public void performClear ( Transaction tx , Resource ... contexts ) { if ( notNull ( contexts ) ) { for ( int i = 0 ; i < contexts . length ; i ++ ) { if ( notNull ( contexts [ i ] ) ) { graphManager . delete ( contexts [ i ] . stringValue ( ) , tx ) ; } else { graphManager . delete ( DEFAULT_GRAPH_URI , tx ) ; } } } else { graphManager . delete ( DEFAULT_GRAPH_URI , tx ) ; } }
clears triples from named graph