Validate JSon again Json Schema file

It is quite important that you can quickly validate that a given Json string complies with a required JSON schema. You would not want to built your own custom for-each loop and check that each attribute is there or not.

If you for example build an API or similar these days you can use Rest specifications like RAML. Doing so has a lot of advantages, for example code generation, easy to understand for 3rd parties or self-explaining with built in examples. However it all relies on being able to quickly validate a Json string against a schema definition.

Unfortunately there is no good Java Json Schema validator. Neither in Gson nor in any 3rd party library. It would be really useful if this is part of the Gson framework.