org.springframework.boot.context.properties.source.DefaultPropertyMapper Maven / Gradle / Ivy
/*
* Copyright 2012-2020 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.Collections;
import java.util.List;
import org.springframework.util.ObjectUtils;
/**
* Default {@link PropertyMapper} implementation. Names are mapped by removing invalid
* characters and converting to lower case. For example "{@code my.server_name.PORT}" is
* mapped to "{@code my.servername.port}".
*
* @author Phillip Webb
* @author Madhura Bhave
* @see PropertyMapper
* @see SpringConfigurationPropertySource
*/
final class DefaultPropertyMapper implements PropertyMapper {
public static final PropertyMapper INSTANCE = new DefaultPropertyMapper();
private LastMapping> lastMappedConfigurationPropertyName;
private LastMapping lastMappedPropertyName;
private DefaultPropertyMapper() {
}
@Override
public List map(ConfigurationPropertyName configurationPropertyName) {
// Use a local copy in case another thread changes things
LastMapping> last = this.lastMappedConfigurationPropertyName;
if (last != null && last.isFrom(configurationPropertyName)) {
return last.getMapping();
}
String convertedName = configurationPropertyName.toString();
List mapping = Collections.singletonList(convertedName);
this.lastMappedConfigurationPropertyName = new LastMapping<>(configurationPropertyName, mapping);
return mapping;
}
@Override
public ConfigurationPropertyName map(String propertySourceName) {
// Use a local copy in case another thread changes things
LastMapping last = this.lastMappedPropertyName;
if (last != null && last.isFrom(propertySourceName)) {
return last.getMapping();
}
ConfigurationPropertyName mapping = tryMap(propertySourceName);
this.lastMappedPropertyName = new LastMapping<>(propertySourceName, mapping);
return mapping;
}
private ConfigurationPropertyName tryMap(String propertySourceName) {
try {
ConfigurationPropertyName convertedName = ConfigurationPropertyName.adapt(propertySourceName, '.');
if (!convertedName.isEmpty()) {
return convertedName;
}
}
catch (Exception ex) {
}
return ConfigurationPropertyName.EMPTY;
}
private static class LastMapping {
private final T from;
private final M mapping;
LastMapping(T from, M mapping) {
this.from = from;
this.mapping = mapping;
}
boolean isFrom(T from) {
return ObjectUtils.nullSafeEquals(from, this.from);
}
M getMapping() {
return this.mapping;
}
}
}