Adobe® Flex® 4 Language Reference
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mx.olap 
IOLAPCube 
Packagemx.olap
Interfacepublic interface IOLAPCube
Implementors OLAPCube

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The IOLAPCube interface represents an OLAP cube that holds an N-dimensional representation of a flat data set. You use an OLAP schema to define how the cube represents the input flat data set.

An OLAP cube is analogous to a table in a relational database. Where a table in a relational database has two dimensions, an OLAP cube can have any number of dimensions. In its simplest form, the dimensions of an OLAP cube correspond to a field of the flat data set.

After setting the schema of the OLAP cube, you must call the IOLAPCube.refresh() method to build the cube. Upon completion of cube initialization, the OLAP cube dispatches the complete event to signal that the cube is ready to query.

See also



Public Properties
 PropertyDefined By
  dimensions : IList
[read-only] All dimensions in the cube, as a list of IOLAPDimension instances.
IOLAPCube
  name : String
[read-only] The name of the OLAP cube.
IOLAPCube
Public Methods
 MethodDefined By
  
Aborts a query that has been submitted for execution.
IOLAPCube
  
Aborts the current cube refresh, if one is executing.
IOLAPCube
  
Queues an OLAP query for execution.
IOLAPCube
  
Returns the dimension with the given name within the OLAP cube.
IOLAPCube
  
Refreshes the cube from the data provider.
IOLAPCube
Property Detail

dimensions

property
dimensions:IList  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

All dimensions in the cube, as a list of IOLAPDimension instances.



Implementation
    public function get dimensions():IList

name

property 
name:String  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The name of the OLAP cube.



Implementation
    public function get name():String
Method Detail

cancelQuery

()method
public function cancelQuery(query:IOLAPQuery):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Aborts a query that has been submitted for execution.

Parameters

query:IOLAPQuery — The query to abort.

cancelRefresh

()method 
public function cancelRefresh():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Aborts the current cube refresh, if one is executing.

execute

()method 
public function execute(query:IOLAPQuery):mx.rpc:AsyncToken

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Queues an OLAP query for execution. After you call the refresh() method to update the cube, you must wait for a complete event before you call the execute() method.

OLAP cubes can be complex, so you do not want your application to pause while Flex calculates the results of your OLAP query. The execute() method returns an instance of the AsyncToken class, which lets you set up handlers for asynchronous operations so that your application can continue to execute during query processing.

When using the AsyncToken class, you set up two functions to handle the query results. In this example, the showResult() function handles the query results when the query succeeds, and the showFault() function handles any errors detected during query execution:

      <mx:Script>
              
              // Function to execute a query.
              private function runQuery(cube:IOLAPCube):void {
                  // Create a query instance.
                  var query:IOLAPQuery = getQuery(cube);
                  // Execute the query.
                  var token:AsyncToken = cube.execute(query);
                  // Set up handlers for the query results.
                  token.addResponder(new AsyncResponder(showResult, showFault));
              }
              
              // Handle a query fault.
              private function showFault(result:FaultEvent, token:Object):void {
                  Alert.show("Error in query.");
              }
      
              // Handle a query success.
              private function showResult(result:Object, token:Object):void {
                  if (!result) {
                      Alert.show("No results from query.");
                      return;
                  }
      
                  myOLAPDG.dataProvider= result as OLAPResult;            
              }        
      </mx:Script>
      
      <mx:OLAPDataGrid id="myOLAPDG" width="100%" height="100%" />
      

Parameters

query:IOLAPQuery — The query to execute, represented by an IOLAPQuery instance.

Returns
mx.rpc:AsyncToken — An AsyncToken instance.

See also

findDimension

()method 
public function findDimension(name:String):IOLAPDimension

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the dimension with the given name within the OLAP cube.

Parameters

name:String — The name of the dimension.

Returns
IOLAPDimension — An IOLAPDimension instance representing the dimension, or null if a dimension is not found.

refresh

()method 
public function refresh():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Refreshes the cube from the data provider. After setting the cube's schema, you must call this method to build the cube.

This method dispatches a progress event to indicate progress, and dispatches a complete event when the cube is complete and ready to execute queries. You must wait for a complete event before you call the execute() method to run a query.

See also