spring PropertySources 源码
spring PropertySources 代码
文件路径：/spring-core/src/main/java/org/springframework/core/env/PropertySources.java
/*
* Copyright 2002-2018 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.core.env;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import org.springframework.lang.Nullable;
/**
* Holder containing one or more {@link PropertySource} objects.
*
* @author Chris Beams
* @author Juergen Hoeller
* @since 3.1
* @see PropertySource
*/
public interface PropertySources extends Iterable<PropertySource<?>> {
/**
* Return a sequential {@link Stream} containing the property sources.
* @since 5.1
*/
default Stream<PropertySource<?>> stream() {
return StreamSupport.stream(spliterator(), false);
}
/**
* Return whether a property source with the given name is contained.
* @param name the {@linkplain PropertySource#getName() name of the property source} to find
*/
boolean contains(String name);
/**
* Return the property source with the given name, {@code null} if not found.
* @param name the {@linkplain PropertySource#getName() name of the property source} to find
*/
@Nullable
PropertySource<?> get(String name);
}
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