return (NetStream)((Vector)filterInStreams.get(filter)).elementAt(0);
Vector v = (Vector)filterInStreams.get(filter); if (v.size() == 0) return null; else return (NetStream)v.elementAt(0);
    public static NetStream getFilterInStream(SIRFilter filter) {    	return (NetStream)((Vector)filterInStreams.get(filter)).elementAt(0);    }