TupleSorter.TupleUnwrapper

java.lang.Object
- net.sf.saxon.sort.TupleSorter.TupleUnwrapper

All Implemented Interfaces:

MappingFunction

Enclosing class:

TupleSorter
```
public static class TupleSorter.TupleUnwrapper
extends java.lang.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 Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static TupleSorter.TupleUnwrapper`	`getInstance()`	Get the singular instance of this class
`SequenceIterator`	`map(Item item)`	Map one item to a sequence.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - 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