May 2019
Beginner to intermediate
548 pages
12h 39m
English
Content preview from Mastering SAP ABAP
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Facade - structural pattern
The Facade pattern can be used to create a single point of access to a complex system by issuing a simplified, structured programming interface that facilitates its use. It is frequently used when we want to hide some part of implementation from the user, for example, when they want to create an order.
The user sees only the interface used to create orders, but in the backend, classes and methods are necessary to process this order, for example, as follows:
- Checking the availability of the product
- Filling in the form
- Paying the check
- Creating data for the delivery
The facade pattern is built with these three elements:
- A complex system: In our example, this is a system to create an order.
- Facade: A class whose ...
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