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/*******************************************************************************
 *  Copyright (C) 2007, 2014:
 *  
 *    - Ferdinando Villa 
 *    - integratedmodelling.org
 *    - any other authors listed in @author annotations
 *
 *    All rights reserved. This file is part of the k.LAB software suite,
 *    meant to enable modular, collaborative, integrated 
 *    development of interoperable data and model components. For
 *    details, see http://integratedmodelling.org.
 *    
 *    This program is free software; you can redistribute it and/or
 *    modify it under the terms of the Affero General Public License 
 *    Version 3 or any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but without any warranty; without even the implied warranty of
 *    merchantability or fitness for a particular purpose.  See the
 *    Affero General Public License for more details.
 *  
 *     You should have received a copy of the Affero General Public License
 *     along with this program; if not, write to the Free Software
 *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *     The license is also available at: https://www.gnu.org/licenses/agpl.html
 *******************************************************************************/
package org.integratedmodelling.api.project;

import java.util.Collection;

import org.integratedmodelling.api.modelling.INamespace;

/**
 * An object dedicated to inquiring about namespace dependencies. The IProjectManager keeps one
 * up to date.
 * 
 * @author Ferd
 *
 */
public interface IDependencyGraph {

    /**
     * Return all the namespaces that depend on the passed one, recursively.
     *
     * @param ns
     * @return the namespaces that depend (directly or indirectly) from the passed one.
     */
    Collection getDependents(INamespace ns);

    /**
     * Return all the namespaces that the passed one depends on, recursively.
     * 
     * @param ns
     * @return the namespaces that the passed one depends on directly or indirectly.
     */
    Collection getPrerequisites(INamespace ns);

}