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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.eclipse.aether.util.repository;
import org.eclipse.aether.repository.Proxy;
import org.eclipse.aether.repository.ProxySelector;
import org.eclipse.aether.repository.RemoteRepository;
import static java.util.Objects.requireNonNull;
/**
* A proxy selector that delegates to another selector but only if a repository has no proxy yet. If a proxy has already
* been assigned to a repository, that is selected.
*/
public final class ConservativeProxySelector implements ProxySelector {
private final ProxySelector selector;
/**
* Creates a new selector that delegates to the specified selector.
*
* @param selector The selector to delegate to in case a repository has no proxy yet, must not be {@code null}.
*/
public ConservativeProxySelector(ProxySelector selector) {
this.selector = requireNonNull(selector, "proxy selector cannot be null");
}
public Proxy getProxy(RemoteRepository repository) {
requireNonNull(repository, "repository cannot be null");
Proxy proxy = repository.getProxy();
if (proxy != null) {
return proxy;
}
return selector.getProxy(repository);
}
}