Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
creationalAbstract FactoryView pattern
behavioralInterpreterView pattern
structuralProxyView pattern
Basics
Categorycreationalbehavioralstructural
SummaryProvide an interface for creating families of related objects without specifying their concrete classes.——
IntentProvide an interface for creating families of related objects without specifying their concrete classes.Represent grammar rules as objects and interpret sentences by evaluating an abstract syntax tree or expression chain.Provide a surrogate or placeholder for another object to control access to it.
Decision factors
ProblemClient code needs to create families of related objects, but hardcoding concrete classes makes the code rigid and hard to swap.You need to define a small language or expression grammar and evaluate it consistently across the application.A client needs to interact with an object indirectly because the real object may be expensive, sensitive, or remote.
Tradeoffs
  • Adds an extra abstraction layer.
  • Can overcomplicate simple object creation.
  • Makes family-wide swapping and consistency much easier.
  • Can become complex if the grammar grows too large.
  • Best suited to small, well-defined languages or expression sets.
  • Adds another layer of indirection
  • Can make the design more complex when the extra control is unnecessary
Practical fit
Languages
  • typescript
  • java
  • python
  • react
  • angular
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • ui systems
  • integration layers
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesAbstract Factory is especially useful when your app must produce matching sets of related objects for a theme, provider, platform, or pipeline.Interpreter is useful for calculators, rule engines, simple DSLs, and command parsing systems where a structured grammar must be evaluated.Proxy is useful for lazy loading, access control, caching, logging, and remote service wrappers.