Unable to access Seq elements and return entire Seq as Json

So I am extremely new to Scala and seem to be doing something horribly wrong for a simple logic. I need to query database to get all the WebsiteTemplates. I am then trying to access the first element of the sequence (simply for practice) but keep getting the ClassCastException - [Ljava.lang.Object; cannot be cast to models.WebsiteTemplate. Next, I would want to return the entire Seq obtained as Json. Tried Json.arr() but won't work. Searched but none matches the exact use case strangely. Here is relevant the 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 is " + 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]) with WebsiteTemplateDAO{    override def findAll()(implicit em: EntityManager): Seq[WebsiteTemplate] = {      val query = em.createQuery(s"SELECT idint, name FROM 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 from ${cls.getName} as c where 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 my problem. On getting the type of templates(0) using getClass() method, it shows as [Ljava.lang.Object whereas I expect it to be of type WebsiteTemplate.

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