spring ConfigurationPropertyNameAliases 源码
springboot ConfigurationPropertyNameAliases 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameAliases.java
/*
* Copyright 2012-2019 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.properties.source;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.springframework.util.Assert;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* Maintains a mapping of {@link ConfigurationPropertyName} aliases.
*
* @author Phillip Webb
* @author Madhura Bhave
* @since 2.0.0
* @see ConfigurationPropertySource#withAliases(ConfigurationPropertyNameAliases)
*/
public final class ConfigurationPropertyNameAliases implements Iterable<ConfigurationPropertyName> {
private final MultiValueMap<ConfigurationPropertyName, ConfigurationPropertyName> aliases = new LinkedMultiValueMap<>();
public ConfigurationPropertyNameAliases() {
}
public ConfigurationPropertyNameAliases(String name, String... aliases) {
addAliases(name, aliases);
}
public ConfigurationPropertyNameAliases(ConfigurationPropertyName name, ConfigurationPropertyName... aliases) {
addAliases(name, aliases);
}
public void addAliases(String name, String... aliases) {
Assert.notNull(name, "Name must not be null");
Assert.notNull(aliases, "Aliases must not be null");
addAliases(ConfigurationPropertyName.of(name),
Arrays.stream(aliases).map(ConfigurationPropertyName::of).toArray(ConfigurationPropertyName[]::new));
}
public void addAliases(ConfigurationPropertyName name, ConfigurationPropertyName... aliases) {
Assert.notNull(name, "Name must not be null");
Assert.notNull(aliases, "Aliases must not be null");
this.aliases.addAll(name, Arrays.asList(aliases));
}
public List<ConfigurationPropertyName> getAliases(ConfigurationPropertyName name) {
return this.aliases.getOrDefault(name, Collections.emptyList());
}
public ConfigurationPropertyName getNameForAlias(ConfigurationPropertyName alias) {
return this.aliases.entrySet().stream().filter((e) -> e.getValue().contains(alias)).map(Map.Entry::getKey)
.findFirst().orElse(null);
}
@Override
public Iterator<ConfigurationPropertyName> iterator() {
return this.aliases.keySet().iterator();
}
}
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