catch (IOException ex) { 086 return 0; 087 } 088 } 089 }); 090 for (Resource resource : resources) { 091 scripts.add(resource); 092 } 093 } 094 return scripts.toArray(new Resource[scripts.size()]); 095 } 096 097}