edu.mit.sketch.system.constraints
Class ArithmaticExpression

java.lang.Object
  edu.mit.sketch.system.constraints.ArithmaticExpression

Direct Known Subclasses:

AddExpression, DivExpression, IdentityExpression, MultExpression, NumberExpression, SubExpression

public abstract class ArithmaticExpression
extends java.lang.Object

Created: Tue May 28 16:59:45 2002
Copyright: Copyright (C) 2001 by MIT. All rights reserved.

Version:

$Id: ArithmaticExpression.html,v 1.3 2007-11-25 20:52:42 bpaulson Exp $

Author:

christine alvarado

Constructor Summary

ArithmaticExpression(java.util.List props)

Method Summary

abstract ArithmaticExpression	copy(java.util.Map objectBindings) Copy this ArithmaticExpression object but also copy the model properties.
boolean	equals(java.lang.Object o) Returns true if all the properties are the same and the two expressions evaluate to the same value.
double	evaluate() Perform some arithmatic operation on the values of the variables.
java.util.List	getProperties()
java.util.List	getUncalculatedProperties() Get the properties that still need values.
int	hashCode()
boolean	readyToEvaluate()
void	reset()
abstract java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ArithmaticExpression

public ArithmaticExpression(java.util.List props)

Method Detail

reset

public void reset()

getUncalculatedProperties

public java.util.List getUncalculatedProperties()

Get the properties that still need values. I think it's easiest if these properties are just mutated outside this function, rather than passing their value back in.

readyToEvaluate

public boolean readyToEvaluate()

getProperties

public java.util.List getProperties()

copy

public abstract ArithmaticExpression copy(java.util.Map objectBindings)

Copy this ArithmaticExpression object but also copy the model properties.

evaluate

public final double evaluate()

Perform some arithmatic operation on the values of the variables. This makes sure they all have values first.

toString

public abstract java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Returns true if all the properties are the same and the two expressions evaluate to the same value.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object