# Decorator Pattern

Record: `arch:decorator-pattern`
Kind: pattern
Layer: [Design Patterns Core](https://banes-lab.com/records/layer/design-patterns-core.md)
Severity: contextual
Scope: behavior composition
Canonical: https://banes-lab.com/ontology#arch-decorator-pattern

## Repair

- Refactored by: Introduce Decorator
- Detected by: repeated wrapper-like subclasses
- Violated by: many subclasses for optional features
- Measured by: variant explosion count
- Enforced by: interface conformance tests

## requires

- [Common Interface](https://banes-lab.com/records/lex/common-interface.md)

## reinforces

- [Open/Closed Principle (OCP)](https://banes-lab.com/records/arch/open-closed.md)
- [Composability](https://banes-lab.com/records/arch/composability.md)

## enables

- [Runtime Behavior Extension](https://banes-lab.com/records/lex/runtime-behavior-extension.md)

## conflicts-with

- [Subclass Explosion](https://banes-lab.com/records/lex/subclass-explosion.md)

## tensions-with

- [Stack Debugging](https://banes-lab.com/records/lex/stack-debugging.md)

## tensions

- [Decorator Pattern Stack Debugging](https://banes-lab.com/records/tension/decorator-pattern-stack-debugging.md)

## referenced-by

- [Composition Over Inheritance](https://banes-lab.com/records/arch/composition-over-inheritance.md)