naturalnumberbitfixer.java

来自「Java版的SAT求解器」· Java 代码 · 共 41 行

package positronic.satisfiability.naturalnumber;

/**
 * <p>Title: TBS</p>
 * <p>Description: TBS</p>
 * <p>Copyright (c) 2005</p>
 * <p>Company: Positronic Software</p>
 * @author Kerry Michael Soileau
 * @version 1.0
 */
import positronic.satisfiability.elements.BitFixer;
import positronic.satisfiability.elements.Conjunction;
import positronic.satisfiability.elements.IProblem;
import positronic.satisfiability.elements.Problem;
import positronic.satisfiability.exceptions.NaturalNumberBitFixerException;

public class NaturalNumberBitFixer extends Problem implements IProblem
{
  private static final long serialVersionUID = 1L;
  
  public NaturalNumberBitFixer(INaturalNumber b, int bit, boolean val) throws Exception
  {
  	if(b==null)
  		throw new NaturalNumberBitFixerException("Null INaturalNumber was passed to a constructor.");
  	if(bit<0 || bit>INaturalNumber.LENGTH-1)
  		throw new NaturalNumberBitFixerException("Attempt was made to index an INaturalNumber outside its range of definition.");
    BitFixer bf=new BitFixer(b.getBooleanVariable(bit),val);
    this.setClauses(((IProblem)bf).getClauses());
  }

  public NaturalNumberBitFixer(INaturalNumber b) throws Exception
  {
  	if(b==null)
  		throw new NaturalNumberBitFixerException("Null INaturalNumber was passed to a constructor.");
    BitFixer[] bf=new BitFixer[b.size()];
    for(int i=0;i<bf.length;i++)
      bf[i]=new BitFixer(b.getBooleanVariable(i));
    IProblem problem=new Conjunction(bf);
    this.setClauses(problem.getClauses());
  }
}