/*******************************************************************************
    * SAT4J: a SATisfiability library for Java Copyright (C) 2004, 2012 Artois University and CNRS
    *
    * All rights reserved. This program and the accompanying materials
    * are made available under the terms of the Eclipse Public License v1.0
    * which accompanies this distribution, and is available at
    *  http://www.eclipse.org/legal/epl-v10.html
    *
    * Alternatively, the contents of this file may be used under the terms of
   * either the GNU Lesser General Public License Version 2.1 or later (the
   * "LGPL"), in which case the provisions of the LGPL are applicable instead
   * of those above. If you wish to allow use of your version of this file only
   * under the terms of the LGPL, and not to allow others to use your version of
   * this file under the terms of the EPL, indicate your decision by deleting
   * the provisions above and replace them with the notice and other provisions
   * required by the LGPL. If you do not delete the provisions above, a recipient
   * may use your version of this file under the terms of the EPL or the LGPL.
   *
   * Based on the original MiniSat specification from:
   *
   * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the
   * Sixth International Conference on Theory and Applications of Satisfiability
   * Testing, LNCS 2919, pp 502-518, 2003.
   *
   * See www.minisat.se for the original solver in C++.
   *
   * Contributors:
   *   CRIL - initial API and implementation
   *******************************************************************************/
  package org.sat4j.minisat.core;
  
  import java.io.PrintWriter;
  import java.io.Serializable;
  import java.lang.reflect.Field;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Contains some statistics regarding the search.
   * 
   * @author daniel
   * 
   */
  public class SolverStats implements Serializable {
      private static final long serialVersionUID = 1L;
  
      public int starts;
  
      public long decisions;
  
      public long propagations;
  
      public long inspects;
  
      public long conflicts;
  
      public long learnedliterals;
  
      public long learnedbinaryclauses;
  
      public long learnedternaryclauses;
  
      public long learnedclauses;
  
      public long ignoredclauses;
  
      public long rootSimplifications;
  
      public long reducedliterals;
  
      public long changedreason;
  
      public int reduceddb;
  
      public int shortcuts;
  
      public long updateLBD;
  
      public int importedUnits;
  
      public void reset() {
          this.starts = 0;
          this.decisions = 0;
          this.propagations = 0;
          this.inspects = 0;
          this.shortcuts = 0;
          this.conflicts = 0;
          this.learnedliterals = 0;
          this.learnedclauses = 0;
          this.ignoredclauses = 0;
          this.learnedbinaryclauses = 0;
          this.learnedternaryclauses = 0;
          this.rootSimplifications = 0;
          this.reducedliterals = 0;
          this.changedreason = 0;
          this.reduceddb = 0;
          this.updateLBD = 0;
          this.importedUnits = 0;
      }
 
     public void printStat(PrintWriter out, String prefix) {
         out.println(prefix + "starts\t\t: " + this.starts);
         out.println(prefix + "conflicts\t\t: " + this.conflicts);
         out.println(prefix + "decisions\t\t: " + this.decisions);
         out.println(prefix + "propagations\t\t: " + this.propagations);
         out.println(prefix + "inspects\t\t: " + this.inspects);
         out.println(prefix + "shortcuts\t\t: " + this.shortcuts);
         out.println(prefix + "learnt literals\t: " + this.learnedliterals);
         out.println(prefix + "learnt binary clauses\t: "
                 + this.learnedbinaryclauses);
         out.println(prefix + "learnt ternary clauses\t: "
                 + this.learnedternaryclauses);
         out.println(prefix + "learnt constraints\t: " + this.learnedclauses);
         out.println(prefix + "ignored constraints\t: " + this.ignoredclauses);
         out.println(prefix + "root simplifications\t: "
                 + this.rootSimplifications);
         out.println(prefix + "removed literals (reason simplification)\t: "
                 + this.reducedliterals);
         out.println(prefix + "reason swapping (by a shorter reason)\t: "
                 + this.changedreason);
         out.println(prefix + "Calls to reduceDB\t: " + this.reduceddb);
         out.println(prefix + "Number of update (reduction) of LBD\t: "
                 + this.updateLBD);
         out.println(prefix + "Imported unit clauses\t: "
                 + this.importedUnits);
     }
 
     public Map<String, Number> toMap() {
         Map<String, Number> map = new HashMap<String, Number>();
         for (Field f : this.getClass().getFields()) {
             try {
                 map.put(f.getName(), (Number) f.get(this));
             } catch (IllegalArgumentException e) {
                 // ignores silently
             } catch (IllegalAccessException e) {
                 // ignores silently
             }
         }
         return map;
     }
 }