polymorphism code example

Example 1: what is polymorphism

The word polymorphism means having many forms. In simple words, we can define polymorphism as the ability of a message to be displayed in more than one form. Real life example of polymorphism: A person at the same time can have different characteristic. Like a man at the same time is a father, a husband, an employee.

Example 2: what is polymorphism

POLYMORPHISM: It is an ability of object to behave in multiple
form. The most common use of polymorphism is Java, when a
parent class reference type of variable is used to refer to a child
class object.
In my framework
  E.g.: WebDriver driver = new ChromeDriver();
We use method overloading and overriding to achieve
Polymorphism.

There are two types of achieving Polymorphism
Upcasting & Downcasting
Upcasting is casting a subtype to a supertype, 
going up in the inheritance tree.
It is done implicitly
 in order to use method available on any
 interface/class, the object should be of
 same class or of class implementing the interface.  
   WebDriver driver = new ChromeDriver();
or
	TakeScreenShot ts = new ChromeDriver();
    
    Downcasting is casting to a subtype, 
going down in the inheritance tree.
It is done to access sub class features.
It has to be done manually

ChromeDriver driver = (ChromeDriver)Webdriver;

Example 3: Polymorphisim

Polymorphism means objects behave in different forms. 
■ It occurs when parent class/interface 
calls to child class' objects 
Sub class can never be the reference type of Super Class Object
■ The reference of an object decides what is accessible.
■ Abstract class and interface are meant to be reference type,
CAN NEVER BE IN OBJECT TYPE
Static polymorphism. Ex: method overloading.  
Dynamic polymorphism Ex: method overriding 
EXAMPLE: WebDriver driver = new ChromeDriver(); 
driver.get()-> chrome, firefox
we are initializing Chrome browser using 
Selenium WebDriver. It also means we are creating 
a reference variable (driver) of the interface (WebDriver) 
and creating an Object (from ChromeDriver class). 
I am using Polymorphism In my framework in Driver Class. 
By making return type WebDriver I will be able to return 
ChromeDriverObject and FireFoxDriverObject. That’s how I achieve 
multi browser testing.
Reference type decides what can be called or accessed
WebDriver driver = getDriver();
getDriver() ==> chrome, firefox, ...
        
List<WebElement> list = new ArrayList<>();
List being reference to ArrayList. List is a super type of ArrayList. 
Map being reference to HasMap. Set is being reference to HashSet.

Example 4: polymorphic

for(Shape shape : shapes)
         if(shape instanceof Circle)
         {
            Circle c = (Circle) shape; // cast to a circle
            c.draw(g);     // call the circle's draw method
         }
         else if(shape instanceof Rect)
         {
            Rect r = (Rect) shape;
            r.draw(g);
         }

Example 5: neomorphism

border-radius: 50px;
background: linear-gradient(145deg, #4da7db, #5bc6ff);
box-shadow:  23px 23px 52px #4aa1d3, 
             -23px -23px 52px #60d1ff;

Example 6: where do you use polymorphism in framework

HOW DO YOU IMPLEMENT POLYMORPHISM IN YOUR FRAMEWORK

Set<Integer> set1 = new HashSet<>();
Map<Integer> set2 = new HashMap<>();
List<Integer> mySet = new ArrayList<>();

JavaScriptExecuter js = (JavaScriptExecuter)Driver.getDriver;
TakeScreenshot screen = (TakeScreenshot)Driver.getDriver;

WebDriver driver = new ChromeDriver();
WebDriver driver = new FirefoxDriver();

AppiumDriver driver = new AndroidDriver();