private void close() throws PersistenceException {
try {
if (this.connection != null && !this.connection.isClosed()) {
ConnectionProvider.getInstance().closeConnection();
this.connection = null;
}
} catch (SQLException sqlException) {
throw new PersistenceException(sqlException);
}
}
public Connection getConnection() throws PersistenceException {
try {
if (this.connection == null || this.connection.isClosed()) {
this.connection = ConnectionProvider.getInstance().getConnection();
}
} catch (SQLException sqlException) {
throw new PersistenceException(sqlException);
}
return this.connection;
}
