ptolemy.moml.unit

Class ExpandPortNames

java.lang.Object

ptolemy.moml.unit.EquationVisitor

ptolemy.moml.unit.ExpandPortNames

public class ExpandPortNames
extends EquationVisitor

Visit a UnitEquation and for each contained variable that represents a port substitute it with a variable that represents the port from the perspective of the model that contains the actor that contains the port. For example, the variable representing the value of the plus port of an actor named AddSubtract22 would originally have the variable label plus which would be substituted with AddSubtract22.plus. The reason for doing this is that a ComponentEntity will have constraints on units specified as a set of UnitEquations. Within each UnitEquation a variable of the form $PortName is used to represent the Unit value at that port. Since a CompositeEntity will have several ComponentEntities, each with a set of ports, it is possible that port names will be duplicated.

Since:

Ptolemy II 8.0

Author:

Rowland R Johnson

Pt.AcceptedRating:

Red (rowland)

Pt.ProposedRating:

Red (rowland)

Constructor Summary

Constructors

Constructor and Description
ExpandPortNames()

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	_visitUnitTerm(UnitTerm uTerm) The method that actually does the substitution of a variable with the model name of the port.
void	expand(UnitEquation equation, ComponentEntity actor) The method is the entry point to the class.

Methods inherited from class ptolemy.moml.unit.EquationVisitor

_visitUnitEquation, _visitUnitExpr

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpandPortNames

public ExpandPortNames()

Method Detail

expand

public void expand(UnitEquation equation,
                   ComponentEntity actor)
            throws IllegalActionException

The method is the entry point to the class.

Parameters:

equation - The UnitEquation to be visited.

actor - The ComponentEntity that contains ports that may be referenced in the equation.

Throws:

IllegalActionException

_visitUnitTerm

protected java.lang.Object _visitUnitTerm(UnitTerm uTerm)
                                   throws IllegalActionException

The method that actually does the substitution of a variable with the model name of the port.

Overrides:

_visitUnitTerm in class EquationVisitor

Parameters:

uTerm - The UnitTerm to visit.

Returns:

Null, can be overridden in a concrete visitor.

Throws:

IllegalActionException - Not thrown in this base class.

See Also:

EquationVisitor._visitUnitTerm(UnitTerm)