icybears / OODesignAndProgramming

Object oriented design practice in java, exercises taken from Sqli E-challenges.

Object Oriented Design and Programming practice exercices

The following are a couple of programming exercices that focus on Object orientation, taken from "SQLI E-Challenges".

The goal is to design and implement a program that passes all the tests in the test class. Each exercise has its own test class inside in test/net/sabercrafts/oop The exercises are:

• Elevators Exercise

  This test is about a building having several elevators with different states.
  For example, each elevator can be at a different level, and can be going up,
  or down.
  
  The objective of this exercise is to write a program that will identify which
  elevator will be served once a request for an elevator is registered.
  
  Please note these rules : 
  - An elevator is requested by default from <b>top</b> floor. </br>
  - An elevator can be resting at a given floor, going up or going down. </br>
  - An elevator switch automatically his direction when reaching the edges of
  the building (means the first and top floors). </br>
  - An elevator can not switch his direction in the middle of a building.
  Example: in a building of 10 floors, an elevator at the 3rd floor and
  ascending can never go down before reaching the 10th floor. And vice
  versa.</br>
  - An elevator is never in between floors.
  

• Train Exercise

  The aim of this exercise is to design and write a code to pass all tests.
  
  A train is made of different types of wagons: head, passenger, restaurant, and cargo.
  Each type has its specific representation:
  - Head :      <HHHH if its the last wagon
                HHHH> if it is the first wagon
  - Passenger  : |OOOO|
  - Restaurant : |hThT|
  - A cargo wagon can be either empty or loaded
          - If empty : its represented as |____| 
          - If loaded: its represented as |^^^^| 
  
  The wagons are connected by "::"
  

• Quarantine Exercise

   The responsibility of the Quarantine object is to simulate diseases on a group of patients.
   It is initialized with a list of patients' health status, separated by a comma.
        Each health status is described by one or more characters
        (in the test below, we will always have only one disease / patient)
  
    The characters mean:
    H : Healthy
    F : Fever
    D : Diabetes
    T : Tuberculosis
  
    Quarantine provides medicines to the patients, but can not target a specific group of patient.
    The same medicines are always given to all the patients.
  
    Then Quarantine can provide a report with this format:
    "F:1 H:2 D:0 T:1 X:3"
  
    Report give the number of patients that have the given disease.
    X means Dead
  

My proposed solutions

You can find the code inside src/net/sabercrafts/oop. Below is my proposed solutions class diagrams:

Elevators exercise (click to enlarge)

Train exercise (click to enlarge)

Quarantine exercise (click to enlarge)