Analysis

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Evaluate design patterns side by side across intent, tradeoffs, languages, and integration fit.

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralAdapterView pattern
structuralDecoratorView pattern
creationalPrototypeView pattern
Basics
Categorystructuralstructuralcreational
SummaryConvert the interface of a class or module into another interface clients expect.Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.—
IntentAllow incompatible interfaces to work together without changing the consuming code.Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.Specify the kinds of objects to create using a prototypical instance, and create new objects by cloning that prototype.
Decision factors
ProblemA client needs to talk to a legacy class or external service whose interface does not match the rest of the codebase.A system needs to add optional behaviors to an object without creating many subclasses for every feature combination.Creating new objects from scratch can be expensive or repetitive when the system needs many similar variants.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can hide useful vendor-specific capabilities if overused.
  • Keeps integration code isolated from core domain logic.
  • Can introduce many small wrapper classes that are harder to trace in debugging.
  • Ordering of decorators matters, so composition needs to be deliberate.
  • Keeps responsibilities modular and easy to combine.
  • 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
Practical fit
Languages
  • typescript
  • java
  • python
  • go
  • csharp
  • dotnet
  • react
  • angular
  • react-native
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • apis
  • service layers
  • integrations
  • frontend
  • backend
  • services
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesAdapters are useful when exposing a stable boundary over a legacy API, vendor SDK, or payload format mismatch.Decorators work well for cross-cutting concerns such as logging, retry, caching, compression, and telemetry because each layer keeps the same interface while adding one concern.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.