Merge pull request mouredev#4385 from AmadorQuispe/aqh

mouredev#24 - JAVA

Roadmap/24 - DECORADORES/java/AmadorQuispe.java

@@ -0,0 +1,102 @@
+
+public class Main {
+    public static void main(String[] args) {
+        ConcreteComponent component = new ConcreteComponent();
+        ConcreteDecoratorA componentDecorateA = new ConcreteDecoratorA(component);
+        ConcreteDecoratorB componentDecorateB = new ConcreteDecoratorB(componentDecorateA);
+        componentDecorateB.operation();
+        System.out.println("EXTRA");
+        System.out.println("========================");
+        Arithmetic operable = new Arithmetic();
+        //Llamada sin el decorador
+        double result = operable.sumTwoNumbers(5.6,7.8);
+        System.out.println("Resultado llamada sin decorar :" + result);
+        //Llamada con decorador
+        CountCallDecorator operationDecorated = new CountCallDecorator(operable);
+        result = operationDecorated.sumTwoNumbers(2d,4d);
+        System.out.println("Resultado llamada con decorador :" + result);
+        result = operationDecorated.sumTwoNumbers(4.5,6.7);
+        System.out.println("Resultado llamada con decorador :" + result);
+    }
+
+}
+//Classes Generic
+interface Component{
+    void operation();
+}
+class ConcreteComponent implements Component{
+    @Override
+    public void operation() {
+        System.out.println("Concrete Component Operation");
+    }
+}
+abstract class Decorator implements Component{
+    protected Component component;
+    public Decorator(Component component){
+        this.component = component;
+    }
+    @Override
+    public void operation() {
+        component.operation();
+    }
+}
+class ConcreteDecoratorA extends Decorator{
+    public ConcreteDecoratorA(Component component) {
+        super(component);
+    }
+    protected void otherOperation(){
+        System.out.println("Concrete Decorator A");
+    }
+
+    @Override
+    public void operation() {
+        otherOperation();
+        super.operation();
+    }
+}
+class ConcreteDecoratorB extends Decorator{
+    public ConcreteDecoratorB(Component component) {
+        super(component);
+    }
+    protected void otherOperation(){
+        System.out.println("Concrete Decorator B");
+    }
+
+    @Override
+    public void operation() {
+        otherOperation();
+        super.operation();
+    }
+}
+
+//EXTRA
+interface Operable{
+    double sumTwoNumbers(Double num1, Double num2);
+}
+class Arithmetic implements Operable {
+    @Override
+    public double sumTwoNumbers(Double num1, Double num2) {
+        return num1 + num2;
+    }
+}
+abstract class OperableDecorator implements Operable{
+    protected Operable operable;
+    OperableDecorator(Operable operable){
+        this.operable = operable;
+    }
+}
+
+class CountCallDecorator extends OperableDecorator{
+    private static int countCall = 0;
+    public CountCallDecorator(Operable operable) {
+        super(operable);
+    }
+
+
+    @Override
+    public double sumTwoNumbers(Double num1, Double num2) {
+        countCall++;
+        System.out.println("La función se ha llamado : " + countCall + (countCall>1?" veces":" vez"));
+        return operable.sumTwoNumbers(num1,num2);
+    }
+}