code: public boolean validateLocationMode(LocationMode mode) {
          switch (mode) {
              case PRIMARY_ONLY:
                  return this.primaryUri != null;
  
              case SECONDARY_ONLY:
                  return this.secondaryUri != null;
  
              default:
                  return (this.primaryUri != null) && (this.secondaryUri != null);
          }
      }
docs: Validate that a URI exists for the specified <code>{@link LocationMode}</code>.
  
  @param mode
  The <code>LocationMode</code> to validate.
  
  @return
  <code>true</code> if a URI exists for the specified mode; otherwise <code>false</code>.