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oracle adf workshop

Notes:


Business Components: View Objects (VO)

An entity-based VO can be configured to support updatable rows when you create View Objects that map their attributes to the attributes of one or more existing EOs. The mapped EO is saved as an entity usage in the VO definition. In this way, entity-based View Objects cooperate automatically with Entity Objects to enable a fully updatable data model. The entity-based view object queries just the data needed for the client-facing task at hand and relies on its mapped Entity Objects to automatically validate and save changes made to its view rows. Like the read-only view object, an entity-based VO encapsulates a SQL query, can be linked into master or detail hierarchies, and can be used in the data model of your application modules.