package org.lsst.ccs.config;
   
   import java.util.Comparator;
   
   /**
    * Two objects with the same ParameterPath are unique in their category.
    * The method would be used to fetch an object in a <TT>Set</TT>
    * using another <TT>PathObject</TT>
    */
  public interface PathObject {
      public static final Comparator<PathObject> COMPARATOR = new Comparator<PathObject>() {
          @Override
          public int compare(PathObject pathObject, PathObject otherPathObject) {
              String pathString = pathObject.getPath().toString() ;
              String otherPathString = otherPathObject.getPath().toString() ;
              if(pathString.startsWith("main/") && ! otherPathString.startsWith("main/")) {
                  return -1 ;
              }
              if(otherPathString.startsWith("main/") && ! pathString.startsWith("main/")) {
                  return 1 ;
              }
              return pathString.compareTo(otherPathString);
          }
      } ;
      public ParameterPath getPath() ;
  }