[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]
Notify that data has been added or removed from the Viewable parent.
The last object in the newData array of objects would be the newest object added to the parent view.
The first object of the oldData array of objects would be the oldest object removed from the parent 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.
Namespace: net.esper.core
Assembly:
NEsper (in NEsper.dll)
Syntax