//Abstract factory pattern
//This programs creates shapes and their respective colors using factories.
public interface Shape{
void draw();
}
public interface Color{
void fill();
}
public class Rectangle implements Shape{
public void draw(){
System.out.println("In Rectangle::draw() method.");
}
}
public class Square implements Shape{
public void draw(){
System.out.println("In Square::draw() method.");
}
}
public class Circle implements Shape{
public void draw(){
System.out.println("In Circle::draw() method.");
}
}
public class Red implements Color{
public void fill(){
System.out.println("In Red::draw() method.");
}
}
public class Green implements Color{
public void fill(){
System.out.println("In Green::draw() method.");
}
}
public class Blue implements Color{
public void fill(){
System.out.println("In Blue::draw() method.");
}
}
public abstract class absFactory{
abstract color getColor(String color);
abstract Shape getShape(String shape);
}
public class ShapeFactory extends absFactory{
public Shape getShape(String shapeType){
if(shapeType == null){
return null;
}
if(shapeType.equalsIgnoreCase("CIRCLE")){
return new Circle();
}else if(shapeType.equalsIgnoreCase("SQUARE")){
return new Square();
}else if(shapeType.equalsIgnoreCase("RECTANGLE")){
return new Rectangle();
}else{
return null;
}
}
Color getColor(String color){
return null;
}
}
public class ColorFactory extends absFactory{
public Shape getShape(String shapeType){
return null;
}
Color getColor(String color){
if(color == null){
return null;
}
if(color.equalsIgnoreCase("RED")){
return new Red();
}else if(color.equalsIgnoreCase("GREEN")){
return new Green();
}else if(color.equalsIgnoreCase("BLUE")){
return new Blue();
}else{
return null;
}
}
}
public class FactoryProducer{
public static absFactory getFactory(String choice){
if(choice.equalsIgnoreCase("SHAPE")){
return new ShapeFactory();
}else if(choice.equalsIgnoreCase("COLOR")){
return new ColorFactory();
}else{
return null;
}
}
}
public class abstractFactory{
public static void main(String[] args){
absFactory shapeFactory = FactoryProducer.getFactory("SHAPE");
Shape shape1 = shapeFactory.getShape("CIRCLE");
shape1.draw();
Shape shape2 = shapeFactory.getShape("RECTANGLE");
shape2.draw();
Shape shape3 = shapeFactory.getShape("SQUARE");
shape3.draw();
absFactory colorFactory = FactoryProducer.getFactory("COLOR");
Color color1 = colorFactory.getColor("RED");
color1.fill();
Color color2 = colorFactory.getColor("GREEN");
color2.fill();
Color color3 = colorFactory.getColor("BLUE");
color3.fill();
}
}