private boolean checkValidation(final SourceDataTag currentSourceDataTag,final ValueUpdate update){
  if (!isTimestampValid(currentSourceDataTag,update)) {
    return false;
  }
  if (!isConvertible(currentSourceDataTag,update)) {
    return false;
  }
  if (isNumber(currentSourceDataTag.getDataType()) && !isInRange(currentSourceDataTag,update)) {
    return false;
  }
  return true;
}

private boolean checkValidation ( final SourceDataTag currentSourceDataTag , final ValueUpdate update ) { if ( ! isTimestampValid ( currentSourceDataTag , update ) ) { return false ; } if ( ! isConvertible ( currentSourceDataTag , update ) ) { return false ; } if ( isNumber ( currentSourceDataTag . getDataType ( ) ) && ! isInRange ( currentSourceDataTag , update ) ) { return false ; } return true ; }
helper method which validates the new tag value and triggers an invalidation in case of a problem
