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java.lang.Objectorg.eclipse.core.databinding.observable.AbstractObservable
org.eclipse.core.databinding.observable.value.AbstractObservableValue
org.eclipse.core.databinding.observable.value.WritableValue
public class WritableValue
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.
Constructor Summary | |
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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. |
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WritableValue(Realm realm)
Constructs a new instance with the provided realm , a
null value type, and a null initial value. |
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WritableValue(Realm realm,
Object initialValue,
Object valueType)
Constructs a new instance. |
Method Summary | |
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protected void |
addListener(Object listenerType,
IObservablesListener listener)
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protected Object |
clone()
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Object |
doGetValue()
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void |
doSetValue(Object value)
Template method for setting the value of the observable. |
protected void |
fireEvent(ObservableEvent event)
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protected void |
firstListenerAdded()
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Realm |
getRealm()
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Object |
getValueType()
The value type of this observable value, or null if this
observable value is untyped. |
protected boolean |
hasListeners()
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protected void |
lastListenerRemoved()
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protected void |
removeListener(Object listenerType,
IObservablesListener listener)
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static WritableValue |
withValueType(Object elementType)
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Methods inherited from class org.eclipse.core.databinding.observable.value.AbstractObservableValue |
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addValueChangeListener, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue |
Methods inherited from class org.eclipse.core.databinding.observable.AbstractObservable |
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addChangeListener, addDisposeListener, addStaleListener, checkRealm, dispose, fireStale, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.eclipse.core.databinding.observable.IObservable |
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addChangeListener, addDisposeListener, addStaleListener, dispose, getRealm, isDisposed, removeChangeListener, removeDisposeListener, removeStaleListener |
Constructor Detail |
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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 WritableValue(Realm realm, Object initialValue, Object valueType)
realm
- initialValue
- can be null
valueType
- can be null
Method Detail |
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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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