Interface EventMappingFunction

  • All Known Implementing Classes:
    ForExpression.EventMappingAction

    public interface EventMappingFunction
    EventMappingFunction is an interface that must be satisfied by an object passed to an EventMappingIterator. It represents an object which, given an Item, can return an EventIterator that delivers a sequence of zero or more PullEvents.
    • Method Detail

      • map

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