Class TupleSorter.TupleUnwrapper

java.lang.Object
net.sf.saxon.sort.TupleSorter.TupleUnwrapper
All Implemented Interfaces:
MappingFunction
Enclosing class:
TupleSorter

public static class TupleSorter.TupleUnwrapper extends Object implements MappingFunction
Mapping function to map the wrapped objects returned by the SortedTupleIterator into real items. This is done because each tuple may actually represent a sequence of underlying values that share the same sort key.
  • Method Details

    • getInstance

      public static TupleSorter.TupleUnwrapper getInstance()
      Get the singular instance of this class
      Returns:
      the singular instance
    • map

      public SequenceIterator map(Item item) throws XPathException
      Description copied from interface: MappingFunction
      Map one item to a sequence.
      Specified by:
      map in interface MappingFunction
      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