public AbstractPathStepScalarEvaluator(IScalarEvaluator[] args, IHyracksTaskContext ctx) {
super(args);
nstb = new NodeSubTreeBuilder();
ntp = (NodeTreePointable) NodeTreePointable.FACTORY.createPointable();
seqb = new SequenceBuilder();
nodeAbvs = new ArrayBackedValueStorage();
itemTvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
node = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
}