/**
* function getConnection
*
* Used to handle database connection.
* Calls AMA_DB::connect() method and returns a reference to
* the AMA_DB connection object created.
* If $this->db already stores a connection object, then simply
* return a reference to it.
*
* @return mixed $db - an AMA_DB connection object on success,
* an AMA_Error object on failure.
*/
protected function &getConnection()
{
if ($this->db === AMA_DB_NOT_CONNECTED) {
// ADALogger::log_db('Creating a new database connection '. $this->dsn);
$db =& AMA_DB::connect($this->dsn);
if (AMA_DB::isError($db)) {
$retval = new AMA_Error(AMA_ERR_DB_CONNECTION);
return $retval;
}
$this->db =& $db;
} else {
// ADALogger::log_db('Db già connesso '. $this->dsn . ' ' .$this->db->getDSN());
if ($this->dsn !== $this->db->getDSN()) {
ADALogger::log_db('dsn diverso chiusura DB ' . $this->dsn . ' ' . $this->db->getDSN());
// Close existing datababse connection
if (is_object($this->db) && method_exists($this->db, 'disconnect')) {
ADALogger::log_db('Closing open connection to database ' . $this->db->getDSN());
$this->db->disconnect();
}
// Open a new database connection
$db =& AMA_DB::connect($this->dsn);
if (AMA_DB::isError($db)) {
return new AMA_Error(AMA_ERR_DB_CONNECTION);
}
$this->db =& $db;
}
}
return $this->db;
}
