package username.genetics;

/**
 * A metric for the costs of the various changes that must be made
 * when converting one string to another.
 *
 * @author Gene Geneticist
 * @author Gena Geneticist
 * @author Samuel A. Rebelsky
 * @version 1.0 of April 2006
 */
public interface CostMetric
{
  /**
   * The cost for deleting character sc from source.
   */
  public int deleteCost(char sc);

  /**
   * The cost for inserting character tc into source.
   */
  public int insertCost(char tc);

  /**
   * The cost for changing char sc of source to char tc of target.
   */
  public int replaceCost(char sc, char tc);
} // interface CostMetric