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Oracle® OLAP Java API Reference 11g Release 1 (11.1) B28128-01 |
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public interface CursorManagerUpdateListener
An interface for a listener object that a CursorManager
notifies when a change occurs to the Source
associated with the CursorManager
. You can use a CursorManagerUpdateListener
to notify the display portion of your application that changes have occurred in the query generation portion of your application.
Method Summary | |
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void |
cursorManagerDataUpdated(CursorManagerUpdateEvent event) Called by a CursorManager when it becomes aware that the Source has changed so that the data specified by Source is different but the structure of the Source has not changed. |
void |
cursorManagerSpecificationUpdated(CursorManagerUpdateEvent event) Called by a CursorManager when the CursorInfoSpecification associated with it has been updated. |
void |
cursorManagerStructureUpdated(CursorManagerUpdateEvent event) Called by a CursorManager when it becomes aware that the structure has changed of the Source associated with it. |
Method Detail |
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void cursorManagerDataUpdated(CursorManagerUpdateEvent event)
CursorManager
when it becomes aware that the Source
has changed so that the data specified by Source
is different but the structure of the Source
has not changed. Because the structure is unchanged, the application does not need to create a new CursorManagerSpecification
or new Cursor
objects. It only needs to repaint the display of the data.
The following is an example of a Source
for which the data it specifies changes but whose structure remains the same: a Template
specifies a selection of a number of values from the top or bottom of a set of the values of a measure, The structure of the query is the set of dimension selections that the Source
specifies. An application creates a Source
through the Template
that represents a selection of the top ten measure values. The end user then changes the selection for that Template
so that the selection specifies the bottom ten values. When the application commits that change into the Transaction
in which the original Source
was created, the data selection that the Source
represents changes but the structure of the Source
does not change. The CursorManager
is notified that the data specified by the Source
has changed. The CursorManager
then calls this method of the listeners associated with it.
event
- The CursorManagerUpdateEvent
generated by the the CursorManager
.void cursorManagerStructureUpdated(CursorManagerUpdateEvent event)
CursorManager
when it becomes aware that the structure has changed of the Source
associated with it. Because the structure has changed, the application must create a new CursorManagerSpecification
for the CursorManager
and then create new Cursor
objects.
To continue the example described in the cursorManagerDataUpdated
method: after changing the selection from the top ten to the bottom ten values, the end user then changes the selection of members of one of the dimensions of the measure so that the selection has fewer members. Specifying a different number of dimension members changes the structure of the query. When the application commits that change into the Transaction
in which the original Source
was created, the structure of the Source
is then different. The CursorManager
is notified that the structure has changed and it calls this method of the listeners associated with it.
event
- The CursorManagerUpdateEvent
generated by the the CursorManager
.void cursorManagerSpecificationUpdated(CursorManagerUpdateEvent event)
CursorManager
when the CursorInfoSpecification
associated with it has been updated. When the listener receives a CursorManagerUpdateEvent
, the application can create new Cursor
objects from the CursorManager
.event
- The CursorManagerUpdateEvent
generated by the the CursorManager
.
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