Design Patterns: Object Oriented Software Engineering

Design Patterns

© FAHEEM ANSARY (MS110400056)

Design Patterns

1. Abstract

The Object Oriented Software Engineering provides a standard solution to problems via Design Patterns. It is considered as a well define way of expressing the software design and this is appreciated by the software engineers across the world. We can classify the design patterns by the type of problems they addresses. Many design patterns are established already and also new will be identified as this is the ongoing process, it captures the knowledge from different stages of the software development life cycle. Design Patterns helps software designers by defining the ways of capturing the knowledge from the community of the developers from whole

These classes are static, as determined by inheritance.

b. Object

Patterns in this category versus object relations. These relationships are dynamic and can be changed at runtime.

6. Documenting the Design Patterns

The documentation of design patterns is one of the most difficult tasks. Employers must not only tell the facts, but must provide full details of the problem for which the model used, the situation or the context in which it is used and that the solution provides. An employer must help its members to investigate the existing systems, custom systems to meet the needs of users and the construction of new power plants. A commonly used format the one provided by Gang Of Four contains the following things:-

6.1. Pattern name and classification: Every pattern name should be unique and it should be classifies among one of the existing patterns.

6.2. Intent: Tell the goal of designing and using the pattern.

6.3. Motivation: Provides the scenario in which the pattern could be used.

6.4. Applicability: Represent the context part and tells where the pattern could be applied.

6.5. Structure: Graphical representation using interaction and class

It provides us with basic concept of solving the problems software projects by equipping us with the technique of utilizing others experiences and approaches which cuts the effort or individuals and while coding the little effort is required to achieve the required functionality.

11. References

1. Formal specification of design patterns: a comparison Taibi, T.; Ling, D.N.C. Computer Systems and Applications, 2003. Book of Abstracts.

2. Evolutionary patterns of design and design patterns Aoyama, M. Principles of Software Evolution, 2000.

3. Precise modeling of design patterns in UML Mak, J.K.H.; Choy, C.S.T.; Lun, D.P.K. Software Engineering, 2004. ICSE 2004.

4. Instantiating and detecting design patterns: putting bits and pieces together Albin-Amiot, H.; Cointe, P.; Gueheneuc, Y.-G. Jussien, N. Automated Software Engineering, 2001. (ASE 2001).

5. A controlled experiment in maintenance: comparing design patterns to simpler solutions Prechelt, L.; Unger, B.; Tichy, W.F.; Brossler, P.; Votta, L.G. Software Engineering, IEEE Transactions on ,Volume: 27 , Issue: 12 , Dec.