Package net.sf.saxon.expr
Interface MappingFunction
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- 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.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description SequenceIterator
map(Item item)
Map one item to a sequence.
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Method Detail
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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
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