Prototype
The Prototype design pattern is all about customization and creating objects that are similar but slightly different. To understand it better, Let's look at an example.
Imagine we have a system that manages users and their permissions. A data class representing a user might look like this:
data class User(
val name: String,
val role: Role,
val permissions: Set<String>,
) {
fun hasPermission(permission: String) = permission in permissions
}
Each user must have a role, and each role has a set of permissions.
We'll describe a role as an enum class:
enum class Role {
ADMIN,
SUPER_ADMIN,
REGULAR_USER
}
The enum classes are a way to represent a collection of constants. This is more convenient than representing a role as a string, for example, as...