spring ConfigTreeConfigDataLocationResolver 源码
springboot ConfigTreeConfigDataLocationResolver 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/config/ConfigTreeConfigDataLocationResolver.java
/*
* Copyright 2012-2021 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.boot.context.config;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.springframework.boot.context.config.LocationResourceLoader.ResourceType;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.Assert;
/**
* {@link ConfigDataLocationResolver} for config tree locations.
*
* @author Madhura Bhave
* @author Phillip Webb
* @since 2.4.0
*/
public class ConfigTreeConfigDataLocationResolver implements ConfigDataLocationResolver<ConfigTreeConfigDataResource> {
private static final String PREFIX = "configtree:";
private final LocationResourceLoader resourceLoader;
public ConfigTreeConfigDataLocationResolver(ResourceLoader resourceLoader) {
this.resourceLoader = new LocationResourceLoader(resourceLoader);
}
@Override
public boolean isResolvable(ConfigDataLocationResolverContext context, ConfigDataLocation location) {
return location.hasPrefix(PREFIX);
}
@Override
public List<ConfigTreeConfigDataResource> resolve(ConfigDataLocationResolverContext context,
ConfigDataLocation location) {
try {
return resolve(location.getNonPrefixedValue(PREFIX));
}
catch (IOException ex) {
throw new ConfigDataLocationNotFoundException(location, ex);
}
}
private List<ConfigTreeConfigDataResource> resolve(String location) throws IOException {
Assert.isTrue(location.endsWith("/"),
() -> String.format("Config tree location '%s' must end with '/'", location));
if (!this.resourceLoader.isPattern(location)) {
return Collections.singletonList(new ConfigTreeConfigDataResource(location));
}
Resource[] resources = this.resourceLoader.getResources(location, ResourceType.DIRECTORY);
List<ConfigTreeConfigDataResource> resolved = new ArrayList<>(resources.length);
for (Resource resource : resources) {
resolved.add(new ConfigTreeConfigDataResource(resource.getFile().toPath()));
}
return resolved;
}
}
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