:: DeveloperApi :: Serializer for Java query classes using Gson
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      :: DeveloperApi :: Serializer for Scala query classes using org.apache.predictionio.controller.Utils.json4sDefaultFormats
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
:: DeveloperApi :: Base trait with default custom query serializer, exposed to engine developer via org.apache.predictionio.controller.CustomQuerySerializer