analysis aspect based sentiment analysis

The Aylien text mining extension has a built-in aspect-based sentiment operator, you can check that to see whether the domain you are interested in is covered.  If it is not, then you would probably have to create your own custom operator or process to cover it.  

Thanks but where do i start from

i did make an operator using the instruction given in this website

http://docs.rapidminer.com/developers/creating-your-own-extension/your-own-operator/

should i have to start from sentiment analysis

or should i have to set parameters first

i am confused 

I think where you start is a matter of personal 'coding' preference. You could always take a look at the operators that are published on GitHub here.