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

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

public class Constant

extends Expression

A compile tree element containing a constant number or string.

Version:

$Revision: 1.8 $ $Date: 2004/02/29 14:17:39 $

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 java.lang.Object

value

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

NOT_A_NUMBER, ONE, ZERO

Constructor Summary

Constant(java.lang.Number number)

Constant(java.lang.String string)

Method Summary

java.lang.Object	compute(EvalContext context)
boolean	computeContextDependent() Returns false
java.lang.Object	computeValue(EvalContext context) Returns the value of the constant.
boolean	isContextDependent() Returns false
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

value

private java.lang.Object value

Constructor Detail

Constant

public Constant(java.lang.Number number)

Constant

public Constant(java.lang.String string)

Method Detail

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 constant.

Specified by:

computeValue in class Expression

isContextDependent

public boolean isContextDependent()

Returns false

Overrides:

isContextDependent in class Expression

computeContextDependent

public boolean computeContextDependent()

Returns false

Specified by:

computeContextDependent in class Expression

toString

public java.lang.String toString()