org.lsmp.djep.xjep

Class XVariable

java.lang.Object

java.util.Observable

org.nfunk.jep.Variable

org.lsmp.djep.xjep.XVariable

Direct Known Subclasses:

DVariable, PartialDerivative

public class XVariable
extends Variable

Variables which have their equations stored.

Author:

Rich Morris Created on 28-Feb-2004

Field Summary

Fields inherited from class org.nfunk.jep.Variable

name

Constructor Summary

Constructors

Constructor and Description
XVariable(java.lang.String name)
XVariable(java.lang.String name, java.lang.Object value)

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	calcValue(XJep jep) Calculates the value for the variables equation and returns that value.
Node	getEquation() get the equation
boolean	hasEquation() Does this variable has an associated equation?
void	setEquation(Node eqn) sets the equation
java.lang.String	toString(PrintVisitor pv) Returns a string rep of variable with its equation and value.

Methods inherited from class org.nfunk.jep.Variable

getName, getValue, hasValidValue, isConstant, setIsConstant, setValidValue, setValue, setValueRaw, toString

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

XVariable

public XVariable(java.lang.String name)

XVariable

public XVariable(java.lang.String name,
         java.lang.Object value)

Method Detail

hasEquation

public boolean hasEquation()

Does this variable has an associated equation?

setEquation

public void setEquation(Node eqn)

sets the equation

getEquation

public Node getEquation()

get the equation

calcValue

public java.lang.Object calcValue(XJep jep)
                           throws java.lang.Exception

Calculates the value for the variables equation and returns that value.

Throws:

java.lang.Exception

toString

public java.lang.String toString(PrintVisitor pv)

Returns a string rep of variable with its equation and value.