Analysis

Compare patterns

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

Choose patterns

Select up to 3 patterns

Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

Current selection

3 of 3 selected

You can now review the differences across the comparison table below.

Clear all

Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
structuralDecoratorView pattern
behavioralMediatorView pattern
creationalSingletonView pattern
Basics
Categorystructuralbehavioralcreational
SummaryWrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.——
IntentWrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.Define an object that encapsulates communication between a set of objects, keeping them from referring to each other directly.Ensure a class has only one instance and provide a global access point to it.
Decision factors
ProblemA system needs to add optional behaviors to an object without creating many subclasses for every feature combination.Multiple objects need to coordinate behavior, but direct references between them create tight coupling and complex dependencies.A system needs exactly one shared instance of a class, and that instance must be globally accessible without allowing uncontrolled duplication.
Tradeoffs
  • Can introduce many small wrapper classes that are harder to trace in debugging.
  • Ordering of decorators matters, so composition needs to be deliberate.
  • Keeps responsibilities modular and easy to combine.
  • The mediator can become large and complex if it takes on too much coordination logic.
  • Centralizing behavior can make the mediator a single point of failure if it is poorly designed.
  • Can make dependencies harder to test if the singleton is used everywhere
  • May introduce hidden global state that complicates debugging and concurrency
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
  • frontend
  • backend
  • services
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
Integration notesDecorators work well for cross-cutting concerns such as logging, retry, caching, compression, and telemetry because each layer keeps the same interface while adding one concern.Mediator is useful for chat systems, form coordination, workflow orchestration, and any domain where many components must collaborate without knowing about each other.Singleton is useful for centralized services like configuration, logging, caching, and shared application state.