ArithmeticQualifier (JMRI API)

java.lang.Object
- jmri.jmrit.symbolicprog.AbstractQualifier
- - jmri.jmrit.symbolicprog.ArithmeticQualifier

All Implemented Interfaces:

java.beans.PropertyChangeListener, java.util.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 class 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, java.lang.String relation)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected boolean`	`availableStateFromValue(java.lang.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 Detail
  - test
```
ArithmeticQualifier.Test test
```
  - value
```
long value
```
  - warnedDoesntExist
```
boolean warnedDoesntExist
```
- Constructor Detail
  - ArithmeticQualifier
```
public ArithmeticQualifier(VariableValue watchedVal,
                           int value,
                           java.lang.String relation)
```
- Method Detail
  - 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(java.lang.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.