loop on list of integration component

In my workflow I have a step where a web service is invoked.
The output of this web service is an integration object.
I create a custom integration object with a simplified structure to obtain a quick access to data values.
In a datamap step I do the mapping between the web service's integration object and my custom integration object.

Now in my integration object , I can have n instances of the same integration component.

I need to loop on this list of integration component to obtain values contained in each instance of integration component.

How can I do this ? Can you give me some example ?