Interface ContextMappingFunction

  • All Known Implementing Classes:
    AnalyzeMappingFunction, CompiledContextMappingFunction
    Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

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

    This is a specialization of the more general MappingFunction class: it differs in that each item being processed becomes the context item while it is being processed.

    NOTE: because this class is converted to a delegate in C#, it should not be subclassed; it should only be implemented by lambda expressions. This restriction does not apply to bytecode generation, which is not converted to C#.

    • Method Detail

      • map

        SequenceIterator map​(XPathContext context)
                      throws XPathException
        Map one item to a sequence.
        context - The processing context. The item to be mapped is the context item identified from this context: the values of position() and last() also relate to the set of items being mapped
        a SequenceIterator over the sequence of items that the supplied input item maps to
        XPathException - if a dynamic error is detected