Multiple Inheritance in Module Development

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Pedro Ortelani asked Mar 2, '20 Pedro Ortelani edited Mar 4, '20

Multiple Inheritance in Module Development

I am trying to create a class that creates and destroys flowitems, my first approach would be making a class that inherits from Source and Sink, and call their methods based on the input/output nodes values.

But I am getting a compiler error on the return new Class on the createodtderivative method, because it has ambiguous base class ObjectDataType.

Is it possible to use Multiple Inheritance in Module Development?

If no, would the best solution be creating a custom Fixed Resource from scratch with both Source and Sink functionalities?

Thanks!

Software Version:

FlexSim 20.0.2

module sdk development

Answer 1 · 2020-03-02T17:57:03Z

Jordan Johnson answered Mar 2, '20 Pedro Ortelani commented Mar 2, '20

Hi Pedro,

In order to create and destroy flowitems, you don't need to inherit from either the source or the sink. To create a flowitem, all you need to do is use createcopy() to copy something in the flowitem bin. To destroy a flowitem, you can use the treenode's destroy method, called on the flowitem. In your case, you should just inherit FixedResource.

In some cases, you can use multiple inheritance in module development. However, since the Source and Sink class both inherit from FixedResource, you can't. It's called the diamond problem, and we haven't written our code to allow you to work around this issue.

· 1

Pedro Ortelani commented · Mar 02, 2020 at 06:00 PM

Understood! Thanks for the information!

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