How to get JSON metadata of a class in Spring Boot

Question

I'm trying to get metadata in JSON format of a class in Spring Boot, but I don't really know how to start. I have created my class, that is a random one, just to make some attempt. Can someone show me some examples?

@RequestMapping(value = "/meta", method = RequestMethod.GET) 
public String getMetadata(HttpServletResponse response) throws Exception {
    ObjectMapper mapper = new ObjectMapper(); 
    SchemaFactoryWrapper visitor = new SchemaFactoryWrapper();  
    mapper.acceptJsonFormatVisitor(Catasto.class, visitor); 
    JsonSchema schema = visitor.finalSchema(); 
    return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(schema);
}