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.
evaluateSortKey
AtomicValue evaluateSortKey(int n,
XPathContext context)
throws XPathException
- Evaluate the n'th sort key of the context item
- Throws:
XPathException
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