Merge pull request mouredev#7286 from danhingar/ejercicio24

#24 - Java

Author: kontroldev

Roadmap/24 - DECORADORES/java/danhingar.java

@@ -0,0 +1,175 @@
+public class danhingar {
+    public static void main(String[] args) {
+        Function function1 = new FunctionNameDecorator(new ExampleFunction("function1"));
+        function1.execute();
+
+        Function function2 = new FunctionNameDecorator(new ExampleFunction("function2"));
+        function2.execute();
+
+        Function function3 = new FunctionNameDecorator(new ExampleFunction("function3"));
+        function3.execute();
+
+        Function function4 = new FunctionCounterDecorator(new ExampleFunction("function4"));
+        function4.execute();
+        function4.execute();
+
+        Function function5 = new FunctionCounterDecorator(new ExampleFunction("function5"));
+        function5.execute();
+
+        function4.execute();
+        function4.execute();
+        function5.execute();
+
+        //EJEMPLO EXTRA
+        BaseDecorator notifier = new SMSDecorator(new FacebookDecorator(new SlackDecorator(new basicNotifier())));
+
+        notifier.send("HELLO!!");
+
+        
+        Notifier basicNotifier = new basicNotifier();
+
+        Notifier smsNotifier = new SMSDecorator(basicNotifier);
+        Notifier facebookNotifier = new FacebookDecorator(smsNotifier);
+        Notifier slackNotifier = new SlackDecorator(facebookNotifier);
+
+        slackNotifier.send("GOODBYE!!");
+    }
+
+}
+
+interface Function {
+    void execute();
+}
+
+class ExampleFunction implements Function {
+    private String nameFunction;
+
+    public ExampleFunction(String nameFunction) {
+        this.nameFunction = nameFunction;
+    }
+
+    @Override
+    public void execute() {
+        System.out.println("Ejecutando la función " + this.nameFunction);
+    }
+
+    public String getNameFunction() {
+        return nameFunction;
+    }
+
+}
+
+class FunctionNameDecorator implements Function {
+    private final ExampleFunction function;
+
+    public FunctionNameDecorator(ExampleFunction function) {
+        this.function = function;
+    }
+
+    @Override
+    public void execute() {
+
+        System.out.println("La función '" + function.getNameFunction() + "' ha sido llamada.");
+
+        function.execute();
+
+    }
+}
+
+class FunctionCounterDecorator implements Function {
+    private final ExampleFunction function;
+    private int callCounter = 0;
+
+    public FunctionCounterDecorator(ExampleFunction function) {
+        this.function = function;
+    }
+
+    @Override
+    public void execute() {
+        callCounter++;
+
+        System.out.println("La función '" + function.getNameFunction() + "' se ha llamado " + callCounter);
+
+        function.execute();
+
+    }
+}
+
+interface Notifier {
+    void send(String message);
+}
+
+class basicNotifier implements Notifier {
+
+    @Override
+    public void send(String message) {
+        System.out.println("Enviando notificacion básica por correo:  " + message);
+    }
+}
+
+abstract class BaseDecorator implements Notifier {
+    protected Notifier wrapper;
+
+    public BaseDecorator(Notifier notifier) {
+        this.wrapper = notifier;
+    }
+
+    @Override
+    public void send(String message) {
+        wrapper.send(message);
+    }
+}
+
+class SMSDecorator extends BaseDecorator {
+
+    public SMSDecorator(Notifier wrappee) {
+        super(wrappee);
+    }
+
+    @Override
+    public void send(String message) {
+        super.send(message);
+        sendSMS(message);
+    }
+
+    private void sendSMS(String message) {
+        System.out.println("Enviando notificacion mediante SMS: " + message);
+    }
+
+}
+
+class FacebookDecorator extends BaseDecorator {
+
+    public FacebookDecorator(Notifier wrappee) {
+        super(wrappee);
+    }
+
+    @Override
+    public void send(String message) {
+        super.send(message);
+        sendFacebook(message);
+    }
+
+    private void sendFacebook(String message) {
+        System.out.println("Enviando notificación mediante Facebook: " + message);
+    }
+
+}
+
+class SlackDecorator extends BaseDecorator {
+
+    public SlackDecorator(Notifier wrappee) {
+        super(wrappee);
+    }
+
+    @Override
+    public void send(String message) {
+        super.send(message);
+        sendSlack(message);
+    }
+
+    private void sendSlack(String message) {
+        System.out.println("Enviando notificación mediante Slack: " + message);
+    }
+
+}