/**
* Creates a component from cache.
*
* This method unserializes a component from memory or a file.
*
* Derived classes may override this method to provide other ways of caching component.
* Be sure to override {@link cacheComponent} to make it consistent.
* @param string the type of the component to be created
* @see cacheComponent()
* @return TComponent the component created, null if failed.
*/
public function cloneComponent($type)
{
if (!$this->enabled) {
return null;
}
$id = empty($this->currentModule) ? $type : $this->currentModule . '.' . $type;
$data = null;
if (isset($this->components[$id])) {
$data = unserialize($this->components[$id]);
} else {
if (!empty($this->savePath)) {
$cacheFile = $this->savePath . '/' . $type . self::EXT_CACHE;
if (is_file($cacheFile)) {
$this->components[$id] = file_get_contents($cacheFile);
$data = unserialize($this->components[$id]);
}
}
}
if (is_array($data) && count($data) == 2) {
if ($data[1] instanceof TPage) {
TComponent::setDefinition(null, $data[0]);
} else {
TComponent::setDefinition($type, $data[0]);
}
return $data[1];
} else {
return null;
}
}
