org.eclipse.core.databinding.observable.value
Class WritableValue

java.lang.Object
  

org.eclipse.core.databinding.observable.AbstractObservable
      

org.eclipse.core.databinding.observable.value.AbstractObservableValue
          
org.eclipse.core.databinding.observable.value.WritableValue

All Implemented Interfaces:

IObservable, IObservableValue

public class WritableValue
extends 
AbstractObservableValue

Mutable (writable) implementation of IObservableValue that will maintain a value and fire change events when the value changes.

This class is thread safe. All state accessing methods must be invoked from the current realm. Methods for adding and removing listeners may be invoked from any thread.

Since:

1.0

Constructor Summary
WritableValue ()           Constructs a new instance with the default realm, a null value type, and a null value.
WritableValue ( Object initialValue, Object valueType)           Constructs a new instance with the default realm.
WritableValue ( Realm realm)           Constructs a new instance with the provided realm, a null value type, and a null initial value.
WritableValue ( Realm realm, Object initialValue, Object valueType)           Constructs a new instance.

 

Method Summary
protected  void	addListener ( Object listenerType, IObservablesListener listener)
protected   Object	clone ()
Object	doGetValue ()
void	doSetValue ( Object value)           Template method for setting the value of the observable.
protected  void	fireEvent ( ObservableEvent event)
protected  void	firstListenerAdded ()
Realm	getRealm ()
Object	getValueType ()           The value type of this observable value, or null if this observable value is untyped.
protected  boolean	hasListeners ()
protected  void	lastListenerRemoved ()
protected  void	removeListener ( Object listenerType, IObservablesListener listener)
static  WritableValue	withValueType ( Object elementType)

 

Methods inherited from class org.eclipse.core.databinding.observable.value. AbstractObservableValue
addValueChangeListener, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue

 

Methods inherited from class org.eclipse.core.databinding.observable. AbstractObservable
addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener

 

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

 

Methods inherited from interface org.eclipse.core.databinding.observable. IObservable
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener

 

Constructor Detail

WritableValue

public WritableValue()

Constructs a new instance with the default realm, a null value type, and a null value.

WritableValue

public WritableValue(
Object initialValue,
                     
Object valueType)

Constructs a new instance with the default realm.

Parameters:

initialValue - can be null

valueType - can be null

WritableValue

public WritableValue(
Realm realm)

Constructs a new instance with the provided realm, a null value type, and a null initial value.

Parameters:

realm -

WritableValue

public WritableValue(
Realm realm,
                     
Object initialValue,
                     
Object valueType)

Constructs a new instance.

Parameters:

realm -

initialValue - can be null

valueType - can be null

doGetValue

public 
Object doGetValue()

Specified by:

doGetValue in class AbstractObservableValue

doSetValue

public void doSetValue(
Object value)

Description copied from class: AbstractObservableValue

Template method for setting the value of the observable. By default the method throws an UnsupportedOperationException .

Overrides:

doSetValue in class AbstractObservableValue

Parameters:

value - The value to set.

getValueType

public 
Object getValueType()

Description copied from interface: IObservableValue

The value type of this observable value, or null if this observable value is untyped.

Returns:

the value type, or null

public static 
WritableValue withValueType(
Object elementType)

protected void addListener(
Object listenerType,
                           
IObservablesListener listener)

protected void removeListener(
Object listenerType,
                              
IObservablesListener listener)

protected boolean hasListeners()

protected void fireEvent(
ObservableEvent event)

protected void firstListenerAdded()

protected void lastListenerRemoved()

public 
Realm getRealm()

protected 
Object clone()
                throws 
CloneNotSupportedException