package org.sonatype.aether.util.repository;
/*******************************************************************************
* Copyright (c) 2010-2011 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* The Apache License v2.0 is available at
* http://www.apache.org/licenses/LICENSE-2.0.html
* You may elect to redistribute this code under either of these licenses.
*******************************************************************************/
import org.sonatype.aether.repository.Proxy;
import org.sonatype.aether.repository.ProxySelector;
import org.sonatype.aether.repository.RemoteRepository;
/**
* 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.
*
* @author Benjamin Bentmann
*/
public 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 )
{
if ( selector == null )
{
throw new IllegalArgumentException( "no proxy selector specified" );
}
this.selector = selector;
}
public Proxy getProxy( RemoteRepository repository )
{
Proxy proxy = repository.getProxy();
if ( proxy != null )
{
return proxy;
}
return selector.getProxy( repository );
}
}