Java. Validate SOAP message against a WSDL

I need to validate a SOAP message against a WSDL? (in the same way that an XML file can be validated against a XSD schema).

I am not calling any webservice; I just have a SOAP message and a WSDL, and I need to verify that the SOAP message is correct. without calling the webservice or whatsoever afterwards.

I need to make this validate within a Java program. Do you know of a small Java library to do this?

ps: I am aware that several JAX-WS libraries can validate the request/response when you call a webservice. But again, I am not calling any webservice; I have a simple SOAP message, and a WSDL, and I a need a function that validates the SOAP message against the WSDL.

ps: I am also aware that there tools that can do this, such as SOAPUI and XMLSpy. Again, I need to do this validation within my Java program.

ps: I am aware that I could extract the body part of the SOAP message, and validate it against the XSD. However, I'd like to validate the entire SOAP message against the WSDL.