/**
* @param ObjectiveInterface $child
*/
public function addChild(ObjectiveInterface $child)
{
$this->children->add($child);
}
/**
* @param ObjectiveInterface $objective
*/
public function addObjective(ObjectiveInterface $objective)
{
$this->objectives->add($objective);
}
/**
* @param ObjectiveInterface $child
*/
public function removeChild(ObjectiveInterface $child)
{
$this->children->removeElement($child);
}
/**
* When and objective is remove from a course it needs to remove any relationships
* to children that belong to sessions in that course
*/
public function removeObjective(ObjectiveInterface $objective)
{
if ($this->objectives->contains($objective)) {
$this->objectives->removeElement($objective);
$objective->removeCourse($this);
foreach ($this->getSessions() as $session) {
foreach ($session->getObjectives() as $sessionObjective) {
$sessionObjective->removeParent($objective);
}
}
}
}
/**
* @inheritdoc
*/
public function removeObjective(ObjectiveInterface $objective)
{
if ($this->objectives->contains($objective)) {
$this->objectives->removeElement($objective);
$objective->removeMeshDescriptor($this);
}
}
