net.sf.saxon.expr.sort

Interface SortKeyEvaluator

All Known Implementing Classes:

ForEachGroup, SortExpression

public interface SortKeyEvaluator

Callback interface used to evaluate sort keys. An instance of this class is passed to the SortedIterator, and is used whenever a sort key value needs to be computed.

Method Summary

Modifier and Type	Method and Description
AtomicValue	evaluateSortKey(int n, XPathContext context) Evaluate the n'th sort key of the context item

Method Detail

evaluateSortKey

AtomicValue evaluateSortKey(int n,
                            XPathContext context)
                     throws XPathException

Evaluate the n'th sort key of the context item

Throws:

XPathException