Oracle Business Intelligence Beans Sample

Custom Presentation Wizard

Overview

The New Presentation Wizard sample application enables an end user to define new Crosstabs and Graphs. After the wizard is completed, the newly created presentation is added to a tabbed display. This Crosstab or Graph can then be used to analyze data.

The NewPresentation class provides a menu with access to a simple connection dialog which prompts a user for security credentials. It then makes a connection to Oracle OLAP and - optionally - to the BI Beans Catalog. After the connection is established, the New Presentation Wizard can be invoked from the New menu item.

Code Highlights

The NewPresentationWizard class contains most of the application logic. It extends the BI Beans QueryBuilder, adding the ability to 1) specify a presentation type (i.e. a Crosstab or a Graph) and 2) manages the wizard page navigation - ensuring the appropriate wizard pages appear and are configured appropriately (e.g. show a Graph Type panel when creating a new Graph).

The NewPresentation class extends BIFrame. It adds a New menu item to the File menu. The New item invokes the New Presentation Wizard. The following API calls invoke and configure the wizard:

 NewPresentationWizard npw = new NewPresentationWizard(this);
 npw.setQueryManager(getQueryManager());

 if (npw.run()) {...

Through the QueryManager, the NewPresentationWizard retrieves the MetadataManager object and sets it on the QueryBuilder. The MetadataManager provides access to the OLAP Catalog and BI Beans Catalog metadata that drives the QueryBuilder user interface.

The NewPresentationWizard manages the user's progress through the wizard. It specifies that the QueryBuilder should be run in wizard mode. Then, it creates an instance of the PresentationTypePanel, which asks the user for the type of presentation to create, and the NewPresentationWizard adds the it to the QueryBuilder:

 setMode(QueryBuilder.WIZARD);
 initialize();

 m_prezType = new PresentationTypePanel(this);
 this.addPanel((StandardPanel) m_prezType, QueryBuilder.ITEMS_PANEL_ID);

Navigation through the wizard is managed in the wizardSelectionChanged method. This method will add, remove and modify panels based on whether the presentation is a Graph or a Crosstab.


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