spring IterableConfigurationPropertySource 源码
springboot IterableConfigurationPropertySource 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/IterableConfigurationPropertySource.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.properties.source;
import java.util.Iterator;
import java.util.function.Predicate;
import java.util.stream.Stream;
import org.springframework.boot.origin.OriginTrackedValue;
import org.springframework.util.StringUtils;
/**
* A {@link ConfigurationPropertySource} with a fully {@link Iterable} set of entries.
* Implementations of this interface <strong>must</strong> be able to iterate over all
* contained configuration properties. Any {@code non-null} result from
* {@link #getConfigurationProperty(ConfigurationPropertyName)} must also have an
* equivalent entry in the {@link #iterator() iterator}.
*
* @author Phillip Webb
* @author Madhura Bhave
* @since 2.0.0
* @see ConfigurationPropertyName
* @see OriginTrackedValue
* @see #getConfigurationProperty(ConfigurationPropertyName)
* @see #iterator()
* @see #stream()
*/
public interface IterableConfigurationPropertySource
extends ConfigurationPropertySource, Iterable<ConfigurationPropertyName> {
/**
* Return an iterator for the {@link ConfigurationPropertyName names} managed by this
* source.
* @return an iterator (never {@code null})
*/
@Override
default Iterator<ConfigurationPropertyName> iterator() {
return stream().iterator();
}
/**
* Returns a sequential {@code Stream} for the {@link ConfigurationPropertyName names}
* managed by this source.
* @return a stream of names (never {@code null})
*/
Stream<ConfigurationPropertyName> stream();
@Override
default ConfigurationPropertyState containsDescendantOf(ConfigurationPropertyName name) {
return ConfigurationPropertyState.search(this, name::isAncestorOf);
}
@Override
default IterableConfigurationPropertySource filter(Predicate<ConfigurationPropertyName> filter) {
return new FilteredIterableConfigurationPropertiesSource(this, filter);
}
@Override
default IterableConfigurationPropertySource withAliases(ConfigurationPropertyNameAliases aliases) {
return new AliasedIterableConfigurationPropertySource(this, aliases);
}
@Override
default IterableConfigurationPropertySource withPrefix(String prefix) {
return (StringUtils.hasText(prefix)) ? new PrefixedIterableConfigurationPropertySource(this, prefix) : this;
}
}
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