1. Bc. Matej Kováč Vedúci projektu: prof. Ing. Pavol Návrat, PhD.
Refaktorizácia softvérových systémov s podporou kontextového odporúčania
Bc. Matej Kováč
Vedúci projektu: prof. Ing. Pavol Návrat, PhD.

2. Refaktorizácia a návrhové vzory
GoF, Design Patterns: Elements of Reusable Object-Oriented Software
M. Fowler, Refactoring: Improving the design of existing code
J. Kerievsky, Refactoring to Patterns

3. Ciele práce
Vytvorenie prístupu pre identifikáciu nedostatkov v návrhu existujúcich systémov, ktoré je možné odstrániť zavedením návrhových vzorov
Zakomponovanie prístupu do existujúceho vývojového prostredia

4. JDeodorant: Refaktorizácia so vnášaním polymorfizmu
N. Tsantalis and A. Chatzigeorgiou, Identification of refactoring opportunities introducing polymorphism, Elsevier, 2009.

5. public class Square extends Shape {
private double side;
public double calculateArea() {
return side * side; }

6. public class CarStore {
public Car createCar(EquipmentClass equipmentClass) {
// deklarácie premenných a pod.
switch (equipmentClass) {
case COMFORT:
engine = new DieselEngine();
seat = new FabricSeat();
transmission = new ManualTransmission();
break;
case SPORT:
engine = new PetrolEngine();
seat = new SportSeat();
transmission = new DualClutchTransmission();
case LUXURY:
engine = new HybridEngine();
seat = new LeatherSeat();
transmission = new AutomaticTransmission(); }
return new Car(engine, seat, transmission);
aaa}

7. public class CarStore {
public Car createCar(EquipmentClass equipmentClass) {
// deklarácie premenných a pod.
switch (equipmentClass) {
case COMFORT:
engine = new DieselEngine();
seat = new FabricSeat();
transmission = new ManualTransmission();
break;
case SPORT:
engine = new PetrolEngine();
seat = new SportSeat();
transmission = new DualClutchTransmission();
case LUXURY:
engine = new HybridEngine();
seat = new LeatherSeat();
transmission = new AutomaticTransmission(); }
return new Car(engine, seat, transmission);
aaa}

8. Abstract Factory

9. Abstract Factory Factory Method Engine Seat Transmission COMFORT 1
switch (equipmentClass) {
case COMFORT:
engine = new DieselEngine();
seat = new FabricSeat();
transmission = new ManualTransmission();
break;
case SPORT:
engine = new PetrolEngine();
transmission = new DualTransmission();
case LUXURY:
engine = new HybridEngine();
seat = new LeatherSeat();
transmission = new AutomaticTransmission(); }
switch (equipmentClass) {
case COMFORT:
engine = new DieselEngine();
seat = new FabricSeat();
break;
case SPORT:
engine = new PetrolEngine();
case LUXURY:
engine = new HybridEngine();
something = new SomethingElse(); }
Engine
Seat
Transmission
COMFORT 1
SPORT
LUXURY
Engine
Seat
COMFORT 1
SPORT
LUXURY
Abstract Factory
Factory Method

10. Builder public class Car { private String model; // povinný atribút
private String brand; // povinný atribút
private Color color; // nepovinný atribút
private EquipmentClass equipment; // nepovinný atribút
public Car(String model, String brand) {
this(model, brand, null); }
public Car(String model, String brand, Color color) {
this(model, brand, color, null);
public Car(String model, String brand, Color color,
EquipmentClass equipment) {
this.model = model;
this.brand = brand;
this.color = color;
this.equipment = equipment;

11. Builder public class CarSeller { private Car car;
public void prepareCar() {
Car car = new Car();
car.setColor(new Color(255,255,255));
car.setBrand("Audi");
car.setModel("A3");
car.setId(1L);
car.setWheels(4); }
Joshua Bloch. Effective Java. Java Series. Pearson Education, 2008.

12. Mediator

14. Plán Podpora pre nasadenie inštancií odporúčaných vzorov
Overenie riešenia

15. Zhrnutie Odporúčané vzory: Odporúčania na úrovni: Abstract Factory
Builder
Factory Method
Mediator
Odporúčania na úrovni:
Kompilačných jednotiek (.java súbor)
Balíkov
Projektov