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java.lang.Objectorg.eclipse.core.databinding.observable.ChangeManager
org.eclipse.core.databinding.observable.AbstractObservable
org.eclipse.core.databinding.observable.value.AbstractObservableValue
org.eclipse.core.databinding.observable.value.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 | |
---|---|
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 | |
---|---|
Object |
doGetValue()
|
void |
doSetValue(Object value)
Template method for setting the value of the observable. |
Object |
getValueType()
The value type of this observable value, or null if this
observable value is untyped. |
static WritableValue |
withValueType(Object elementType)
|
Methods inherited from class org.eclipse.core.databinding.observable.value.AbstractObservableValue |
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addValueChangeListener, dispose, fireChange, fireValueChange, getValue, isStale, removeValueChangeListener, setValue |
Methods inherited from class org.eclipse.core.databinding.observable.AbstractObservable |
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addChangeListener, addListener, addStaleListener, checkRealm, fireEvent, fireStale, firstListenerAdded, getRealm, hasListeners, lastListenerRemoved, removeChangeListener, removeListener, removeStaleListener |
Methods inherited from class java.lang.Object |
---|
clone, 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, addStaleListener, getRealm, removeChangeListener, removeStaleListener |
Constructor Detail |
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 |
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
|
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Guidelines for using Eclipse APIs.
Copyright (c) IBM Corp. and others 2000, 2007. All rights reserved.