26 lines
654 B
Markdown
26 lines
654 B
Markdown
---
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layout: pattern
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title: Double Dispatch
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folder: double-dispatch
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permalink: /patterns/double-dispatch/
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categories: Idiom
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tags:
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- Extensibility
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---
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## Intent
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Double Dispatch pattern is a way to create maintainable dynamic
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behavior based on receiver and parameter types.
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## Class diagram
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## Applicability
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Use the Double Dispatch pattern when
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* the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type.
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## Real world examples
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* [ObjectOutputStream](https://docs.oracle.com/javase/8/docs/api/java/io/ObjectOutputStream.html)
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