net.sf.saxon.expr
Interface ContextMappingFunction
- ForEach, ForEachGroup, PathExpression, SimpleMappingExpression
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.
map
public 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