Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralBridgeView pattern
creationalBuilderView pattern
structuralFacadeView pattern
Basics
Categorystructuralcreationalstructural
SummarySeparate an abstraction from its implementation so the two can vary independently.Construct a complex object step by step so the same construction process can create different representations.Provide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.
IntentDecouple abstractions from implementations so they can evolve independently.Separate the construction of a complex object from its final representation.Provide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.
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.Constructing complex objects directly can make required steps, optional values, and validation hard to manage.A client needs to perform a recurring workflow that spans several subsystem classes, but direct coordination makes the code noisy and tightly coupled.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can increase the number of moving parts.
  • Makes abstractions and implementations easier to evolve independently.
  • Adds more classes or steps to the construction process.
  • Can be overkill for simple objects.
  • Improves clarity when object construction is complex or incremental.
  • Can become a dumping ground if boundaries are unclear.
  • May obscure useful lower-level capabilities from advanced consumers.
  • Simplifies the most common entry points for the system.
Practical fit
Languages
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • go
  • typescript
  • python
  • java
  • react
  • angular
  • go
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • web
  • backend
  • mobile
  • integration
  • ui
  • frontend
  • backend
  • integration
  • applications
  • apis
  • service layers
Integration notesBridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets.Builder is most useful when construction must happen in controlled steps and the final object has many optional or ordered parts.Facades are useful when exposing a stable boundary over a multi-service or mixed-language backend, or when presenting a consistent UI entry point over multiple readiness checks.