AbstractStaticDrivenValue

java.lang.Object
- com.inductiveautomation.perspective.gateway.driven.AbstractStaticDrivenValue<T>

Type Parameters:

T - The type of the static value

All Implemented Interfaces:

DrivenValue<T>
```
public class AbstractStaticDrivenValue<T>
extends java.lang.Object
implements DrivenValue<T>
```
An AbstractStaticDrivenValue is a DrivenValue which never changes. Therefore, it is always ready and never dirty.

Constructor Summary

Constructors
Constructor Description

AbstractStaticDrivenValue(T value)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.util.Optional<T>`	`getAndClear()`	Fetch the current driven value
`boolean`	`isDirty()`
`boolean`	`isReady()`
`void`	`shutdown()`	Lifecycle hook to shut down the driven value
`void`	`startup()`	Lifecycle hook to start up the driven value

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractStaticDrivenValue
```
public AbstractStaticDrivenValue(@Nullable
                                 T value)
```
- Method Detail
  - startup
```
public void startup()
```
    Description copied from interface: DrivenValue
    
    Lifecycle hook to start up the driven value
    
    Specified by:
    
    startup in interface DrivenValue<T>
  - shutdown
```
public void shutdown()
```
    Description copied from interface: DrivenValue
    
    Lifecycle hook to shut down the driven value
    
    Specified by:
    
    shutdown in interface DrivenValue<T>
  - isReady
```
public boolean isReady()
```
    Specified by:
    
    isReady in interface DrivenValue<T>
    
    Returns:
    
    true if the driven value is ready to fetch
  - isDirty
```
public boolean isDirty()
```
    Specified by:
    
    isDirty in interface DrivenValue<T>
    
    Returns:
    
    true if the driven value has changed since the last time it was fetched
  - getAndClear
```
@Nonnull
public java.util.Optional<T> getAndClear()
```
    Description copied from interface: DrivenValue
    
    Fetch the current driven value
    
    Specified by:
    
    getAndClear in interface DrivenValue<T>
    
    Returns:
    
    An Optional containing the current driven value, if present, or an empty Optional if the driven value is null / not present.