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SAD stands for Software Architectural Defects and is our implementation of DETEX, following the DECOR method to specify and identify occurrences of anti-patterns in PADL models. A paper introducing DETEX and DECOR has been published by Moha, Guéhéneuc, Duchien, and Le Meur and can be used as reference.
|Blob||The Blob (also called God class) corresponds to a large controller class that depends on data stored in surrounding data classes. A large class declares many fields and methods with a low cohesion. A controller class monopolises most of the processing done by a system, takes most of the decisions, and closely directs the processing of other classes. Controller classes can be identified using suspicious names such as Process, Control, Manage, System, and so on. A data class contains only data and performs no processing on these data. It is composed of highly cohesive fields and accessors.|
object-orientation implement an object-oriented system. Brown describes this antipattern as “a 'main' routine that calls numerous subroutines”. The Functional Decomposition design smell consists of a main class, i.e., a class with a procedural name, such as Compute or Display, in which inheritance and polymorphism are scarcely used, that is associated with small classes, which declare many private fields and implement only a few methods. |
suggest procedural programming. Spaghetti Code does not exploit and prevents the use of object-orientation mechanisms, polymorphism and inheritance. |
because it exposes a high complexity to address all foreseeable needs of a part of a system, whereas the Blob is a singleton monopolising all processing and data of a system. Thus, several Swiss Army Knives may exist in a system, for example utility classes. |