/**
  * Triggers the update sequence for assignment properties
  * @return bool
  */
 private function updateAssignments()
 {
     $bitReturn = true;
     $objReflection = new class_reflection($this->getObjObject());
     //get the mapped properties
     $arrProperties = $objReflection->getPropertiesWithAnnotation(class_orm_base::STR_ANNOTATION_OBJECTLIST, class_reflection_enum::PARAMS());
     foreach ($arrProperties as $strPropertyName => $arrValues) {
         $objCfg = class_orm_assignment_config::getConfigForProperty($this->getObjObject(), $strPropertyName);
         //try to load the orm config of the arrayObject - if given
         $strGetter = $objReflection->getGetter($strPropertyName);
         $arrValues = null;
         if ($strGetter !== null) {
             $arrValues = call_user_func(array($this->getObjObject(), $strGetter));
         }
         $objAssignmentDeleteHandling = $this->getIntCombinedLogicalDeletionConfig();
         if ($arrValues != null && $arrValues instanceof class_orm_assignment_array) {
             $objAssignmentDeleteHandling = $arrValues->getObjDeletedHandling();
         }
         //try to restore the object-set from the database using the same config as when initializing the object
         $objOldHandling = $this->getIntCombinedLogicalDeletionConfig();
         $this->setObjHandleLogicalDeleted($objAssignmentDeleteHandling);
         $arrAssignmentsFromObject = $this->getAssignmentValuesFromObject($strPropertyName, $objCfg->getArrTypeFilter());
         $arrAssignmentsFromDatabase = $this->getAssignmentsFromDatabase($strPropertyName);
         $this->setObjHandleLogicalDeleted($objOldHandling);
         //if the delete handling was set to excluded when loading the assignment, the logically deleted nodes should be merged with the values from db
         if ($objAssignmentDeleteHandling->equals(class_orm_deletedhandling_enum::EXCLUDED())) {
             $this->setObjHandleLogicalDeleted(class_orm_deletedhandling_enum::EXCLUSIVE());
             $arrDeletedIds = $this->getAssignmentsFromDatabase($strPropertyName);
             $this->setObjHandleLogicalDeleted($objOldHandling);
             foreach ($arrDeletedIds as $strOneId) {
                 if (!in_array($strOneId, $arrAssignmentsFromDatabase)) {
                     $arrAssignmentsFromDatabase[] = $strOneId;
                 }
                 if (!in_array($strOneId, $arrAssignmentsFromObject)) {
                     $arrAssignmentsFromObject[] = $strOneId;
                 }
             }
         }
         sort($arrAssignmentsFromObject);
         sort($arrAssignmentsFromDatabase);
         //only do s.th. if the array differs
         $arrNewAssignments = array_diff($arrAssignmentsFromObject, $arrAssignmentsFromDatabase);
         $arrDeletedAssignments = array_diff($arrAssignmentsFromDatabase, $arrAssignmentsFromObject);
         //skip in case there's nothing to do
         if (count($arrNewAssignments) == 0 && count($arrDeletedAssignments) == 0) {
             continue;
         }
         $objDB = class_carrier::getInstance()->getObjDB();
         $arrInserts = array();
         foreach ($arrAssignmentsFromObject as $strOneTargetId) {
             $arrInserts[] = array($this->getObjObject()->getSystemid(), $strOneTargetId);
         }
         $bitReturn = $bitReturn && $objDB->_pQuery("DELETE FROM " . $objDB->encloseTableName(_dbprefix_ . $objCfg->getStrTableName()) . " WHERE " . $objDB->encloseColumnName($objCfg->getStrSourceColumn()) . " = ?", array($this->getObjObject()->getSystemid()));
         $bitReturn = $bitReturn && $objDB->multiInsert($objCfg->getStrTableName(), array($objCfg->getStrSourceColumn(), $objCfg->getStrTargetColumn()), $arrInserts);
         $bitReturn = $bitReturn && class_core_eventdispatcher::getInstance()->notifyGenericListeners(class_system_eventidentifier::EVENT_SYSTEM_OBJECTASSIGNMENTSUPDATED, array(array_values($arrNewAssignments), array_values($arrDeletedAssignments), array_values($arrAssignmentsFromObject), $this->getObjObject(), $strPropertyName));
         if ($objReflection->hasPropertyAnnotation($strPropertyName, class_module_system_changelog::ANNOTATION_PROPERTY_VERSIONABLE)) {
             $objChanges = new class_module_system_changelog();
             $objChanges->setOldValueForSystemidAndProperty($this->getObjObject()->getSystemid(), $strPropertyName, implode(",", $arrAssignmentsFromDatabase));
         }
     }
     return $bitReturn;
 }