net.sf.saxon.expr.accum

Interface IAccumulatorManager

public interface IAccumulatorManager

Definition of the class that manages accumulators dynamically. This is a marker interface (essentially, a dummy implementation for Saxon-HE which does not currently support accumulators)

Method Summary

Modifier and Type	Method and Description
boolean	isApplicable(TreeInfo tree, Accumulator accumulator) Ask whether a particular accumulator is applicable to a particular tree
void	setApplicableAccumulators(TreeInfo tree, Set<? extends Accumulator> accumulators) By default, all accumulators are applicable to any given tree.

Method Detail

setApplicableAccumulators

void setApplicableAccumulators(TreeInfo tree,
                               Set<? extends Accumulator> accumulators)

By default, all accumulators are applicable to any given tree. If this method is called, a specific set of accumulators are registered as applicable. This set may be empty.

Parameters:

tree - the document tree in question

accumulators - the set of accumulators that are appicable

isApplicable

boolean isApplicable(TreeInfo tree,
                     Accumulator accumulator)

Ask whether a particular accumulator is applicable to a particular tree

Parameters:

tree - the tree in question

accumulator - the accumulator in question

Returns:

true if the accumulator is applicable to this tree, otherwise false