Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralBridgeView pattern
behavioralChain of ResponsibilityView pattern
structuralDecoratorView pattern
Basics
Categorystructuralbehavioralstructural
SummarySeparate an abstraction from its implementation so the two can vary independently.Pass a request through a sequence of handlers until one handles it or the chain ends.Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.
IntentDecouple abstractions from implementations so they can evolve independently.Pass requests along a chain of handlers until one of them handles the request or the request reaches the end of the chain.Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.
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.A request must pass through multiple possible handlers, but the sender should not need to know which handler will process it.A system needs to add optional behaviors to an object without creating many subclasses for every feature combination.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can increase the number of moving parts.
  • Makes abstractions and implementations easier to evolve independently.
  • Requests can become harder to trace because control flows through multiple handlers.
  • A long chain may add overhead if many handlers are checked on every request.
  • It keeps handler logic isolated and easier to extend.
  • 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.
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
  • frontend
  • backend
  • integration
  • frontend
  • backend
  • services
Integration notesBridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets.Chain of Responsibility is useful for validation pipelines, support routing, approval flows, and any system where requests may be processed by different handlers in sequence.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.