CS665 Software Design And Patterns

My implementation has achieved a high degree of simplicity and understandability as a result of using objects to represent different objects specified in the requirements. Each object has its own methods and attributes. The objects interact with each other to form the complete program which is easy to understand because it is modular based thus it’s easy to understand. The solution to be implemented will be flexible because each object has its own methods and attributes.

To avoid duplicate code, concept of inheritance was adopted by use of a superclass and a subclass. By using inheritance the sub class is able to inherit the properties of the superclass. The properties include all the attributes and methods making up the superclass. For example a basic implementation to be adopted is for product class and Food class. The product class will have a name and price and the mutator and accessor methods for each of the attributes. Because food has a name and price too but also has another attribute of type for warm or frozen foods.

Thus inheritance is implemented where by Food inherits all the properties of the Product class thus the food class can use all the properties of the super class. This helped eliminate code duplication. The type of inheritance implemented in the solution is single inheritance which involves one superclass and one subclass. The concept of superclass and subclass for the implementation significantly minimizes the amount of duplicate code. It also provides more flexibility in changing the code.

Task 2.2 UML class diagram

The Class diagram is used to show the static structure of a system. It models a system by showing the classes, the attributes making up the classes, the operations in the classes and any relationships existing between the relations. UML class diagrams are very useful in objected oriented programming as they can be used to show the general conceptual model of the expected application.

The following diagram shows the UML class diagram for the proposed system. 

Task 2.3 Sequence diagrams

Sequence diagrams are used to show the behavioral nature of the system by showing the interaction between the user and the system through use of parallel lines from one one side to the other. THe lines are used to indicate the interactions that happen while also showing the systematic flows of the interactions and actions that are performed by each object or user.

The following diagram shows the sequence diagram for the proposed system.