Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralBridgeView pattern
creationalPrototypeView pattern
behavioralTemplate MethodView pattern
Basics
Categorystructuralcreationalbehavioral
SummarySeparate an abstraction from its implementation so the two can vary independently.——
IntentDecouple abstractions from implementations so they can evolve independently.Specify the kinds of objects to create using a prototypical instance, and create new objects by cloning that prototype.Define the skeleton of an algorithm in a base class and let subclasses override selected steps without changing the overall structure.
Decision factors
ProblemWhen an abstraction is tightly coupled to its implementation, changing one side forces changes in the other and makes the system harder to evolve.Creating new objects from scratch can be expensive or repetitive when the system needs many similar variants.Several classes share the same algorithm structure, but some steps need to vary between implementations.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can increase the number of moving parts.
  • Makes abstractions and implementations easier to evolve independently.
  • Can be difficult if the object graph contains deep references that need custom clone behavior
  • May require careful handling of mutable state to avoid shared-reference bugs
  • Relies on inheritance, which can be less flexible than composition in some designs
  • May create a deep class hierarchy if many variations are needed
Practical fit
Languages
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • go
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • web
  • backend
  • mobile
  • integration
  • ui
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesBridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets.Prototype is useful when object creation is expensive, when many near-identical objects are needed, or when cloning preconfigured templates is simpler than rebuilding them.Template Method is useful when you have repeated workflows with a common sequence of steps, such as processing orders, generating reports, and importing data.