Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
creationalAbstract FactoryView pattern
structuralBridgeView pattern
behavioralStateView pattern
Basics
Categorycreationalstructuralbehavioral
SummaryProvide an interface for creating families of related objects without specifying their concrete classes.Separate an abstraction from its implementation so the two can vary independently.—
IntentProvide an interface for creating families of related objects without specifying their concrete classes.Decouple abstractions from implementations so they can evolve independently.Allow an object to alter its behavior when its internal state changes by delegating state-specific behavior to separate state objects.
Decision factors
ProblemClient code needs to create families of related objects, but hardcoding concrete classes makes the code rigid and hard to swap.When an abstraction is tightly coupled to its implementation, changing one side forces changes in the other and makes the system harder to evolve.An object behaves differently depending on its internal state, and conditional logic is becoming hard to manage.
Tradeoffs
  • Adds an extra abstraction layer.
  • Can overcomplicate simple object creation.
  • Makes family-wide swapping and consistency much easier.
  • Adds an extra layer of indirection.
  • Can increase the number of moving parts.
  • Makes abstractions and implementations easier to evolve independently.
  • Can introduce many small classes if the state graph is large
  • State transitions may become harder to trace if spread across multiple classes
Practical fit
Languages
  • typescript
  • java
  • python
  • react
  • angular
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • go
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • ui systems
  • integration layers
  • web
  • backend
  • mobile
  • integration
  • ui
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesAbstract Factory is especially useful when your app must produce matching sets of related objects for a theme, provider, platform, or pipeline.Bridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets.State is useful for workflows, media players, order lifecycles, and any domain where behavior changes as the object moves through a lifecycle.