October 2004
Intermediate to advanced
856 pages
23h 33m
English
Let no act be done haphazardly, nor otherwise than according to the finished rules that govern its kind.
—Marcus Aurelius (A.D. 121–180), Meditations
Chapter 9 discusses business domain components as representations of data and as enforcers of simple business rules, such as those implemented as foreign key constraints and mandatory attributes. Business domain components can also encapsulate more complex business rules pertaining to the data they represent. An entity object definition or domain can enforce validation rules for attribute values, calculate default values of attributes, and automatically calculate the values of transient attributes. This chapter explains how to use business domain components to ...
Read now
Unlock full access