Package jmri.jmrit.symbolicprog

Class QualifierCombiner

java.lang.Object

jmri.jmrit.symbolicprog.QualifierCombiner

All Implemented Interfaces:

PropertyChangeListener, EventListener, Qualifier

public class QualifierCombiner
extends Object
implements Qualifier, PropertyChangeListener

Force a set of Qualifiers to work in an AND relationship.

On transition, the qualifiers are evaluated in order, stopping when the outcome is known.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) List<Qualifier>	qualifiers

Constructor Summary

Constructors

Constructor	Description
QualifierCombiner(List<Qualifier> qualifiers)

Method Summary

Modifier and Type	Method	Description
boolean	currentDesiredState()	Check whether this Qualifier is currently in the OK, qualified-to-act state.
void	propertyChange(PropertyChangeEvent e)
void	setWatchedAvailable(boolean enable)	Drive the available or not state of the qualified object.
void	update()	Process the current value and do whatever is needed.

Methods inherited from class java.lang.Object

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

Field Details

qualifiers

List<Qualifier> qualifiers

Constructor Details

QualifierCombiner

public QualifierCombiner(List<Qualifier> qualifiers)

Method Details

propertyChange

public void propertyChange(PropertyChangeEvent e)

Specified by:

propertyChange in interface PropertyChangeListener

setWatchedAvailable

public void setWatchedAvailable(boolean enable)

Description copied from interface: Qualifier

Drive the available or not state of the qualified object.

Subclasses implement this to control a specific type of qualified object, like a Variable or Pane.

Specified by:

setWatchedAvailable in interface Qualifier

Parameters:

enable - true to drive, else false.

currentDesiredState

public boolean currentDesiredState()

Description copied from interface: Qualifier

Check whether this Qualifier is currently in the OK, qualified-to-act state.

Specified by:

currentDesiredState in interface Qualifier

Returns:

true if this Qualifier is currently saying OK

update

public void update()

Description copied from interface: Qualifier

Process the current value and do whatever is needed.

Specified by:

update in interface Qualifier