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/*******************************************************************************
 *  Copyright (C) 2007, 2015:
 *  
 *    - 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.modelling;

import org.integratedmodelling.api.data.IRankingScale;

/**
 * Rankings are numerically ordered, linear quantification of a value that has no further
 * unit of measurement. The type returned by getStateType() will determine whether it's
 * a discrete or continuous ranking.
 *  
 * @author Ferd
 *
 */
public interface IRankingObserver extends INumericObserver, IMediatingObserver {

    /**
     * A ranking may or may not be bound to a specific ranking scale. Those without a
     * scale cannot mediate.
     * 
     * @return the ranking scale if defined, or null
     */
    public abstract IRankingScale getRankingScale();
    
    /**
     * If the ranking is declared to be integer, only integer values are allowed
     * for it.
     * 
     * @return
     */
    public boolean isInteger();

}