spring UnboundElementsSourceFilter 源码
springboot UnboundElementsSourceFilter 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/UnboundElementsSourceFilter.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.HashSet;
import java.util.Set;
import java.util.function.Function;
import org.springframework.core.env.PropertySource;
import org.springframework.core.env.StandardEnvironment;
/**
* Function used to determine if a {@link ConfigurationPropertySource} should be included
* when determining unbound elements. If the underlying {@link PropertySource} is a
* systemEnvironment or systemProperties property source, it will not be considered for
* unbound element failures.
*
* @author Madhura Bhave
* @since 2.0.0
*/
public class UnboundElementsSourceFilter implements Function<ConfigurationPropertySource, Boolean> {
private static final Set<String> BENIGN_PROPERTY_SOURCE_NAMES = Collections
.unmodifiableSet(new HashSet<>(Arrays.asList(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME)));
@Override
public Boolean apply(ConfigurationPropertySource configurationPropertySource) {
Object underlyingSource = configurationPropertySource.getUnderlyingSource();
if (underlyingSource instanceof PropertySource) {
String name = ((PropertySource<?>) underlyingSource).getName();
return !BENIGN_PROPERTY_SOURCE_NAMES.contains(name);
}
return true;
}
}
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