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
structuralCompositeView pattern
behavioralInterpreterView pattern
Basics
Categorycreationalstructuralbehavioral
SummaryProvide an interface for creating families of related objects without specifying their concrete classes.Compose objects into tree structures to represent part-whole hierarchies and let clients work with individual and composite objects through the same interface.—
IntentProvide an interface for creating families of related objects without specifying their concrete classes.Compose 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.
Decision factors
ProblemClient code needs to create families of related objects, but hardcoding concrete classes makes the code rigid and hard to swap.A 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.
Tradeoffs
  • Adds an extra abstraction layer.
  • Can overcomplicate simple object creation.
  • Makes family-wide swapping and consistency much easier.
  • 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.
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.Composite 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.