Analysis

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Evaluate design patterns side by side across intent, tradeoffs, languages, and integration fit.

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralCompositeView pattern
behavioralInterpreterView pattern
behavioralStrategyView pattern
Basics
Categorystructuralbehavioralbehavioral
SummaryCompose objects into tree structures to represent part-whole hierarchies and let clients work with individual and composite objects through the same interface.——
IntentCompose objects into tree structures to represent part-whole hierarchies and let clients work with individual and composite objects through the same interface.Represent grammar rules as objects and interpret sentences by evaluating an abstract syntax tree or expression chain.Encapsulate a family of algorithms or behaviors behind a common contract so they can be selected and swapped cleanly.
Decision factors
ProblemA system needs to treat individual objects and groups of objects uniformly, but the hierarchy becomes difficult to manage with separate code paths.You need to define a small language or expression grammar and evaluate it consistently across the application.A system needs to switch between interchangeable behaviors without hardcoding branching logic everywhere.
Tradeoffs
  • Can make the design more abstract and harder to follow.
  • May require careful handling of operations that only apply to some nodes in the tree.
  • Makes recursive tree operations and client code much simpler.
  • Can become complex if the grammar grows too large.
  • Best suited to small, well-defined languages or expression sets.
  • Adds more moving parts than a direct conditional approach
  • Works best when behavior variations are real and likely to grow
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
  • web
  • backend
  • mobile
  • ui kits
  • cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Services
Integration notesComposite is useful when a hierarchy of nested objects should expose a common interface, such as files and folders, menus and submenus, org charts, widget trees, or scene graphs.Interpreter is useful for calculators, rule engines, simple DSLs, and command parsing systems where a structured grammar must be evaluated.Strategies can cross codebases through shared contracts, API selection rules, or runtime configuration.