How to handle exceptions for XML validation on SwitchYard

Issue

• I configured @OperationTypes to validate the XML content and want to control the next route with the validation result.
• If the XML is valid, I want to access an external web service with the XML content, otherwise I want to create a result file (XML) in a folder.

• I saw something like this in the quickstarts but do not know how I can control and react in case the XML is not valid.

  @OperationTypes(in = "{urn:switchyard-quickstart:validate-xml:0.1.0}order", fault = "org.switchyard.quickstarts.camel.binding.InputXmlException")
  void greet(String inputXml);
  

• I created a class named InputXmlException but am not sure what this class should do and what it should implement/extend.