package salvo.jesus.graph;import java.io.*;/** * This is a non-public class the extends salvo.jesus.graph.Vistor * to check if there is a cycle from a Vertex back to itself. * * @author		Jesus M. Salvo Jr. * @see			salvo.jesus.graph.Visitor */class CycleCheckVisitor extends NullVisitor implements Serializable {  /**    * Vertex to check for a cycle path    */  Vertex	objectToCheck;  /**    * Creates a new instance of CheckCycleVisitor and specifies    * which Vertex to be checked for a cycle path    *    * @param		objectToCheck		Vertex to be checked for a cycle path    */  CycleCheckVisitor( Vertex objectToCheck ){    super();    this.objectToCheck = objectToCheck;  }  /**    * Override of superclass' visit() method. Compares the Vertex    * being visited to the Vertex we are checking for a cycle path.    * If they are the same, a cycle has been reached and false is returned.    * Otherwise, true is returned    *    * @param		objectToVisit		Vertex being visited. This is compared    * to the Vertex we are trying to check for a cycle path.    * @return	false if the Vertex being visited is the same as the    * Vertex we are trying to check for a cycle path. True otherwise.    */  public boolean visit( Vertex objectToVisit ){    if( objectToVisit == objectToCheck )      return false;    else      return true;  }}