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Composite template with bi-directional linkage between component and composite

I have the problem mentioned in the title of this post. By default, the Composite Pattern has an explicit implementation of the Composite → Component association. But I also need to implement backward merging: Component -> Composite.

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In short, what's the best solution for bi-directional communication between a component and a composite object in a composite template?

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You only need communication between the component and itself, and call this "parent"

With this construct, all sheets and composites will have a reference to its parent, which means Composite -> Component association



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