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GeezerVison is showing github.com — java-design-patterns/double-dispatch at master · tmollard/java-design-patterns

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README.md

Outline
layout pattern
title Double Dispatch
folder double-dispatch
permalink /patterns/double-dispatch/
categories Idiom
tags
Extensibility

Intent

Double Dispatch pattern is a way to create maintainable dynamic behavior based on receiver and parameter types.

Class diagram

alt text

Applicability

Use the Double Dispatch pattern when

  • the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type.

Real world examples

  • ObjectOutputStream
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