/**
* Load model definition from cache if exists; if not, build model
*/
protected function loadDefinition()
{
$cache = PerfORMController::getCache();
$cacheKey = $this->getCacheKey();
if (isset($cache[$cacheKey]) and is_object($cache[$cacheKey]) and get_class($cache[$cacheKey]) == get_class($this)) {
foreach ($cache[$cacheKey]->getProperties() as $property => $value) {
$this->{$property} = $value;
}
} else {
$this->buildDefinition();
}
}
