Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralFacadeView pattern
behavioralStrategyView pattern
behavioralTemplate MethodView pattern
Basics
Categorystructuralbehavioralbehavioral
SummaryProvide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.——
IntentProvide a simplified high-level interface that coordinates a complex subsystem behind a smaller and easier-to-use API.Encapsulate a family of algorithms or behaviors behind a common contract so they can be selected and swapped cleanly.Define the skeleton of an algorithm in a base class and let subclasses override selected steps without changing the overall structure.
Decision factors
ProblemA client needs to perform a recurring workflow that spans several subsystem classes, but direct coordination makes the code noisy and tightly coupled.A system needs to switch between interchangeable behaviors without hardcoding branching logic everywhere.Several classes share the same algorithm structure, but some steps need to vary between implementations.
Tradeoffs
  • 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.
  • Adds more moving parts than a direct conditional approach
  • Works best when behavior variations are real and likely to grow
  • 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
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • apis
  • service layers
  • Web
  • Backend
  • Services
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesFacades 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.Strategies can cross codebases through shared contracts, API selection rules, or runtime configuration.Template Method is useful when you have repeated workflows with a common sequence of steps, such as processing orders, generating reports, and importing data.