Introduction to OOPS using Salesforce

Introduction to Salesforce Apex

- What is Salesforce apex?
  - Salesforce Apex is a programming language used to develop custom functionalities and business logic in the Salesforce platform. Think of it as a tool that allows developers to create custom solutions that are specific to a particular business’s needs within the Salesforce environment.
- Use of Salesforce apex
  - With Salesforce Apex, developers can create custom objects, automate business processes, create custom user interfaces, and integrate Salesforce with other systems. In simple terms, Apex is a way to extend the capabilities of the Salesforce platform to meet the unique needs of a business.

OOPs Concept

- Object
- Class
- Abstraction
- Inheritance
- Polymorphism
- Encapsulation

What is an Object?

Any real-world entity that has a state and behavior is known as an object. For example, a chair, pen, table, keyboard, bike, etc.
It can be physical or logical.
A Cat is an Object because it has color, height, and weight as state and speaks, walks, and sleeps as behavior
A table or chair is also an object because it has color, height, width &, etc.

What is a Class

→ A-Class is a Collection of Objects is a class. For Example, Vehicles, Tree, Animal
→ Class can also be defined as a blueprint from which we can create multiple individual objects.

Abstraction (What the object does)

Hiding internal (implementation) details and exposing/showcasing only the functionality is known as abstraction.
For example tv, We do not what happens behind the scene

Inheritance

When a child object acquires all the properties (variables/methods) from a parent object then it is known as inheritance.

Polymorphism

When the same task is done in a different way then it is known as Polymorphism. For Example, speaking, walking, convincing customers, playing football, youtube sessions, teaching

Encapsulation (How the Object does)

Wrapping hiding/code (Putting together) and data together into a single unit is known as encapsulation.
For example, a capsule is wrapped with different medicines.
In Salesforce, class is a perfect example of encapsulation.

DRY Principle
- Do not repeat yourself

SOLID Principle (Intro)

- S – Single Responsibility Principle (SRP)
- O – Open-Closed Principle
- L – Liskov’s Substitution Principle
- I – Interface Segregation Principle
- D – Dependency Inversion Principle