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 parser.ast.Expression;
  
  /**
   * Interface for a model and expression transformation.<br>
   *
   * Implementing classes provide a combined model and expression transformation, allowing the calculation
   * of a (potentially simpler) expression in the transformed model to calculate the result of the
   * original expression in the original model.<br>
   *
   * The general idea is the following sequence of calls:<br>
   *
   * {@code ModelExpressionTransformation t = ...;}<br>
   * {@code StateValues resultTransformed = check t.getTransformedExpression() in t.getTransformedModel()}<br>
   * {@code StateValues result = t.projectToOriginalModel(resultTransformed);}
   */
  public interface ModelExpressionTransformation<OriginalModel extends Model, TransformedModel extends Model>
         extends ModelTransformation<OriginalModel, TransformedModel> {
  
  	/** Get the transformed expression. */
  	public Expression getTransformedExpression();
  
  	/** Get the original expression. */
  	public Expression getOriginalExpression();
  
  }
  