use case diagram for online shopping system pdf

Make your own UML class diagram with Gleek. The purchase and delivery of a product in an online shopping system are usually arranged as one order attached to the buyer.

In addition, since we are talking about online commerce, the shipping process is set up separately.

It is also worth bearing in mind that the product is bought and sold for money, which leads to the payment process. Consequently, there are two parties - sellers and buyers - as well as the object of sale, i.e., product (or items). In general terms, an online shopping system is a platform on which you can buy products online. Online shopping system and its components Essentially a kind of aggregation, only, in this case, classes that are part of another class are destroyed when the aggregator class is destroyed.Ĭheck out our article on UML Class diagram arrows. A special type of association between classes, wherein one class is part of another.Ĭomposition. Dependency is a special case of the association of two classes, wherein changes in one class will inevitably lead to changes in the other.Īggregation. If the object is not stored in a class field, this type of interclass relationship is modeled as a dependency. An object of one class can use an object of another class in its method. It usually refers to the relationship between an interface and the objects that implement it.ĭependency.

This is a schematic representation of the relationship between a parent class and its descendants. In addition, we can also specify the multiplicity, that is, the number of objects that can take part in the relationship. Often we can also see a verb conveying its meaning. Assuming we have two classes that interact, there must be a continuous connecting line between them, denoting an association in the diagram. Similar to relationships that connect objects, associations connect classes. In UML diagrams, there are most often these six types of relationships between classes:Īssociation. A class represents a concept that describes state ( attributes) and behavior ( methods). In other words, a class describes what an object can be.

įor a deeper understanding, let's first recall what a class is.Ī class is a template for creating objects that provides initial state values: initializing fields` variables and implementing the behavior of fields and methods. Learn more about UML and its diagram types. What is a class diagram, and what is it used for?Ī UML (Unified Modeling Language) class diagram illustrates the structure of a system by describing the classes, their attributes, methods, and relationships between objects.

Use case diagram for online shopping system pdf