1w50
Buschman et al
According to Buschman, classification is based on three criteria. The functionality criteria classifies patterns based on the specific functionality that the design pattern will be used for. The structural principles classifies patterns based on the architectural patterns that the design pattern is utilizing.
| Functionality | Structural Principle |
|---|---|
| Creation | Abstraction |
| Communication | Encapsulation |
| Access | Separation of concerns |
| Computation of complex tasks | Coupling and cohesion |
Patterns which belong to the sub category creation specify the manner in which to instantiate certain complex recursive or aggregate object structures. Patterns belonging to the subcategory communication describes the communication protocol to be followed during the remote or independent development of certain collaborating objects. Patterns of the access category will describe the scope of a particular object. Patterns belonging to the category organizing the computation of complex tasks specify the way in which responsibility can be allocated among collaborating objects.
Patterns belonging to the subcategory abstraction gives an abstract overview of functionality in a software system. Patterns belonging to the subcategory encapsulation hide details of objects to eradicate dependencies.Patterns in the subcategory separation of concern segregates specific responsibilities into different objects or components to solve a particular task or provide a certain service. Patterns belonging to the category coupling and cohesion will ease out the structural and communicational dependencies between strongly coupled objects.
Coad
Coad organizes his pattern classification around a certain pattern which will further serve as a template for other patterns that follow.
| Pattern | Description |
|---|---|
| fundamental pattern | template for other patterns |
| aggregate patterns | patterns that interact with transaction players |
| plan patterns | patterns that interact with a plan player |
| interaction patterns | Patterns which interact with the other players |
Pree
Pree classification is based on the structure of the design pattern.
basic inheritance and interaction patterns patterns for structuring object-oriented software systems patterns based on recursive structures patterns relying on abstract coupling patterns related to the MVC-framework