MENTAL MODEL · M0531

Factory Pattern

StructureHigh supportLogic

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Encapsulate change. In mental models, this means establishing an 'intermediate layer' to handle uncertainty. Do not directly depend on specific people or things (hard-coding), but rely on a 'generation mechanism'. When the environment changes, only the factory logic needs to be modified, without having to start over.

anchor

Anchor fast decisions

Define an interface for creating objects, deferring instantiation of concrete classes to subclasses or factory methods; the caller only depends on the abstract product, not the concrete implementation, thereby reducing coupling and encapsulating change points.

MINIMUM ACTION

In progress 0/4

Practice this model in one real situation:

Abstract the product interface
create concrete factories or factory methods for each product type
the caller obtains objects through the factory
when adding new products, only extend the factory rather than modifying the caller.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

link
en.wikipedia.orghttps://en.wikipedia.org/wiki/Factory_method_patternZH · Explicit
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