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/*******************************************************************************
 * 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
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Sonatype, Inc. - initial API and implementation
 *******************************************************************************/
package shaded.shaded.org.eclipse.aether.spi.locator;

import java.util.List;

/**
 * A simple infrastructure to programmatically wire the various components of the repository system together when it is
 * used outside of an IoC container. Once a concrete implementation of a service locator has been setup, clients could
 * use
 * 
 *  * RepositorySystem repoSystem = serviceLocator.getService( RepositorySystem.class );
 * 
 * 
 * to acquire the repository system. Components that implement {@link Service} will be given an opportunity to acquire
 * further components from the locator, thereby allowing to create the complete object graph of the repository system.
 */
public interface ServiceLocator
{

    /**
     * Gets an instance of the specified service.
     * 
     * @param  The service type.
     * @param type The interface describing the service, must not be {@code null}.
     * @return The service instance or {@code null} if the service could not be located/initialized.
     */
     T getService( Class type );

    /**
     * Gets all available instances of the specified service.
     * 
     * @param  The service type.
     * @param type The interface describing the service, must not be {@code null}.
     * @return The (read-only) list of available service instances, never {@code null}.
     */
     List getServices( Class type );

}