protected function initializeBundles()
{
// init bundles
$this->bundles = array();
$topMostBundles = array();
$directChildren = array();
foreach ($this->registerBundles() as $bundle) {
$name = $bundle->getName();
if (isset($this->bundles[$name])) {
throw new \LogicException(sprintf('Trying to register two bundles with the same name "%s"', $name));
}
$this->bundles[$name] = $bundle;
if ($parentName = $bundle->getParent()) {
if (isset($directChildren[$parentName])) {
throw new \LogicException(sprintf('Bundle "%s" is directly extended by two bundles "%s" and "%s".', $parentName, $name, $directChildren[$parentName]));
}
if ($parentName == $name) {
throw new \LogicException(sprintf('Bundle "%s" can not extend itself.', $name));
}
$directChildren[$parentName] = $name;
} else {
$topMostBundles[$name] = $bundle;
}
}
// look for orphans
if (count($diff = array_values(array_diff(array_keys($directChildren), array_keys($this->bundles))))) {
throw new \LogicException(sprintf('Bundle "%s" extends bundle "%s", which is not registered.', $directChildren[$diff[0]], $diff[0]));
}
// inheritance
$this->bundleMap = array();
foreach ($topMostBundles as $name => $bundle) {
$bundleMap = array($bundle);
$hierarchy = array($name);
while (isset($directChildren[$name])) {
$name = $directChildren[$name];
array_unshift($bundleMap, $this->bundles[$name]);
$hierarchy[] = $name;
}
foreach ($hierarchy as $bundle) {
$this->bundleMap[$bundle] = $bundleMap;
array_pop($bundleMap);
}
}
}