Practical Design Patterns for Java Developers by Miroslav Wengner

Author:Miroslav Wengner
Language: eng
Format: epub
Publisher: Packt
Published: 2023-11-15T00:00:00+00:00

Figure 4.2 – The UML class diagram shows how the Engine interface bridges access to a specific implementation

The engines already behave differently, and due to the bridge they may continue evolving (Example 4.6):

class DieselEngine implements Engine{ ... @Override public void turnOff() {...} } class PetrolEngine implements Engine{ ... @Override public void turnOff() { selfCheck(); ... } private void selfCheck(){ ...} }

Example 4.6 – The engines differ in implementation

The vehicle abstraction does not have any engine implementation details, which may vary even in the class hierarchy. The vehicle only needs to rely on the provided interface.

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