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I'm creating projects with Symfony2/Doctrine and try to implement traits. So far no problem on small tryouts, but I usually do UML class and sequence diagrams before deep in complex projects.
What is the UML design object(s) to be used to symbolize PHP traits, which can be seen as far as I know as behaviors? Is ther any clean way to do so?
Thanks a lot for your answers !
Nicolas
920
UML provides mechanisms to represent class members, such as attributes and methods, and additional information about them like constructors.
A node in UML is represented by a square box as shown in the following figure with a name. A node represents the physical component of the system. Node is used to represent the physical part of a system such as the server, network, etc.
Traits are used to declare methods that can be used in multiple classes. Traits can have methods and abstract methods that can be used in multiple classes, and the methods can have any access modifier (public, private, or protected).
In UML models, attributes represent the information, data, or properties that belong to instances of a classifier. A classifier can have any number of attributes or none at all. Attributes describe a value or a range of values that instances of the classifier can hold.
PHP Trait is basically UML Abstract Class or UML Class Template connected to the used-in class with the UML Generalization Relationship utilizing the multiple inheritance notation
See also:
Figure "UML Diagram with a Trait" in article Brendan Bates: Traits: The Right Way
Programmers: Is there a representation for mixins or traits on UML?
PHP Manual → Language Reference → Classes and Objects → Traits
As of
PHP5.4.0,PHPimplements a method of code reuse calledTraits.
Traitsare a mechanism for code reuse in single inheritance languages such asPHP. ATraitis intended to reduce some limitations of single inheritance by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies. The semantics of the combination ofTraitsand classes is defined in a way which reduces complexity, and avoids the typical problems associated with multiple inheritance andMixins.A
Traitis similar to a class, but only intended to group functionality in a fine-grained and consistent way. It is not possible to instantiate aTraiton its own. It is an addition to traditional inheritance and enables horizontal composition of behavior; that is, the application of class members without requiring inheritance
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