TADESSE TAREKE.pdf - Addis Ababa University

Related Work Business Rules Object-Oriented Method
addressed issues in object-oriented programming until the work of some
researchers such as Yoder et al. [62] and Kienzle et al. [30]. For example, Kienzle
et al. use the standard design patterns such as Serializer, Factory Method, and
Strategy to produce a framework for persisting objects. The work of Sauer [51] is
typically a lightweight framework for object relational mapping to Java Database
Connectivity (JDBC). Sauer uses a number of standard design patterns such as
Template, Strategy, Command, and Composite. This same work uses non-OO
Relational DBMS (RDBMS) for its persistency mechanism.
The work of Yoder et al. [62] is a pattern catalogue for connecting business objects
to RDBMS (i.e., on how to persist objects to RDBMS). The paper selected RDBMS
for a number of reasons: systems often need to store objects in RDBMS; systems
often need the maturity of RDBMS; and other times, the corporate policy is to use
RDBMS.
Ambler [2] also presents how to design persistence layer avoiding hard coding
SQL in business classes since such an act results in code that is difficult to
maintain and extend. According to this work, even hard coding SQL in separate
data classes or stored procedures is only slightly better. Ambler recommends a
persistence layer that maps objects to persistence mechanism, which the author
calls it robust persistence layer.
A framework for relational database access layers is also provided in [61]. This
same work is similar to the work of Sauer but the framework of [61] can be used for
both OO and non-OO programming languages.
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