Business service possibilities

The business service layer is doing most of the work that the application performs, such as delivering data, accepting instructions to create, change, or remove data, and performing more complicated calculations and operations. This layer interacts with the user interface part of the application through the use of ADF bindings.

There are several ways of building business services in an ADF application, but by far the easiest is to use ADF Business Components (ADF BC) based on database tables. This is the approach taken in this book and in many tutorials on ADF development. If you are just starting out with ADF, you should definitely master this way of building applications first.

Other alternatives are:

• Building Plain Old Java Objects (POJOs) to encapsulate some other data source (for example, web services) and then creating data controls based on these POJOs.

• Building Business Components on top of other data sources rather than on top of database tables. This...