code: //==============================================================================
  //	
  //	Copyright (c) 2015-
  //	Authors:
  //	* Joachim Klein <klein@tcs.inf.tu-dresden.de> (TU Dresden)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM is free software; you can redistribute it and/or modify
  //	it under the terms of the GNU General Public License as published by
  //	the Free Software Foundation; either version 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM 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
  //	GNU General Public License for more details.
  //	
  //	You should have received a copy of the GNU General Public License
  //	along with PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package prism;
  
  import jdd.JDDNode;
  import prism.PrismException;
  
  /**
   * Interface for a model transformation.
   */
  public interface ModelTransformation<OriginalModel extends Model, TransformedModel extends Model> {
  
  	/** Get the original model. */
  	public OriginalModel getOriginalModel();
  
  	/** Get the transformed model. */
  	public TransformedModel getTransformedModel();
  
  	/** Clear the transformed model and all other intermediate BDD information.
  	 *  Should be called when the transformation is not needed anymore. Does not clear the
  	 *  original model.
  	 */
  	public void clear();
  
  	/**
  	 * Take a {@code StateValues} object for the transformed model and
  	 * project the values to the original model.
  	 * <br>
  	 * The {@code svTransformedModel} argument is consumed/cleared and should not be
  	 * used afterwards.
  	 * @param svTransformedModel a {@code StateValues} object for the transformed model
  	 * @return a corresponding {@code StateValues} object for the original model.
  	 */
  	public StateValues projectToOriginalModel(StateValues svTransformedModel) throws PrismException;
  
  	/**
  	 * Get the transformed state set of the states of interest,
  	 * i.e., the set of states that should be calculated to allow a successful
  	 * application of the projectToOriginalModel method.
  	 *
  	 * <br>[REF: <i>result</i>]
  	 */
  	public JDDNode getTransformedStatesOfInterest();
  }
  