org.apache.commons.jxpath.ri.compiler
Class VariableReference

java.lang.Object
  org.apache.commons.jxpath.ri.compiler.Expression
      org.apache.commons.jxpath.ri.compiler.VariableReference

public class VariableReference

extends Expression

An element of the compile tree holding a variable reference.

Version:

$Revision: 1.9 $ $Date: 2004/02/29 14:17:38 $

Author:

Dmitri Plotnikov

Nested Class Summary

Nested classes inherited from class org.apache.commons.jxpath.ri.compiler.Expression

Expression.PointerIterator, Expression.ValueIterator

Field Summary

private QName

varName

Fields inherited from class org.apache.commons.jxpath.ri.compiler.Expression

NOT_A_NUMBER, ONE, ZERO

Constructor Summary

VariableReference(QName varName)

Method Summary

java.lang.Object	compute(EvalContext context)
boolean	computeContextDependent() Implemented by subclasses and result is cached by isContextDependent()
java.lang.Object	computeValue(EvalContext context) Returns the value of the variable.
QName	getVariableName()
boolean	isContextDependent() Returns true if this expression should be re-evaluated each time the current position in the context changes.
java.lang.String	toString()

Methods inherited from class org.apache.commons.jxpath.ri.compiler.Expression

iterate, iteratePointers

Methods inherited from class java.lang.Object

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

Field Detail

varName

private QName varName

Constructor Detail

VariableReference

public VariableReference(QName varName)

Method Detail

getVariableName

public QName getVariableName()

toString

public java.lang.String toString()

isContextDependent

public boolean isContextDependent()

Description copied from class: Expression

Returns true if this expression should be re-evaluated each time the current position in the context changes.

Overrides:

isContextDependent in class Expression

computeContextDependent

public boolean computeContextDependent()

Description copied from class: Expression

Implemented by subclasses and result is cached by isContextDependent()

Specified by:

computeContextDependent in class Expression

compute

public java.lang.Object compute(EvalContext context)

Specified by:

compute in class Expression

computeValue

public java.lang.Object computeValue(EvalContext context)

Returns the value of the variable.

Specified by:

computeValue in class Expression