/**
* Actually processes a variable by consulting epManager
* @param string $alias the starting alias for a variable
* @param array $parts the array of attributes for the variable
* @return false|array
* @throws epExceptionQueryBuilder
*/
protected function _processVariable($node, $alias, $parts)
{
// get class name for alias
if (!($class = $this->aliases[$alias])) {
throw new epExceptionQueryBuilder($this->_e('Class for alias [' . $alias . '] not found', $node));
return false;
}
// get class map
if (!($cm = $this->em->getMap($class))) {
throw new epExceptionQueryBuilder($this->_e('Class [' . $class . '] not found', $node));
return false;
}
// go through each var
$fms = array();
foreach ($parts as $part) {
// make sure we have class map
if (!$cm) {
throw new epExceptionQueryBuilder($this->_e('Variable [' . $class . '::' . $part . '] not existing', $node));
return false;
}
// fake a fieldmap if part is 'oid'
if ($part == 'oid') {
$fm = new epFieldMapPrimitive('oid', epFieldMap::DT_INTEGER, array(), $cm);
$fm->setColumnName($cm->getOidColumn());
} else {
if (!($fm = $cm->getField($part))) {
throw new epExceptionQueryBuilder($this->_e('Variable [' . $class . '::' . $part . '] not existing', $node));
return false;
}
}
// collect this field map
$fms[] = $fm;
// must be a relationship field map
$cm = null;
if ($fm instanceof epFieldMapRelationship) {
$cm = $this->em->getClassMap($fm->getClass());
$class = $cm->getName();
}
}
return $fms;
}
/**
* Implements magic method __wakeup()
* Recovers cached manager and class map
*/
public function __wakeup()
{
// recover manager when waking up
$this->ep_m = epManager::instance();
// recover class map
$this->ep_cm = $this->ep_m->getMap(get_class($this->ep_object));
// cache this object in manager (important for flush)
$this->ep_m->cache($this, true);
// true: force replace
}
