Bridge

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Decouple abstraction from implementation. Separate an abstraction from its implementation so that the two can vary independently. Unlike adapter (which is applied after design), bridge is designed upfront.

Key Properties

• Abstraction and Implementor
• Independent Variation
• Platform Abstraction

Related

• Adapter (retrofitted, bridge is designed upfront)
• Strategy (similar structure, different intent)

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design-patterns structural bridge