package org.kuali.ole.utility.callnumber;
   
   
   /**
    * Created with IntelliJ IDEA.
    * User: ?
    * Date: 20/2/13
    * Time: 7:30 PM
    * To change this template use File | Settings | File Templates.
   */
  public class DDCallNumber extends AbstractCallNumber implements CallNumber {
      private static DDCallNumber ourInstance = null;
  
      public static DDCallNumber getInstance() {
          if (null == ourInstance) {
              ourInstance = new DDCallNumber();
          }
          return ourInstance;
      }
  
      public String getSortableKey(String callNumber) {
          String normalizedCallNumber = CallNumUtils.getDeweyShelfKey(callNumber);
          return normalizedCallNumber;
      }
  
      public boolean isValid(String callNumber) {
          boolean isValid = CallNumUtils.isValidDewey(callNumber);
          if (!isValid) {
              isValid = CallNumUtils.isValidDeweyWithCutter(callNumber);
          }
          return isValid;
      }
  }