Ejercicio #23 completado

Roadmap/23 - SINGLETON/java/simonguzman.java

@@ -1,8 +1,60 @@
+
 public class simonguzman {
     public static void main(String[] args) {
         genericSingleton();
+        additionalExercise();
+    }
+    /**************************** Ejercicio adicional ****************************/
+    public static void additionalExercise(){
+        UserSession session = UserSession.getUserInstance();
+        session.assignUser("001", "Simon Guzman", "sguzman", "[email protected]");
+        System.out.println(session.getUserData());
+        session.deleteSession();
+        System.out.println(session.getClass());
+    }
+
+    public static class UserSession{
+        private static UserSession instance;
+
+        private String id;
+        private String name;
+        private String userName;
+        private String email;
+
+        private UserSession(){
+
+        }
+
+        public static UserSession getUserInstance(){
+            if(instance == null){
+                instance = new UserSession();
+            }
+            return instance;
+        }
+
+        public void assignUser(String id, String name, String userName, String email){
+            this.id = id;
+            this.name = name;
+            this.userName = userName;
+            this.email = email;
+        }
+
+        public String getUserData(){
+            if (id == null){
+                return "No hay usuarios en la sesion";
+            }
+            return "ID: "+id+" ,username: " + userName + " ,name: " + name + " ,email: " + email;
+        }
+
+        public void deleteSession(){
+            id = null;
+            name = null;
+            userName = null;
+            email = null;
+        }
     }
 
+    /**************************** Ejemplo de singleton ****************************/
     public static void genericSingleton(){
         Singleton singleton = Singleton.getInstance();
         singleton.showMessage();