content: /* 
   * Kodkod -- Copyright (c) 2005-present, Emina Torlak
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  package kodkod.engine;
  
  import kodkod.engine.fol2sat.Translation;
  
  /**
   * Stores the statistics gathered while solving
   * a given formula.
   * @specfield formula: Formula // the formula being solved
   * @specfield bounds: Bounds // the bounds on the formula
   * 
   * @modified Nuno Macedo // [HASLab] temporal model finding
   */
  public final class Statistics {
  	
  	private static final String NEW_LINE = System.getProperty("line.separator");
  	
  	// [HASLab] remove final
  	private int vars, pVars, clauses;
  	private long translation, solving; 
  	
  	/**
  	 * Constructs a new Statistics object using the provided values.
  	 */
  	public Statistics(int primaryVariables, int variables, int clauses, 
  			   long translationTime, long solvingTime) {
  		this.pVars = primaryVariables;
  		this.vars = variables;
  		this.clauses = clauses;
  		this.translation = translationTime;
  		this.solving = solvingTime;
  	}
  	
  	/**
  	 * Constructs a new Statistics object using the provided values.
  	 */
  	Statistics(Translation translation, long translationTime, long solvingTime) { 
  		this(translation.numPrimaryVariables(), translation.cnf().numberOfVariables(), 
  				translation.cnf().numberOfClauses(), translationTime, solvingTime);
  	}
  	
  	// [HASLab]
  	public void update(Translation translation, long translationTime, long solvingTime) {
  		this.pVars += translation.numPrimaryVariables();
  		this.vars += translation.cnf().numberOfVariables();
  		this.clauses += translation.cnf().numberOfClauses();
  		this.translation += translationTime;
  		this.solving += solvingTime;
  	}
  	
  	/**
  	 * Returns the number of variables needed 
  	 * to encode this.formula in CNF.
  	 * @return the number of variables needed
  	 * to encode this.formula in CNF.
  	 */
  	public int variables() {
  		return vars;
  	}
  	
  	/**
  	 * Returns the number of primary variables
  	 * used in the encoding of this.formula; i.e. the variables
  	 * allocated to all the relations at the leaves
  	 * of this.formula.
  	 * @return the number of primary variables
  	 * used in the encoding of this.formula
  	 */
  	public int primaryVariables() {
  		return pVars;
  	}
  	
  	/**
  	 * Returns the number of clauses needed to 
  	 * encode this.formula in CNF.
  	 * @return the number of variables needed
  	 * to encode this.formula in CNF.
  	 */
  	public int clauses() {
  		return clauses;
  	}
  	
  	/**
  	 * Returns the number of miliseconds spent
  	 * on translation this.formula to CNF.
  	 * @return the number of miliseconds spent
  	 * on translation this.formula to CNF.
  	 */
  	public long translationTime() {
  		return translation;
  	}
  	
  	/**
  	 * Returns the number of miliseconds spent
  	 * on solving the CNF encoding of this.formula.
  	 * @return the number of miliseconds spent
  	 * on solving the CNF encoding of this.formula.
  	 */
  	public long solvingTime() {
  		return solving;
  	}
  	
  	/**
  	 * Returns a string representation of this
  	 * Statistics object.
  	 * @return a string representation of this
  	 * Statistics object.
  	 */
  	public String toString() {
  		final StringBuilder ret = new StringBuilder();
  		ret.append("p cnf ");
  		ret.append(vars);
  		ret.append(" ");
  		ret.append(clauses);
  		ret.append(NEW_LINE);
  		ret.append("primary variables: ");
  		ret.append(pVars);
  		ret.append(NEW_LINE);
  		ret.append("translation time: ");
  		ret.append(translation);
  		ret.append(" ms").append(NEW_LINE);
  		ret.append("solving time: ");
  		ret.append(solving);
  		ret.append(" ms");
  		return ret.toString();
  	}
  }