scala - Unable to access Seq elements and return entire Seq as Json -

so extremely new scala , seem doing horribly wrong simple logic. need query database websitetemplates. trying access first element of sequence (simply practice) keep getting classcastexception - [ljava.lang.object; cannot cast models.websitetemplate. next, want return entire seq obtained json. tried json.arr() won't work. searched none matches exact use case strangely. here relevant code -

websitecontroller

@singleton class websitetemplatecontroller @inject()(websitetemplatedao: websitetemplatedao, db: db) extends controller{    def index = action.async {     implicit request => db.withtransaction() {       implicit em => {         try {            val templates: seq[websitetemplate] = websitetemplatedao.findall()           val template = templates(0)            logger.info("the size " + template.name)           future(ok(json.obj(             "message" -> "success"           )))         } catch {            case e: exception =>             e.printstacktrace()             future(internalservererror(s"lag gaye"))         }       }     }   } } 

websitedaoimpl

@implementedby(classof[websitetemplatedaoimpl]) trait websitetemplatedao extends dao[websitetemplate]{   def findall()(implicit em: entitymanager): seq[websitetemplate] }  @singleton class websitetemplatedaoimpl @inject()(db: db) extends daoimpl(classof[websitetemplate]) websitetemplatedao{    override def findall()(implicit em: entitymanager): seq[websitetemplate] = {      val query = em.createquery(s"select idint, name websitetemplate")     db.executequery(query)   } } 

daoimpl

trait dao[t] {   def findbyid(id:string)(implicit em:entitymanager) : option[t]   def create : t }  class daoimpl[t](cls:class[t]) extends dao[t] {   def findbyid(id: string)(implicit em: entitymanager): option[t] = {     val query = em.createquery(s"select c ${cls.getname} c c.id=:id")     query.setparameter("id",id)     val list = query.getresultlist     if (list.nonempty) {       option(list(0).asinstanceof[t])     } else {       none     }   }    override def create: t = {     cls.newinstance()   } } 

websitetemplate

@entity @table(name = "templates") @entitylisteners(array(classof[setforeignkeyonsave])) class websitetemplate{    @id   @column(name = "id")   @beanproperty   var intid: java.lang.integer = _    /*@transient   override var id: string = _*/    @beanproperty   @column(name = "name")   var name: string = _ } 

a bit more explanation of problem. on getting type of templates(0) using getclass() method, shows [ljava.lang.object whereas expect of type websitetemplate.