public final class LastPostObserverView extends java.lang.Object implements View
Constructor and Description |
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LastPostObserverView(int streamId)
Ctor.
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Modifier and Type | Method and Description |
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View |
addView(View view)
Add a view to the viewable object.
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EventType |
getEventType()
Provides metadata information about the type of object the event collection contains.
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Viewable |
getParent()
Returns the View's parent Viewable.
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View[] |
getViews()
Returns all added views.
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boolean |
hasViews()
Test is there are any views to the Viewable.
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java.util.Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection.
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void |
removeAllViews()
Remove all views.
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boolean |
removeView(View view)
Remove a view.
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void |
setObserver(LastPostObserver observer)
Set an observer.
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void |
setParent(Viewable parent)
Called when the View is added to a Viewable object.
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void |
update(EventBean[] newData,
EventBean[] oldData)
Notify that data has been added or removed from the Viewable parent.
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public LastPostObserverView(int streamId)
streamId
- - number of the stream for which the view buffers the generated events.public void setObserver(LastPostObserver observer)
observer
- to be called when results are availablepublic final EventType getEventType()
EventCollection
getEventType
in interface EventCollection
public final java.util.Iterator<EventBean> iterator()
EventCollection
iterator
in interface EventCollection
iterator
in interface java.lang.Iterable<EventBean>
public Viewable getParent()
View
public void setParent(Viewable parent)
View
public View addView(View view)
Viewable
public View[] getViews()
Viewable
public boolean removeView(View view)
Viewable
removeView
in interface Viewable
view
- to removepublic void removeAllViews()
Viewable
removeAllViews
in interface Viewable
public boolean hasViews()
Viewable
public final void update(EventBean[] newData, EventBean[] oldData)
View
If the call to update contains new (inserted) data, then the first argument will be a non-empty list and the second will be empty. Similarly, if the call is a notification of deleted data, then the first argument will be empty and the second will be non-empty. Either the newData or oldData will be non-null. This method won't be called with both arguments being null, but either one could be null. The same is true for zero-length arrays. Either newData or oldData will be non-empty. If both are non-empty, then the update is a modification notification.
When update() is called on a view by the parent object, the data in newData will be in the collection of the parent, and its data structures will be arranged to reflect that. The data in oldData will not be in the parent's data structures, and any access to the parent will indicate that that data is no longer there.