/**
  * Return the contrains
  *
  * @param Tx_Extbase_Persistence_QueryInterface $query The filter the references must apply to
  * @param Tx_Typo3Agencies_Domain_Model_Filter $filter The filter the references must apply to
  * @return array The references
  */
 protected function getConstraints(Tx_Extbase_Persistence_QueryInterface $query, Tx_Typo3Agencies_Domain_Model_Filter $filter)
 {
     $constrains = array();
     // Special case: remove certain type of record from the result set
     $_constrains = array();
     $_constrains[] = $query->logicalNot($query->equals('first_name', ''));
     $_constrains[] = $query->logicalNot($query->equals('last_name', ''));
     $_constrains[] = $query->logicalNot($query->equals('name', ''));
     $constrains[] = $query->logicalOr($_constrains);
     // Membership case
     $members = $filter->getMembers();
     if (!empty($members)) {
         $_constrains = array();
         foreach ($members as $member) {
             $_constrains[] = $query->equals('member', $member);
         }
         $constrains[] = $query->logicalOr($_constrains);
     } else {
         // get all membershiptypes
         $constrains[] = $query->greaterThan('member', 0);
     }
     // Service case
     if ($filter->getTrainingService()) {
         $constrains[] = $query->equals('training_service', $filter->getTrainingService());
     }
     if ($filter->getHostingService()) {
         $constrains[] = $query->equals('hosting_service', $filter->getHostingService());
     }
     if ($filter->getDevelopmentService()) {
         $constrains[] = $query->equals('development_service', $filter->getDevelopmentService());
     }
     // Country case
     if ($filter->getCountry()) {
         $constrains[] = $query->equals('country', $filter->getCountry());
     }
     if ($filter->getFeUser()) {
         $constrains[] = $query->logicalOr($query->equals('administrator', $filter->getFeUser()), $query->logicalAnd($query->equals('approved', true), $query->logicalOr($query->equals('payed_until_date', 0), $query->greaterThanOrEqual('payed_until_date', time()))));
     } else {
         $constrains[] = $query->logicalAnd($query->equals('approved', true), $query->logicalOr($query->equals('payed_until_date', 0), $query->greaterThanOrEqual('payed_until_date', time())));
     }
     return $constrains;
 }