Package net.sf.saxon.expr

Interface ContextMappingFunction

Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface 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.

  • Method Summary

    Modifier and Type
    Method
    Description
    SequenceIterator
    map(XPathContext context)
    Map one item to a sequence.

  • Method Details

    • map

      SequenceIterator map(XPathContext context) throws XPathException
      Map one item to a sequence.
      Parameters:
      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
      Returns:
      a SequenceIterator over the sequence of items that the supplied input item maps to
      Throws:
      XPathException - if a dynamic error is detected