spring SortedResourcesFactoryBean 源码
spring SortedResourcesFactoryBean 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/config/SortedResourcesFactoryBean.java
/*
* Copyright 2002-2018 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
*
* https://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.springframework.jdbc.config;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternUtils;
/**
* {@link FactoryBean} implementation that takes a list of location Strings
* and creates a sorted array of {@link Resource} instances.
*
* @author Dave Syer
* @author Juergen Hoeller
* @author Christian Dupuis
* @since 3.0
*/
public class SortedResourcesFactoryBean extends AbstractFactoryBean<Resource[]> implements ResourceLoaderAware {
private final List<String> locations;
private ResourcePatternResolver resourcePatternResolver;
public SortedResourcesFactoryBean(List<String> locations) {
this.locations = locations;
this.resourcePatternResolver = new PathMatchingResourcePatternResolver();
}
public SortedResourcesFactoryBean(ResourceLoader resourceLoader, List<String> locations) {
this.locations = locations;
this.resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader);
}
@Override
public void setResourceLoader(ResourceLoader resourceLoader) {
this.resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader);
}
@Override
public Class<? extends Resource[]> getObjectType() {
return Resource[].class;
}
@Override
protected Resource[] createInstance() throws Exception {
List<Resource> scripts = new ArrayList<>();
for (String location : this.locations) {
List<Resource> resources = new ArrayList<>(
Arrays.asList(this.resourcePatternResolver.getResources(location)));
resources.sort((r1, r2) -> {
try {
return r1.getURL().toString().compareTo(r2.getURL().toString());
}
catch (IOException ex) {
return 0;
}
});
scripts.addAll(resources);
}
return scripts.toArray(new Resource[0]);
}
}
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