net.sf.saxon.expr.sort
Interface SortKeyEvaluator

All Known Implementing Classes:

ForEachGroup, SortExpression, XPathExpressionImpl

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

Item	evaluateSortKey(int n, XPathContext context) Evaluate the n'th sort key of the context item

Method Detail

evaluateSortKey

Item evaluateSortKey(int n,
                     XPathContext context)
                     throws XPathException

Evaluate the n'th sort key of the context item

Throws:

XPathException