/**
* @param Concept $concept
* @return Arc[]
*/
public function getArcsFromConcept(Concept $concept)
{
if (is_null($this->arcCache)) {
$this->arcCache = array();
foreach ($this->getArcs() as $arc) {
/** @var $fromConcept NamespaceId */
foreach ($arc->getFromConcepts() as $fromConcept) {
if (!isset($this->arcCache[$fromConcept->namespace])) {
$this->arcCache[$fromConcept->namespace] = array();
}
if (!isset($this->arcCache[$fromConcept->namespace][$fromConcept->id])) {
$this->arcCache[$fromConcept->namespace][$fromConcept->id] = array();
}
$this->arcCache[$fromConcept->namespace][$fromConcept->id][] = $arc;
}
}
}
$namespaceArcCache = $this->arcCache[$concept->getNamespace()];
if ($namespaceArcCache) {
return $namespaceArcCache[$concept->getId()];
}
return null;
}
