Interface MappingFunction

  • All Known Subinterfaces:
    StatefulMappingFunction
    All Known Implementing Classes:
    Atomizer.AtomizingFunction, TupleSorter.TupleUnwrapper

    public interface MappingFunction
    MappingFunction is an interface that must be satisfied by an object passed to a MappingIterator. It represents an object which, given an Item, can return a SequenceIterator that delivers a sequence of zero or more Items.
    • Method Detail

      • map

        SequenceIterator map​(Item item)
                      throws XPathException
        Map one item to a sequence.
        Parameters:
        item - The item to be mapped.
        Returns:
        one of the following: (a) a SequenceIterator over the sequence of items that the supplied input item maps to, or (b) null if it maps to an empty sequence.
        Throws:
        XPathException