org.springframework.boot.context.properties.source.AliasedConfigurationPropertySource Maven / Gradle / Ivy
/*
* 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 org.springframework.util.Assert;
/**
* A {@link ConfigurationPropertySource} supporting name aliases.
*
* @author Phillip Webb
* @author Madhura Bhave
*/
class AliasedConfigurationPropertySource implements ConfigurationPropertySource {
private final ConfigurationPropertySource source;
private final ConfigurationPropertyNameAliases aliases;
AliasedConfigurationPropertySource(ConfigurationPropertySource source, ConfigurationPropertyNameAliases aliases) {
Assert.notNull(source, "Source must not be null");
Assert.notNull(aliases, "Aliases must not be null");
this.source = source;
this.aliases = aliases;
}
@Override
public ConfigurationProperty getConfigurationProperty(ConfigurationPropertyName name) {
Assert.notNull(name, "Name must not be null");
ConfigurationProperty result = getSource().getConfigurationProperty(name);
if (result == null) {
ConfigurationPropertyName aliasedName = getAliases().getNameForAlias(name);
result = getSource().getConfigurationProperty(aliasedName);
}
return result;
}
@Override
public ConfigurationPropertyState containsDescendantOf(ConfigurationPropertyName name) {
Assert.notNull(name, "Name must not be null");
ConfigurationPropertyState result = this.source.containsDescendantOf(name);
if (result != ConfigurationPropertyState.ABSENT) {
return result;
}
for (ConfigurationPropertyName alias : getAliases().getAliases(name)) {
ConfigurationPropertyState aliasResult = this.source.containsDescendantOf(alias);
if (aliasResult != ConfigurationPropertyState.ABSENT) {
return aliasResult;
}
}
for (ConfigurationPropertyName from : getAliases()) {
for (ConfigurationPropertyName alias : getAliases().getAliases(from)) {
if (name.isAncestorOf(alias)) {
if (this.source.getConfigurationProperty(from) != null) {
return ConfigurationPropertyState.PRESENT;
}
}
}
}
return ConfigurationPropertyState.ABSENT;
}
@Override
public Object getUnderlyingSource() {
return this.source.getUnderlyingSource();
}
protected ConfigurationPropertySource getSource() {
return this.source;
}
protected ConfigurationPropertyNameAliases getAliases() {
return this.aliases;
}
}