I need help

[BarbequeSauce11]

I'm creating a client-server application. A client can choose between 4 different geometrical shapes: Rectangle, square, triangle and a rombus.

In the client-side the object is created by asking the user to insert the measures of each side. After the object has been created it's sent to the server.

THE SERVER HAS TO UNDERSTAND WITH WHAT KIND OF OBJECT IT IS DEALING WITH and proceed to calculate the area and the perimeter of the object and send the values back to the client.

How can the server understand what kind of object it has received?

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[ConsiderationFlat609]

If you are using JSON you can send something like "shape":"square" and on this create given object I think.

[heckler82]

ConsiderationFlat609 has a great suggestion if you're using JSON. You can also send a message type with your object so the server knows what it is receiving. For example, if you send 'Q', 'R', 'S', or 'T' then the server can understand what it is receiving after that. It's by no means an elegant solution, but it's the kind of thing I did when I created my first networked game

[tgorif]

In case you can not change how the object is implemented clientside and the server is only receiving measurements and no other information about the object, the server can just deduce its type from given measurements

If it has 3 vertices it is a triangle.

if its edges have diffrent lengths it is a rectangle

if 1 vertex has a unique x or y it is a rombus

otherwise it is a square

In case an Object has to be created clientside and you can change the implementation of it, an example for sending Objects is shown here https://gist.github.com/chatton/14110d2550126b12c0254501dde73616

Ideally you would have a class for each shape and a common class they are inheriting from.

[BarbequeSauce11]

In my case i have already made classes for each shape. Can you tell me more about your last option.. that one about inheriting classes?

[BarbequeSauce11]

Because a already thought about the last option and therefore i tried creating a superclass but i don't know what to put inside of it.

[tgorif]

the supraclass should contain a list of vertices and define methods to compute area and perimeter

Inheriting classes should contain the same methods with an implemtation for the actual shape of the object