Package jmri.jmrit.symbolicprog

Class ArithmeticQualifier

java.lang.Object

jmri.jmrit.symbolicprog.AbstractQualifier

jmri.jmrit.symbolicprog.ArithmeticQualifier

All Implemented Interfaces:

PropertyChangeListener, EventListener, Qualifier

Direct Known Subclasses:

JComponentQualifier, PaneQualifier, ValueQualifier

public abstract class ArithmeticQualifier
extends AbstractQualifier

Mechanism to qualify on the value of a number.

The usual arithmetic operations are possible: ge, le, gt, lt, eq, ne. The sense of this is comparing "current value" to "constant", for example "current value gt 3".

You can also check whether the value "exists" (value of 1) or not (value of 0). Comparisons with the value of a non-existent variable always fail.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ArithmeticQualifier.Test

Field Summary

Fields

Modifier and Type	Field	Description
(package private) ArithmeticQualifier.Test	test
(package private) long	value
(package private) boolean	warnedDoesntExist

Fields inherited from class jmri.jmrit.symbolicprog.AbstractQualifier

watchedVal

Constructor Summary

Constructors

Constructor	Description
ArithmeticQualifier(VariableValue watchedVal, int value, String relation)

Method Summary

Modifier and Type	Method	Description
protected boolean	availableStateFromValue(Object now)	Calculate whether a particular value for the qualifier Variable means that the qualified Object should be set Available or not.
boolean	currentDesiredState()	Does the current value of qualifier Variable means that the qualified object should be set Available or not?
void	update()	Process the current value and do whatever is needed.

Methods inherited from class jmri.jmrit.symbolicprog.AbstractQualifier

availableStateFromEvent, currentAvailableState, getWatchedVariable, processValueChangeEvent, propertyChange, setWatchedAvailable

Methods inherited from class java.lang.Object

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

Field Details

test

ArithmeticQualifier.Test test

value

long value

warnedDoesntExist

boolean warnedDoesntExist

Constructor Details

ArithmeticQualifier

public ArithmeticQualifier(VariableValue watchedVal,
 int value,
 String relation)

Method Details

currentDesiredState

public boolean currentDesiredState()

Description copied from class: AbstractQualifier

Does the current value of qualifier Variable means that the qualified object should be set Available or not?

Specified by:

currentDesiredState in interface Qualifier

Specified by:

currentDesiredState in class AbstractQualifier

Returns:

true if should be set available

availableStateFromValue

protected boolean availableStateFromValue(Object now)

Description copied from class: AbstractQualifier

Calculate whether a particular value for the qualifier Variable means that the qualified Object should be set Available or not.

Specified by:

availableStateFromValue in class AbstractQualifier

Parameters:

now - base for the calculation

Returns:

true if should be set available

update

public void update()

Description copied from interface: Qualifier

Process the current value and do whatever is needed.