/**
  * If this collection has already been initialized with
  * an identical criteria, it returns the collection.
  * Otherwise if this Activitats is new, it will return
  * an empty collection; or if this Activitats has previously
  * been saved, it will retrieve related Tasquess from storage.
  *
  * This method is protected by default in order to keep the public
  * api reasonable.  You can provide public methods for those you
  * actually need in Activitats.
  */
 public function getTasquessJoinUsuarisRelatedByQuimana($criteria = null, $con = null, $join_behavior = Criteria::LEFT_JOIN)
 {
     if ($criteria === null) {
         $criteria = new Criteria(ActivitatsPeer::DATABASE_NAME);
     } elseif ($criteria instanceof Criteria) {
         $criteria = clone $criteria;
     }
     if ($this->collTasquess === null) {
         if ($this->isNew()) {
             $this->collTasquess = array();
         } else {
             $criteria->add(TasquesPeer::ACTIVITATS_ACTIVITATID, $this->activitatid);
             $this->collTasquess = TasquesPeer::doSelectJoinUsuarisRelatedByQuimana($criteria, $con, $join_behavior);
         }
     } else {
         // the following code is to determine if a new query is
         // called for.  If the criteria is the same as the last
         // one, just return the collection.
         $criteria->add(TasquesPeer::ACTIVITATS_ACTIVITATID, $this->activitatid);
         if (!isset($this->lastTasquesCriteria) || !$this->lastTasquesCriteria->equals($criteria)) {
             $this->collTasquess = TasquesPeer::doSelectJoinUsuarisRelatedByQuimana($criteria, $con, $join_behavior);
         }
     }
     $this->lastTasquesCriteria = $criteria;
     return $this->collTasquess;
 }