What is it?

It is basically a way of working with and designing bigger systems/applications.

The way this class works by trying to design systems in various ways.

Abstract

the point with this class is to use oop programming effectively by understanding classes and using object for different aspects of your application

Terms

Topic	Description
Analysis	Understanding a system in its context and conditions for implementation.
Design	Create a theoretical system without many unknown/uncertainties as possible.
Implementation	Realize a design on a technical platform = programming/setting up the physical objects.
Method	The method can be multiple things, water fall and iterative ??? Needs more text.
Granularity	How accurate does the system need to be.

Example

Lets say we have 2 systems. System 1 needs to keep track of items and system 2 just needs to work with piles of dirt. In system one it is very important every object has its own unique id, but in system two we dont need an id for each rock, if the piles have an id that would be good enough. This is because individual rocks wont ever need a unique id so why spare the resources for one, whilst the items do need their own because they will get shipped out to different adresses.

Problem Domain = the problem we want solved

Application Domain = the tools we can use to solve the problem

Examples

Problem Domain

    the greenhouse and its temperature

Application Domain = mantinance?

    gardener

Object And entity with state identity and behavior

Class A collection describing objects with common behavior and attributes

Teacher: vare betalt vare genopfyldt vare fundet medarbejder mødtind medarbejder tagethjem

Hair Salon

Classes

Salon

customer

location

Haircut

worker

Events instantaneous incident involving one or more objects not a method needs to be instantly registered by the system.

timeReserved

paid

arrived

gotHaircut

gotHairWashed

classDiagram
    Salon <|-- Employee
    Salon <|-- Service
    Salon <|-- Appointment
    class Salon{
        String name
        String location
        Employee[] employees
        Service[] services
        Appointment[] appointments
        HireEmplyee()
        FireEmplyee()
    }
    class Employee{
        String id
        String name
        String position
        scheduleAppointment()
        quitJob()
    }
    class Customer{
        String id
        String name
        String phone
        String email
        makeAppointment()
        cancelAppointment()
        paid()
        didntArrive()
    }
    class Service{
        String name
        Number price
        String duration
    }
    class Appointment{
        String id
        Date dateTime
        Customer customer
        Employee employee
        Service service
        makeAppointment()
        cancelAppointment()
    }

    Customer  --  Appointment : books

customer is a subclass of person and so is employee superclass is written with cursive also known as generalization

‘has ‐a’ or ‘owns ‐a’ relation (more common)

example 1 car has 4 wheels or more

number ..* means the amount before the number as minimum and more cause dot dot star

cant be changed

loose non-defining relation example 1 or more persons can have 0 or more cars

can be changed

control structure of behavior

+ means 0 or once * means it can happen many times

classDiagram
    Class01 <|-- Class02 : Inheritance
    Class03 --|> Class04 : Inheritance
    Class05 --> Class06 : Association
    Class07 --* Class08 : Aggregation
    Class09 --o Class10 : Composition
    Class11 ..> Class12 : Dependency
    Class13 -- Class14 : Association (undirected)