Package net.sf.saxon.expr.accum

Class AccumulatorData

java.lang.Object
net.sf.saxon.expr.accum.AccumulatorData
All Implemented Interfaces:
IAccumulatorData
public class AccumulatorData extends Object implements IAccumulatorData
Holds the values of an accumulator function for one non-streamed document

  • Constructor Details

    • AccumulatorData

      public AccumulatorData(Accumulator acc)

  • Method Details

    • getAccumulator

      public Accumulator getAccumulator()
      Get the associated accumulator
      Specified by:
      getAccumulator in interface IAccumulatorData
      Returns:
      the accumulator

    • buildIndex

      public void buildIndex(NodeInfo doc, XPathContext context) throws XPathException
      Build a data structure containing the values of the accumulator for each node in a document. The data structure holds the value for all nodes where the value changes; the value for other nodes is obtained by interpolation
      Parameters:
      doc - the root of the tree for which the accumulator is to be evaluated
      context - the dynamic evaluation context
      Throws:
      XPathException - if a dynamic error occurs while evaluating the accumulator

    • getValue

      public Sequence getValue(NodeInfo node, boolean postDescent)
      Get the value of the accumulator for a given node
      Specified by:
      getValue in interface IAccumulatorData
      Parameters:
      node - the node in question
      postDescent - false if the pre-descent value of the accumulator is required; false if the post-descent value is wanted.
      Returns:
      the value of the accumulator for this node