ControlTracker (Airline - IO Library 3.2.0 API)

java.lang.Object
- com.github.rvesse.airline.io.ControlTracker<T>

Type Parameters:

T - Attribute source type

Direct Known Subclasses:

OutputStreamControlTracker, WriterControlTracker
```
public abstract class ControlTracker<T>
extends Object
```
Class used to track the state of a control allowing it to be lazily written to the output only if necessary and ensuring it can be appropriately reset when necessary

Field Summary

Fields
Modifier and Type Field Description

protected ControlCodeSource<T> provider

Constructor Summary

Constructors
Constructor Description

ControlTracker(ControlCodeSource<T> provider)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`apply()`	Applies the control, if the current state of the control has not been previously applied to the stream then it will be applied now
`protected abstract void`	`applyInternal(T value)`	Method that derived classes must implement to add the actual logic for applying the control to the stream
`void`	`reset()`	Resets the control to the default unintialized state, if necessary this will will cause the
`protected abstract void`	`resetInternal(T value)`	Method that derived classes must implement to add the actual logic for resetting the control against the stream
`void`	`set(T value)`	Sets the value for the control

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

- Field Detail
  - provider
```
protected final ControlCodeSource<T> provider
```
- Constructor Detail
  - ControlTracker
```
public ControlTracker(ControlCodeSource<T> provider)
```
- Method Detail
  - set
```
public final void set(T value)
```
    Sets the value for the control
    
    Parameters:
    
    value - Value
  - reset
```
public final void reset()
                 throws IOException
```
    Resets the control to the default unintialized state, if necessary this will will cause the
    
    Throws:
    
    IOException
  - resetInternal
```
protected abstract void resetInternal(T value)
                               throws IOException
```
    Method that derived classes must implement to add the actual logic for resetting the control against the stream
    
    Parameters:
    
    value - Value to be reset from
    
    Throws:
    
    IOException
  - apply
```
public final void apply()
                 throws IOException
```
    Applies the control, if the current state of the control has not been previously applied to the stream then it will be applied now
    
    Throws:
    
    IOException
  - applyInternal
```
protected abstract void applyInternal(T value)
                               throws IOException
```
    Method that derived classes must implement to add the actual logic for applying the control to the stream
    
    Parameters:
    
    value - Value to be applied
    
    Throws:
    
    IOException