question: private void loadBinary ( DataInputStream is ) throws IOException { if ( is . readInt ( ) != MAGIC ) { throw new Error ( "Bad magic in db" ) ; } if ( is . readInt ( ) != VERSION ) { throw new Error ( "Bad VERSION in db" ) ; } continuityWeight = is . readInt ( ) ; optimalCoupling = is . readInt ( ) ; extendSelections = is . readInt ( ) ; joinMethod = is . readInt ( ) ; joinWeightShift = is . readInt ( ) ; int weightLength = is . readInt ( ) ; joinWeights = new int [ weightLength ] ; for ( int i = 0 ; i < joinWeights . length ; i ++ ) { joinWeights [ i ] = is . readInt ( ) ; } int unitsLength = is . readInt ( ) ; units = new DatabaseClusterUnit [ unitsLength ] ; for ( int i = 0 ; i < units . length ; i ++ ) { units [ i ] = new DatabaseClusterUnit ( is ) ; } int unitTypesLength = is . readInt ( ) ; unitTypes = new UnitType [ unitTypesLength ] ; for ( int i = 0 ; i < unitTypes . length ; i ++ ) { unitTypes [ i ] = new UnitType ( is ) ; } sts = new SampleSet ( is ) ; mcep = new SampleSet ( is ) ; int numCarts = is . readInt ( ) ; cartMap = new HashMap ( ) ; for ( int i = 0 ; i < numCarts ; i ++ ) { String name = Utilities . getString ( is ) ; CART cart = CARTImpl . loadBinary ( is ) ; cartMap . put ( name , cart ) ; if ( defaultCart == null ) { defaultCart = cart ; } } }
target:  Loads the database from the given input stream.