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

  • Method Details

    • evaluateSortKey

      AtomicValue evaluateSortKey(int n, XPathContext context) throws XPathException
      Evaluate the n'th sort key of the context item
      Parameters:
      n - the requested index
      context - the XPath context
      Returns:
      the evaluated sort key
      Throws:
      XPathException - if any error occurs