Attempts to return a concrete Hylax_Storage instance based on $driver.
| public factory ( string $driver, array $params = [] ) : Hylax_Storage | ||
| $driver | string | The type of concrete Hylax_Storage subclass to return. |
| $params | array | A hash containing any additional configuration or connection parameters a subclass might need. |
| return | Hylax_Storage | The newly created concrete Hylax_Storage instance, or false on error. |
/**
* Attempts to return a reference to a concrete Hylax_Storage instance
* based on $driver.
*
* It will only create a new instance if no Hylax_Storage instance with the
* same parameters currently exists.
*
* This should be used if multiple storage sources are required.
*
* This method must be invoked as: $var = &Hylax_Storage::singleton()
*
* @param string $driver The type of concrete Hylax_Storage subclass to
* return.
* @param array $params A hash containing any additional configuration or
* connection parameters a subclass might need.
*
* @return mixed The created concrete Hylax_Storage instance, or false on
* error.
*/
function &singleton($driver, $params = array())
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize(array($driver, $params));
if (!isset($instances[$signature])) {
$instances[$signature] =& Hylax_Storage::factory($driver, $params);
}
return $instances[$signature];
}
