Validating JSON messages against Swagger definitio

Question

I created a REST API using a Swagger definition, now I need to validate incoming messages using that swagger schema. I found several solutions however all of them rely on some specific use case. The closest to what I need is this and true to it's description it works well with provided json schema, however when I deliver much more complex swagger definition, it just marks everything as valid. My question is. Is there any better, more complete or competent solution, library perhaps, that would natively validate given JSON messages against Swagger definition? I need this because I'm implementing WSO2 API REST solution and this would greatly help.