public class WritableValue extends AbstractObservableValue
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.
Constructor and Description |
---|
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.
|
Modifier and Type | Method and Description |
---|---|
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) |
addValueChangeListener, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue
addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener
public WritableValue()
null
value type, and a null
value.public WritableValue(Object initialValue, Object valueType)
initialValue
- can be null
valueType
- can be null
public WritableValue(Realm realm)
realm
, a
null
value type, and a null
initial value.realm
- public Object doGetValue()
doGetValue
in class AbstractObservableValue
public void doSetValue(Object value)
AbstractObservableValue
UnsupportedOperationException
.doSetValue
in class AbstractObservableValue
value
- The value to set.public Object getValueType()
IObservableValue
null
if this
observable value is untyped.null
public static WritableValue withValueType(Object elementType)
elementType
- can be null
null
protected void addListener(Object listenerType, IObservablesListener listener)
listenerType
- listener
- protected void removeListener(Object listenerType, IObservablesListener listener)
listenerType
- listener
- protected boolean hasListeners()
protected void fireEvent(ObservableEvent event)
protected void firstListenerAdded()
protected void lastListenerRemoved()
public Realm getRealm()
protected Object clone() throws CloneNotSupportedException
clone
in class Object
CloneNotSupportedException
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