# Adapter Pattern

> A design pattern that wraps a component with an incompatible interface so it implements the interface its callers expect.

Record: `architecture:adapter-pattern`
Kind: pattern
Layer: [Design Patterns Core](https://banes-lab.com/records/layer/design-patterns-core.md)
Severity: mandatory
Scope: integration, boundary
Canonical: https://banes-lab.com/ontology#architecture-adapter-pattern

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Singleton Pattern](https://banes-lab.com/records/architecture/singleton-pattern.md) and before [Facade Pattern](https://banes-lab.com/records/architecture/facade-pattern.md).

## Repair

- Refactored by: Add Adapter, Add Translator
- Detected by: external SDK types in domain/application
- Violated by: foreign model leaking into core
- Measured by: external leakage count
- Enforced by: boundary import rules

## Requires

- [Incompatible Interfaces](https://banes-lab.com/records/lexicon/incompatible-interfaces.md)

## Reinforces

- [Anti-Corruption Layer](https://banes-lab.com/records/architecture/anti-corruption-layer.md)
- [Replaceability](https://banes-lab.com/records/architecture/replaceability.md)

## Enables

- [Interoperability](https://banes-lab.com/records/architecture/interoperability.md)

## Conflicts with

- [Direct External Coupling](https://banes-lab.com/records/lexicon/direct-external-coupling.md)

## In tension with

- [Mapping Overhead](https://banes-lab.com/records/lexicon/mapping-overhead.md)

## Tensions

- [Adapter Pattern / Mapping Overhead](https://banes-lab.com/records/tension/adapter-pattern-mapping-overhead.md)

## Severity

- [mandatory](https://banes-lab.com/records/vocabulary/severity-mandatory.md)

## Category

- [Structural Patterns](https://banes-lab.com/records/architecture-category/structural-patterns.md)

## Enabled by

- [Interface-Based Design](https://banes-lab.com/records/architecture/interface-based-design.md)

## Linked from

- [Semantic operations](https://banes-lab.com/pag/guide/tool-invocation.md)
- [Agents as executed contracts](https://banes-lab.com/disciplined-methodology/collaborate/agents-as-executed-contracts.md)
- [Domain Architecture](https://banes-lab.com/ontology/principles/architecture-category-domain-architecture.md)
- [Contracts / Interfaces / Compatibility](https://banes-lab.com/ontology/principles/architecture-category-contracts-interfaces-compatibility.md)
- [Core Modular Design](https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.md)
- [Plugin / Extensibility / IoC](https://banes-lab.com/ontology/principles/architecture-category-plugin-extensibility-ioc.md)
- [Quality Attributes](https://banes-lab.com/ontology/lexicon/lexicon-category-quality-attributes.md)
- [Structural Patterns](https://banes-lab.com/ontology/lexicon/lexicon-category-structural-patterns.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)