Builder Pattern

Kind: pattern

Layer: Design Patterns Core

Record: architecture:builder-pattern

Severity: recommended

Scope: object construction, API

Canonical: Ontology

A design pattern that assembles a complex object step by step through named calls and validates it when it is built.

Listed in Architecture principles, after Abstract Factory Pattern and before Prototype Pattern.

Requires

• Complex Construction

Reinforces

• Intent-Revealing Interface

Enables

• Valid Object Creation

Conflicts with

• Telescoping Constructor

In tension with

• Boilerplate

Tensions

• Builder Pattern / Boilerplate

Violated by

• Telescoping Constructor

Severity

• recommended

Category

• Creational Patterns

Refactors

• Long Parameter List

Linked from

• Anti-patterns
• Schema / Canonical Data / Semantics
• Core Vocabulary
• Creational Patterns
• Severity levels
• The resolutions