code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	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 explicit.rewards;
  
  import explicit.Model;
  import explicit.Product;
  
  /**
   * Explicit-state storage of constant state rewards.
   */
  public class StateRewardsConstant extends StateRewards
  {
  	protected double stateReward = 0.0;
  
  	/**
  	 * Constructor: all rewards equal to {@code r}
  	 */
  	public StateRewardsConstant(double r)
  	{
  		stateReward = r;
  	}
  
  	// Accessors
  
  	@Override
  	public double getStateReward(int s)
  	{
  		return stateReward;
  	}
  
  	// Converters
  	
  	@Override
  	public StateRewards liftFromModel(Product<? extends Model> product)
  	{
  		return deepCopy();
  	}
  	
  	// Other
  
  	@Override
  	public StateRewardsConstant deepCopy()
  	{
  		return new StateRewardsConstant(stateReward);
  	}
  }
  