Encapsulation

Information hiding¶

• Information hiding is the principle of [[segregation]], of the design decisions in a computer program that are most likely to change, thus protecting other parts of the program from extensive modification if the design decision is changed.
• Information hiding is the ability to prevent certain aspects of a class or software component from being accessible to it's clients, using either programming language features (like private variables) or an explicit exporting policy.

Encapsulation¶

Encapsulation allows to reuse components without learning their internal details.

class Customer {
    public event EventHandler<Customer> CustomerReceived;

    public Resuilt PaySalary(decimal amount)
    {
        return Result.Success();
    }

    public Maybe<Customer> GetCustomer(int id)
    {
        // get instance from DB
        var customer = new Customer();
        return Maybe<Customer>.From(customer);
    }

    public Result RemoveCustomer(int id)
    {
        return Result.Success();
    }
}