Package net.sf.saxon.expr.elab

Class IndexedVariableEvaluator

java.lang.Object

net.sf.saxon.expr.elab.IndexedVariableEvaluator

All Implemented Interfaces:

SequenceEvaluator

public class IndexedVariableEvaluator
extends Object
implements SequenceEvaluator

Evaluator for a variable that needs to be indexed, because the optimizer has identified that it will contain a sequence that is accessed using predicates based on the content Note, indexing is only used in Saxon-EE; the implementation in Saxon-HE is a dummy.

Constructor Summary

Constructors

Constructor	Description
IndexedVariableEvaluator(PullEvaluator select)

Method Summary

Modifier and Type	Method	Description
Sequence	evaluate(XPathContext context)	Evaluate a construct to produce a value (which might be a lazily evaluated Sequence)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

IndexedVariableEvaluator

public IndexedVariableEvaluator(PullEvaluator select)

Method Details

evaluate

public Sequence evaluate(XPathContext context)
                  throws XPathException

Evaluate a construct to produce a value (which might be a lazily evaluated Sequence)

Specified by:

evaluate in interface SequenceEvaluator

Parameters:

context - the evaluation context

Returns:

a Sequence (not necessarily grounded)

Throws:

XPathException - if a dynamic error occurs during the evaluation.