net.sf.saxon.sort

Class SortedTupleIterator

java.lang.Object

net.sf.saxon.sort.SortedIterator

net.sf.saxon.sort.SortedTupleIterator

All Implemented Interfaces:

LastPositionFinder, SequenceIterator, Sortable

class SortedTupleIterator
extends SortedIterator

A SortedTupleIterator is a modified SortedIterator. Whereas the sorted iterator used by XSLT computes the sort key of each item in a sequence, using that item as the context item, the SortedTupleIterator used by XQuery precomputes the sort keys from scratch; they do not need to be a function of the item being sorted.

Field Summary

Fields inherited from class net.sf.saxon.sort.SortedIterator

base, comparators, context, count, index, nodeKeys, recordSize, sortkeys

Fields inherited from interface net.sf.saxon.om.SequenceIterator

ATOMIZABLE, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD

Constructor Summary

Constructors

Constructor and Description
SortedTupleIterator(XPathContext context, SequenceIterator base, SortKeyDefinition[] sortKeys, java.util.Comparator[] comparators)

Method Summary

Modifier and Type	Method and Description
protected void	buildArray() Override the method that builds the array of values and sort keys.

Methods inherited from class net.sf.saxon.sort.SortedIterator

compare, current, getAnother, getLastPosition, getProperties, next, position, setHostLanguage, swap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SortedTupleIterator

public SortedTupleIterator(XPathContext context,
                           SequenceIterator base,
                           SortKeyDefinition[] sortKeys,
                           java.util.Comparator[] comparators)

Method Detail

buildArray

protected void buildArray()
                   throws XPathException

Override the method that builds the array of values and sort keys.

Overrides:

buildArray in class SortedIterator

Throws:

XPathException