Package ptolemy.moml.unit

Class UnitEquation

java.lang.Object

ptolemy.moml.unit.UnitConstraint

ptolemy.moml.unit.UnitEquation

All Implemented Interfaces:

UnitPresentation

public class UnitEquation
extends UnitConstraint
implements UnitPresentation

A Unit equation is a particular type of Unit constraint, another type being a Unit inequality.

Since:

Ptolemy II 8.0

Version:

$Id$

Author:

Rowland R Johnson

Pt.AcceptedRating:

Red (rowland)

Pt.ProposedRating:

Red (rowland)

Constructor Summary

Constructors

Constructor	Description
UnitEquation(UnitExpr lhs, UnitExpr rhs)	Construct a UnitEquation from the left and right hand sides.

Method Summary

Modifier and Type	Method	Description
static boolean	areSatisfied(java.util.Vector equations)	Return true if the equations are all satisfied.
UnitEquation	canonicalize()	Transform to the canonical form of the equation.
UnitEquation	copy()	Make a copy where the left and right sides are alos copied.
boolean	isSatisfied()	Return true if this equation is satisfied.
java.lang.Object	visit(EquationVisitor visitor)	Visit this Unit equation (on the way to visiting the leaves)

Methods inherited from class ptolemy.moml.unit.UnitConstraint

descriptiveForm, getLhs, getOperator, getRhs, getSource, setLhs, setRhs, setSource, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface ptolemy.moml.unit.UnitPresentation

descriptiveForm, toString

Constructor Detail

UnitEquation

public UnitEquation(UnitExpr lhs,
                    UnitExpr rhs)

Construct a UnitEquation from the left and right hand sides.

Parameters:

lhs - The left hand side.

rhs - The right hand side.

Method Detail

areSatisfied

public static boolean areSatisfied(java.util.Vector equations)

Return true if the equations are all satisfied.

Parameters:

equations - The equations.

Returns:

True if the equations are all satisfied.

canonicalize

public UnitEquation canonicalize()

Transform to the canonical form of the equation. The canonical form of an equation is

 Ex1, Ex2, ..., Exn = A
 

where each Exi is a Unit term containing only one variable, and A is a Unit term containing one Unit and no variables.

Returns:

unitEquation The UnitEquation in canonical form.

copy

public UnitEquation copy()

Make a copy where the left and right sides are alos copied.

Returns:

The copy.

isSatisfied

public boolean isSatisfied()

Return true if this equation is satisfied.

Returns:

True if this equation is satisfied.

visit

public java.lang.Object visit(EquationVisitor visitor)
                       throws IllegalActionException

Visit this Unit equation (on the way to visiting the leaves)

Parameters:

visitor - The visitor.

Returns:

Whatever may be returned by the visitor.

Throws:

IllegalActionException - Not thrown in this base class.