# Polymorphism

Record: `arch:polymorphism`
Kind: mechanism
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Severity: recommended
Scope: class, interface, runtime
Canonical: https://banes-lab.com/ontology#arch-polymorphism

## Repair

- Refactored by: [Replace Conditional with Polymorphism](https://banes-lab.com/records/lex/replace-conditional-with-polymorphism.md)
- Detected by: conditional type checks, duplicated branching
- Violated by: instanceof/switch dispatch over types
- Measured by: polymorphic dispatch ratio
- Enforced by: [code review](https://banes-lab.com/records/arch/code-review.md), static analysis rules

## requires

- [Abstraction](https://banes-lab.com/records/arch/abstraction.md)
- [Substitutability](https://banes-lab.com/records/lex/substitutability.md)

## reinforces

- [Open/Closed Principle (OCP)](https://banes-lab.com/records/arch/open-closed.md)
- [Strategy Pattern](https://banes-lab.com/records/arch/strategy-pattern.md)

## enables

- [Dynamic Dispatch](https://banes-lab.com/records/arch/dynamic-dispatch.md)
- [Interchangeability](https://banes-lab.com/records/arch/interchangeability.md)

## conflicts-with

- [Type Switching](https://banes-lab.com/records/lex/type-switching.md)

## tensions-with

- [Traceability](https://banes-lab.com/records/arch/traceability.md)

## tensions

- [Polymorphism Traceability](https://banes-lab.com/records/tension/polymorphism-traceability.md)

## referenced-by

- [Strategy Pattern](https://banes-lab.com/records/arch/strategy-pattern.md)
- [State Pattern](https://banes-lab.com/records/arch/state-pattern.md)
- [Null Object Pattern](https://banes-lab.com/records/arch/null-object-pattern.md)
- [Abstraction](https://banes-lab.com/records/arch/abstraction.md)
- [Interchangeability](https://banes-lab.com/records/arch/interchangeability.md)
- [Dynamic Binding](https://banes-lab.com/records/arch/dynamic-binding.md)
- [Dynamic Dispatch](https://banes-lab.com/records/arch/dynamic-dispatch.md)
- [Liskov Substitution Principle (LSP)](https://banes-lab.com/records/arch/liskov-substitution.md)