public class PriorEventView extends ViewSupport implements ViewDataVisitable
| Modifier and Type | Field and Description |
|---|---|
protected ViewUpdatedCollection |
buffer |
EMPTY_VIEW_ARRAY| Constructor and Description |
|---|
PriorEventView(ViewUpdatedCollection buffer)
Ctor.
|
| Modifier and Type | Method and Description |
|---|---|
ViewUpdatedCollection |
getBuffer()
Returns the underlying buffer used for access to prior events.
|
EventType |
getEventType()
Provides metadata information about the type of object the event collection contains.
|
Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection.
|
void |
setParent(Viewable parent)
Called when the View is added to a Viewable object.
|
void |
update(EventBean[] newData,
EventBean[] oldData)
Notify that data has been added or removed from the Viewable parent.
|
void |
visitView(ViewDataVisitor viewDataVisitor) |
addView, addView, dumpChildViews, dumpUpdateParams, dumpUpdateParams, findDescendent, findViewIndex, getParent, getViews, hasViews, removeAllViews, removeView, removeView, updateChildren, updateChildrenclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitforEach, spliteratorprotected ViewUpdatedCollection buffer
public PriorEventView(ViewUpdatedCollection buffer)
buffer - is handling the actual storage of events for use in the 'prior' expressionpublic void update(EventBean[] newData, EventBean[] oldData)
ViewIf 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.
public void setParent(Viewable parent)
ViewsetParent in interface ViewsetParent in class ViewSupportparent - is the parent that this view is a child ofpublic ViewUpdatedCollection getBuffer()
public EventType getEventType()
EventCollectiongetEventType in interface EventCollectionpublic Iterator<EventBean> iterator()
EventCollectioniterator in interface EventCollectioniterator in interface Iterable<EventBean>public void visitView(ViewDataVisitor viewDataVisitor)
visitView in interface ViewDataVisitable