Basic JCO Information

Question

I'm in the process of learning how to create custom business objects within the ISA framework.  I have been able to create a customer business object manager and a custom business object.
I'm attempting to call the BAPI_CURRENCY_GETLIST function module and return a list of all currencies that SAP supports.  I'm able to execute the function, but I'm confused what I need to do next.  From what I understand the getExportParameterList() call on a JCoFunction will allow me to access objects that the bapi call returns.
Again, the objective is very simple.  I'm trying to do is use the JCO object to return a list of currencies. 
Also, I'm rather confused when I should be using a Structure and when I should be using a Table.  I don't understand the differences between these two objects.
I appreciate the guidance, and thank you for being patient with me!

Answer 1

Hi Brian,
In simple word the difference between  JCO.Table and JCO.Structure is as follow.
A structure is basically a special case of a table that has exactly one row.
So in simple word when you know that your BAPI or RFC is going to return only one row or nothing then you can use JCO.Structur but if your BAPI/BADI or RFC will return more then 1 row then you have to use Table.
You can not handle more then 1 row with JCO.Structure.
So when there is a possiblilty that you can have more then one row use JCO.Table. If you are sure that BAPI/BADI or RFC will return only one row or nothing then use JCO.Structure.
I hope this information will clear your confusion about JCO.Table and JCO.Structure.
Regards.
eCommerce Developer.