code: ///////////////////////////////////////////////////////////////////////////////
  // For information as to what this class does, see the Javadoc, below.       //
  // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
  // 2007, 2008, 2009, 2010, 2014, 2015 by Peter Spirtes, Richard Scheines, Joseph   //
  // Ramsey, and Clark Glymour.                                                //
  //                                                                           //
  // This program is free software; you can redistribute it and/or modify      //
  // it under the terms of the GNU General Public License as published by      //
  // the Free Software Foundation; either version 2 of the License, or         //
  // (at your option) any later version.                                       //
  //                                                                           //
  // This program is distributed in the hope that it will be useful,           //
  // but WITHOUT ANY WARRANTY; without even the implied warranty of            //
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
  // GNU General Public License for more details.                              //
  //                                                                           //
  // You should have received a copy of the GNU General Public License         //
  // along with this program; if not, write to the Free Software               //
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA //
  ///////////////////////////////////////////////////////////////////////////////
  
  package edu.cmu.tetrad.gene.tetrad.gene.graph;
  
  import edu.cmu.tetrad.gene.tetrad.gene.history.LaggedFactor;
  
  /**
   * Translates display names of lagged variables (e.g. "V1:L1") into model names
   * (e.g. "V1:1") and vice-versa.
   *
   * @author Joseph Ramsey
   */
  public final class DisplayNameHandler {
  
      /**
       * Converts the given lagged factor into a display string.
       */
      public static String getDisplayString(LaggedFactor laggedFactor) {
          return getDisplayString(laggedFactor.getFactor(),
                  laggedFactor.getLag());
      }
  
      /**
       * Uses the given factor and lag information to construct a display string.
       */
      public static String getDisplayString(String factor, int lag) {
          return factor + ":L" + lag;
      }
  
      /**
       * Parses the given string and returns the LaggedFactor it represents.
       */
      public static LaggedFactor getLaggedFactor(String displayString) {
  
          String factor = extractFactor_Display(displayString);
          int lag = extractLag_Display(displayString);
  
          return new LaggedFactor(factor, lag);
      }
  
      /**
       * Parses the given string representing a lagged factor and return the part
       * that represents the factor.
       */
      public static String extractFactor_Display(String laggedFactor) {
  
          int colonIndex = laggedFactor.indexOf(":L");
          String factor = laggedFactor.substring(0, colonIndex);
  
          return factor;
      }
  
      /**
       * Extracts the lag from the lagged factor name string. </p> precondition
       * laggedFactor is a legal lagged factor.
       *
       * @param laggedFactor the lagged factor whose lag is wanted.
       * @return the lag of this lagged factor.
       */
      public static int extractLag_Display(String laggedFactor) {
  
          int colonIndex = laggedFactor.indexOf(":L");
          int lag = Integer.parseInt(
                  laggedFactor.substring(colonIndex + 2, laggedFactor.length()));
  
          return lag;
      }
  }
  
  
  
  
  
  