CaaS for a page content in aem

Is there any way to display content of a  page like a sling model json. For example : if i have a page "/content/my-site/homepage" & it contains three components a,b,c . Each component has a sling model. if i hit the component path("/content/my-site/homepage/jcr:content/a.model.json") directly with .model.json extension then it will give a json view of that component as i'm using jackson exporter in sling model. i want to display the json of all the components when i hit the page with any extension. like if i hit "/content/my-site/homepage.model.json" then it will give combined json of all the three components .There is a option to use infinity.json but t gives node structure as a json not a sling model & i don't want to use content fragments or i have  to develop a custom solution for this (using servlet and invoke it on the basis of selctor).