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
creationalBuilderView pattern
structuralCompositeView pattern
Basics
Categorycreationalcreationalstructural
SummaryProvide an interface for creating families of related objects without specifying their concrete classes.Construct a complex object step by step so the same construction process can create different representations.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.Separate the construction of a complex object from its final representation.Compose objects into tree structures to represent part-whole hierarchies and let clients work with individual and composite objects through the same interface.
Decision factors
ProblemClient code needs to create families of related objects, but hardcoding concrete classes makes the code rigid and hard to swap.Constructing complex objects directly can make required steps, optional values, and validation hard to manage.A system needs to treat individual objects and groups of objects uniformly, but the hierarchy becomes difficult to manage with separate code paths.
Tradeoffs
  • Adds an extra abstraction layer.
  • Can overcomplicate simple object creation.
  • Makes family-wide swapping and consistency much easier.
  • Adds more classes or steps to the construction process.
  • Can be overkill for simple objects.
  • Improves clarity when object construction is complex or incremental.
  • 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.
Practical fit
Languages
  • typescript
  • java
  • python
  • react
  • angular
  • csharp
  • dotnet
  • typescript
  • python
  • java
  • react
  • angular
  • go
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • ui systems
  • integration layers
  • frontend
  • backend
  • integration
  • 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.Builder is most useful when construction must happen in controlled steps and the final object has many optional or ordered parts.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.