public static final boolean isValidExpression(@Nonnull String value){
  boolean ret=StringUtils.isNotBlank(value);
  if (ret) {
    try {
      evaluateExpression(value,TEST_VALUE,TEST_VALUE,TEST_VALUE);
    }
 catch (    Exception e) {
      ret=false;
    }
  }
  return ret;
}

public static final boolean isValidExpression ( @ Nonnull String value ) { boolean ret = StringUtils . isNotBlank ( value ) ; if ( ret ) { try { evaluateExpression ( value , TEST_VALUE , TEST_VALUE , TEST_VALUE ) ; } catch ( Exception e ) { ret = false ; } } return ret ; }
checks to see if the expressin is valid .
