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;
  
  import java.util.BitSet;
  
  /**
   * Interface for classes that provide (read) access to an explicit-state CTMC.
   */
  public interface CTMC extends DTMC
  {
  	/**
  	 * Get the exit rate for state {@code i}.
  	 * i.e. sum_j R(i,j)
  	 */
  	public double getExitRate(int i);
  	
  	/**
  	 * Compute the maximum exit rate.
  	 * i.e. max_i { sum_j R(i,j) }
  	 */
  	public double getMaxExitRate();
  	
  	/**
  	 * Compute the maximum exit rate over states in {@code subset}.
  	 * i.e. max_{i in subset} { sum_j R(i,j) }
  	 */
  	public double getMaxExitRate(BitSet subset);
  	
  	/**
  	 * Compute the default rate used to uniformise this CTMC. 
  	 */
  	public double getDefaultUniformisationRate();
  	
  	/**
  	 * Compute the default rate used to uniformise this CTMC,
  	 * assuming that all states *not* in {@code nonAbs} have been made absorbing.
  	 */
  	public double getDefaultUniformisationRate(BitSet nonAbs);
  	
  	/**
  	 * Build the embedded DTMC for this CTMC, in implicit form
  	 * (i.e. where the details are computed on the fly from this one).
  	 */
  	public DTMC buildImplicitEmbeddedDTMC();
  
  	/**
  	 * Get the embedded DTMC for this CTMC, in implicit form
  	 * (i.e. where the details are computed on the fly from this one).
  	 * <p>
  	 * If there is no cached embedded DTMC, build it and cache it.
  	 * Otherwise, return the cached one.
  	 * <p>
  	 * If the underlying CTMC has changed, build a fresh one using
  	 * buildImplicitEmbeddedDTMC, which will update the cached embedded
  	 * DTMC.
  	 */
  	public DTMC getImplicitEmbeddedDTMC();
  
  	/**
  	 * Build (a new) embedded DTMC for this CTMC.
  	 */
  	public DTMCSimple buildEmbeddedDTMC();
  
  	/**
  	 * Convert this CTMC into a uniformised CTMC.
  	 * @param q Uniformisation rate
  	 */
  	public void uniformise(double q);
  
  	/**
  	 * Build the uniformised DTMC for this CTMC, in implicit form
  	 * (i.e. where the details are computed on the fly from this one).
  	 * @param q Uniformisation rate
  	 */
  	public DTMC buildImplicitUniformisedDTMC(double q);
  
  	/**
  	 * Build (a new) uniformised DTMC for this CTMC.
  	 * @param q Uniformisation rate
  	 */
  	public DTMCSimple buildUniformisedDTMC(double q);
  
  }
  