com.reger.dubbo.config.CompositePropertySources Maven / Gradle / Ivy
/*
* Copyright 2012-2017 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
*
* http://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 com.reger.dubbo.config;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
import org.springframework.core.env.PropertySource;
import org.springframework.core.env.PropertySources;
/**
* A composite {@link PropertySources} backed by one or more {@code PropertySources}.
* Changes to the backing {@code PropertySources} are automatically reflected in the
* composite.
*
* @author Andy Wilkinson
*/
final class CompositePropertySources implements PropertySources {
private final List propertySources;
CompositePropertySources(PropertySources... propertySources) {
this.propertySources = Arrays.asList(propertySources);
}
@Override
public Iterator> iterator() {
return this.propertySources.stream()
.flatMap((sources) -> StreamSupport.stream(sources.spliterator(), false))
.collect(Collectors.toList()).iterator();
}
@Override
public boolean contains(String name) {
for (PropertySources sources : this.propertySources) {
if (sources.contains(name)) {
return true;
}
}
return false;
}
@Override
public PropertySource get(String name) {
for (PropertySources sources : this.propertySources) {
PropertySource source = sources.get(name);
if (source != null) {
return source;
}
}
return null;
}
}