net.sf.saxon.expr
Class LocalVariableReference

java.lang.Object
  net.sf.saxon.expr.ComputedExpression
      net.sf.saxon.expr.VariableReference
          net.sf.saxon.expr.LocalVariableReference

All Implemented Interfaces:

java.io.Serializable, javax.xml.transform.SourceLocator, BindingReference, Container, Expression, InstructionInfoProvider

public class LocalVariableReference
extends VariableReference

Variable reference: a reference to a local variable. This subclass of VariableReference bypasses the Binding object to get the value directly from the relevant slot in the local stackframe.

See Also:

Serialized Form

Field Summary

(package private) int

slotNumber

Fields inherited from class net.sf.saxon.expr.VariableReference

binding, constantValue, displayName, staticType

Fields inherited from class net.sf.saxon.expr.ComputedExpression

locationId, staticProperties

Fields inherited from interface net.sf.saxon.expr.Expression

EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD

Constructor Summary

LocalVariableReference(int slotNumber)

Method Summary

ValueRepresentation	evaluateVariable(XPathContext c)
int	getSlotNumber()
void	refineVariableReference() Replace this VariableReference where appropriate by a more efficient implementation.

Methods inherited from class net.sf.saxon.expr.VariableReference

computeCardinality, computeSpecialProperties, copy, display, equals, evaluateItem, fixup, getBinding, getImplementationMethod, getIntrinsicDependencies, getItemType, hashCode, iterate, optimize, process, promote, setStaticType, typeCheck

Methods inherited from class net.sf.saxon.expr.ComputedExpression

adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getInstructionInfo, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, iterateSubExpressions, markTailFunctionCalls, replaceSubExpression, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, simplify, suppressValidation, typeError

Methods inherited from class java.lang.Object

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

Field Detail

slotNumber

int slotNumber

Constructor Detail

LocalVariableReference

public LocalVariableReference(int slotNumber)

Method Detail

getSlotNumber

public int getSlotNumber()

evaluateVariable

public ValueRepresentation evaluateVariable(XPathContext c)
                                     throws XPathException

Overrides:

evaluateVariable in class VariableReference

Throws:

XPathException

refineVariableReference

public void refineVariableReference()

Replace this VariableReference where appropriate by a more efficient implementation.

Overrides:

refineVariableReference in class VariableReference