/**
* Get connection
*
* Returns a database connection. If the connection is not established, uses
* options provided to establish one.
*
* @throws AeSessionDriverDatabaseException #400 if database options are
* invalid
*
* @return AeInterface_Database
*/
public function getConnection()
{
if ($this->_connection instanceof AeInterface_Database && !$this->_connection->isConnected()) {
// *** The connection is lost, try to reestablish it
$this->_connection = null;
}
if (!$this->_connection instanceof AeInterface_Database) {
// *** Establish connection first
if ($this->_options instanceof AeArray) {
// *** An array of settings
if (isset($this->_options['name'])) {
// *** Connection name and settings file path assumed
$this->_connection = AeDatabase::getConnection($this->_options['name'], $this->_options['settings']);
} else {
if (isset($this->_options['driver'])) {
// *** Connection options array assumed
$this->_connection = AeDatabase::getInstance($this->_options['driver'], $this->_options['username'], $this->_options['password'], $this->_options['options']->value);
} else {
// *** Invalid options array
throw new AeSessionDriverDatabaseException('Invalid database connection options', 400);
}
}
} else {
if ($this->_options instanceof AeCallback) {
// *** A callback
$this->_connection = $this->_options->call();
if (!$this->_connection instanceof AeInterface_Database) {
// *** Invalid callback return value
throw new AeSessionDriverDatabaseException('Invalid database connection options', 400);
}
} else {
// *** Invalid options value
throw new AeSessionDriverDatabaseException('Invalid database connection options', 400);
}
}
}
return $this->_connection;
}
public static function getInstance($class, AeInterface_Database $database)
{
if (!$database->isConnected()) {
throw new AeOrmModelException('Database connection must be established first', 401);
}
if (!is_subclass_of($class, 'AeOrm_Model')) {
throw new AeOrmModelException('Class must be a subclass of AeOrm_Model', 405);
}
static $models = array();
$key = md5($database->getClass() . $class);
if (!isset($models[$key])) {
$models[$key] = new $class($database);
}
return $models[$key];
}