Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralBridgeView pattern
behavioralInterpreterView pattern
behavioralIteratorView pattern
Basics
Categorystructuralbehavioralbehavioral
SummarySeparate an abstraction from its implementation so the two can vary independently.——
IntentDecouple abstractions from implementations so they can evolve independently.Represent grammar rules as objects and interpret sentences by evaluating an abstract syntax tree or expression chain.Provide a way to access elements of an aggregate sequentially while hiding the underlying representation.
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.You need to define a small language or expression grammar and evaluate it consistently across the application.A collection needs to be traversed without exposing how it is stored internally.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can increase the number of moving parts.
  • Makes abstractions and implementations easier to evolve independently.
  • Can become complex if the grammar grows too large.
  • Best suited to small, well-defined languages or expression sets.
  • Can add extra classes and abstraction for simple collections
  • May be unnecessary when built-in language iteration is already enough
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
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesBridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets.Interpreter is useful for calculators, rule engines, simple DSLs, and command parsing systems where a structured grammar must be evaluated.Iterator is useful for pagination, custom collections, ordered traversal, and any case where clients should not know the internal data structure.