Factory Design Pattern

slgobinath · slgobinath · commit 06a8bb97ac3d · 2015-03-12T14:35:49.000+05:30
diff --git a/designpatterns/factory/v1/ShapeClient.java b/designpatterns/factory/v1/ShapeClient.java
@@ -0,0 +1,14 @@
+import java.util.Random;
+import com.javahelps.shapes.*;
+
+public class ShapeClient {
+    public static void main(String[] args) {
+        Random random = new Random();
+        Shape circle = new Circle(random.nextInt());
+        Shape square = new Square(random.nextInt());
+        Shape rectangle = new Rectangle(random.nextInt(), random.nextInt());
+        circle.draw();
+        square.draw();
+        rectangle.draw();
+    }
+}
diff --git a/designpatterns/factory/v1/com/javahelps/shapes/Circle.java b/designpatterns/factory/v1/com/javahelps/shapes/Circle.java
@@ -0,0 +1,14 @@
+package com.javahelps.shapes;
+
+public class Circle implements Shape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Circle");
+    }
+}
diff --git a/designpatterns/factory/v1/com/javahelps/shapes/Rectangle.java b/designpatterns/factory/v1/com/javahelps/shapes/Rectangle.java
@@ -0,0 +1,16 @@
+package com.javahelps.shapes;
+
+public class Rectangle implements Shape {
+    private int width;
+    private int height;
+
+    public Rectangle(int width, int height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Rectangle");
+    }
+}
diff --git a/designpatterns/factory/v1/com/javahelps/shapes/Shape.java b/designpatterns/factory/v1/com/javahelps/shapes/Shape.java
@@ -0,0 +1,5 @@
+package com.javahelps.shapes;
+
+public interface Shape {
+    public void draw();
+}
diff --git a/designpatterns/factory/v1/com/javahelps/shapes/Square.java b/designpatterns/factory/v1/com/javahelps/shapes/Square.java
@@ -0,0 +1,14 @@
+package com.javahelps.shapes;
+
+public class Square implements Shape {
+    private int width;
+
+    public Square(int width) {
+        this.width = width;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Square");
+    }
+}
diff --git a/designpatterns/factory/v2/ShapeClient.java b/designpatterns/factory/v2/ShapeClient.java
@@ -0,0 +1,13 @@
+import com.javahelps.shapes.*;
+
+public class ShapeClient {
+    public static void main(String[] args) {
+        ShapeFactory factory = new ShapeFactory();
+        Shape circle = factory.createShape(ShapeFactory.Type.CIRCLE);
+        Shape square = factory.createShape(ShapeFactory.Type.SQUARE);
+        Shape rectangle = factory.createShape(ShapeFactory.Type.RECTANGLE);
+        circle.draw();
+        square.draw();
+        rectangle.draw();
+    }
+}
diff --git a/designpatterns/factory/v2/com/javahelps/shapes/Circle.java b/designpatterns/factory/v2/com/javahelps/shapes/Circle.java
@@ -0,0 +1,14 @@
+package com.javahelps.shapes;
+
+class Circle implements Shape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Circle");
+    }
+}
diff --git a/designpatterns/factory/v2/com/javahelps/shapes/Rectangle.java b/designpatterns/factory/v2/com/javahelps/shapes/Rectangle.java
@@ -0,0 +1,16 @@
+package com.javahelps.shapes;
+
+class Rectangle implements Shape {
+    private int width;
+    private int height;
+
+    public Rectangle(int width, int height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Rectangle");
+    }
+}
diff --git a/designpatterns/factory/v2/com/javahelps/shapes/Shape.java b/designpatterns/factory/v2/com/javahelps/shapes/Shape.java
@@ -0,0 +1,5 @@
+package com.javahelps.shapes;
+
+public interface Shape {
+    public void draw();
+}
diff --git a/designpatterns/factory/v2/com/javahelps/shapes/ShapeFactory.java b/designpatterns/factory/v2/com/javahelps/shapes/ShapeFactory.java
@@ -0,0 +1,25 @@
+package com.javahelps.shapes;
+
+import java.util.Random;
+
+public class ShapeFactory {
+    private Random random = new Random();
+    public enum Type {
+        CIRCLE, SQUARE, RECTANGLE;
+    }
+
+    public Shape createShape(Type type) {
+        Shape shape = null;
+        switch (type) {
+        case CIRCLE:
+            shape = new Circle(random.nextInt());
+            break;
+        case SQUARE:
+            shape = new Square(random.nextInt());
+            break;
+        case RECTANGLE:
+            shape = new Rectangle(random.nextInt(), random.nextInt());
+        }
+        return shape;
+    }
+}
diff --git a/designpatterns/factory/v2/com/javahelps/shapes/Square.java b/designpatterns/factory/v2/com/javahelps/shapes/Square.java
@@ -0,0 +1,14 @@
+package com.javahelps.shapes;
+
+class Square implements Shape {
+    private int width;
+
+    public Square(int width) {
+        this.width = width;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Square");
+    }
+}
