Builder

Builder

ND079 JPND C2 L03 A08 Builder V3

What is a Builder?

A mutable factory that constructs the state of a to-be-created object, property by property, and then builds the object.
Usually supports method chaining.
Often used to create immutable data objects.

SOLUTION:

Lets you create mutable versions of immutable objects.
Holds state that can be mutated before building an object.
Can improve the API for object creation, especially when the class being instantiated has lots of constructor parameters.

QUIZ QUESTION::

Match each creational design pattern with its description.

ANSWER CHOICES:

Description	Pattern
A static method that hides construction details, such as `Stream.of(...)`.
An object that creates other objects, and hides the construction details.
A mutable factory that represents the state of a to-be-created object.

SOLUTION:

Description	Pattern
An object that creates other objects, and hides the construction details.
A static method that hides construction details, such as `Stream.of(...)`.
A mutable factory that represents the state of a to-be-created object.