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
structuralAdapterView pattern
creationalBuilderView pattern
behavioralCommandView pattern
Basics
Categorystructuralcreationalbehavioral
SummaryConvert the interface of a class or module into another interface clients expect.Construct a complex object step by step so the same construction process can create different representations.Encapsulate a request as an object so it can be invoked, queued, logged, or undone independently of the receiver that performs the work.
IntentAllow incompatible interfaces to work together without changing the consuming code.Separate the construction of a complex object from its final representation.Encapsulate a request as an object so it can be invoked, queued, logged, or undone independently of the receiver that performs the work.
Decision factors
ProblemA client needs to talk to a legacy class or external service whose interface does not match the rest of the codebase.Constructing complex objects directly can make required steps, optional values, and validation hard to manage.A system needs to trigger actions without tightly coupling the code that requests an operation to the code that performs it, and it may also need queuing, history, or undo support.
Tradeoffs
  • Adds an extra layer of indirection.
  • Can hide useful vendor-specific capabilities if overused.
  • Keeps integration code isolated from core domain logic.
  • Adds more classes or steps to the construction process.
  • Can be overkill for simple objects.
  • Improves clarity when object construction is complex or incremental.
  • Introduces extra classes or objects for each action.
  • Can feel heavier than direct method calls when the workflow is simple.
  • Makes requests more flexible, loggable, and replayable.
Practical fit
Languages
  • typescript
  • java
  • python
  • go
  • csharp
  • dotnet
  • react
  • angular
  • react-native
  • typescript
  • python
  • java
  • react
  • angular
  • go
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • applications
  • apis
  • service layers
  • integrations
  • frontend
  • backend
  • integration
  • frontend
  • backend
  • integration
Integration notesAdapters are useful when exposing a stable boundary over a legacy API, vendor SDK, or payload format mismatch.Builder is most useful when construction must happen in controlled steps and the final object has many optional or ordered parts.Commands work well for UI actions, background jobs, workflow steps, and undoable operations because invokers can trigger commands without depending on receiver details.