如何在序列图中描述继承？ [英] How will inheritance is depicted in a sequence diagram?

问题描述

类A的方法m在类B上调用方法n，但类B的源代码不包含n，因为n是从B的一个超类继承的。

Say method m of class A calls method n on class B, but the source code of class B does not contain n, since n is inherited from one of the superclasses of B.

序列图将如何显示？

方法n之间是否存在A和B之间的消息交互，或者它是否与A和超类B用方法n

Will there be message interaction between A and B by the method n or would it be with A and the superclass of B with by method n

推荐答案

如果你要尊重封装的原则，那么交互就完全在<$ c之间$ c> A 和 B 。 B 的实现使用继承的事实与用 A 编写的代码无关 - 它是唯一的世界观是它在 B 上调用方法。

If you're to respect the principle of encapsulation, the interaction would purely be between A and B. The fact that B's implementation uses inheritance is of no concern to the code written in A - it's sole world view is that it calls the method on B.

您可以安全地更改中的实现B 且不影响 A 。这是以这种方式绘制交互的另一个原因。

You can safely change the implementation in B and not affect A. This is another reason to diagram the interactions this way.

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