/**
  * Here comes the magic, generation a where restriction out of the passed property name and the comparator
  *
  * @return string
  * @throws class_orm_exception
  */
 public function getStrWhere()
 {
     $objReflection = new class_reflection($this->getStrTargetClass());
     $strPropertyValue = $objReflection->getAnnotationValueForProperty($this->strProperty, class_orm_base::STR_ANNOTATION_TABLECOLUMN);
     if ($strPropertyValue == null) {
         throw new class_orm_exception("Failed to load annotation " . class_orm_base::STR_ANNOTATION_TABLECOLUMN . " for property " . $this->strProperty . "@" . $this->getStrTargetClass(), class_exception::$level_ERROR);
     }
     return " AND " . $strPropertyValue . " " . $this->objComparator->getEnumAsSqlString() . " ? ";
 }