Scala compile error: value is not member of - scala

Question

Sorry for my bad english!
I'm newbie in scala language, I'm compiling a project with some modifications and getting the error
"scala value is not member of"... some body can help me? follow my code:
Command.scala
package com.bla.cms.domain
import scala.collection.Map
import redis.clients.jedis.Jedis
sealed trait CommandResult
object Success extends CommandResult
object Failure extends CommandResult
object Unauthorized extends CommandResult
trait Command {
def captchaValidator:Validator
def logger:Logging
val properties = PropertiesHandler.readProperties(System.getProperty(PropertiesHandler.configFileNameKey))
}
RedisIcrementCommand.scala
package com.bla.cms
package domain
import scala.collection.Map
import redis.clients.jedis.JedisPool
import dispatch._
import org.apache.log4j.Logger
import redis.clients.jedis.Jedis
class RedisIncrementCommand(database: Jedis, val captchaValidator:Validator, val logger:Logging) extends Command {
def execute(parameters: Map[String,String]):CommandResult = {
captchaValidator.validate(parameters) match {
case Right(params) =>
executeInDatabase(params)
case Left(status) =>
logger.info("Falha ao tentar executar comando. Captcha inválido. Status: " + status)
Failure
}
}
def executeInDatabase(parameters: Map[String,String]):CommandResult = {
parameters.get("selectedAnswer") match {
case Some(selectedAnswer) =>
database.incr(selectedAnswer)
database.sadd(Answers.key, selectedAnswer)
logger.info("Incremento recebido com sucesso. Opção: " + selectedAnswer)
Success
case None =>
logger.info("Falha ao tentar computar incremento. Alternativa não informada.")
Failure
}
}
}
PollServle.scala
package com.bla.cms
import javax.servlet.http._
import redis.clients.jedis.JedisPool
import scala.collection.JavaConverters._
import scala.collection.JavaConversions._
import com.bla.cms.domain.Logging
import org.apache.log4j.Logger
import scala.util.matching.Regex
class PollServlet extends HttpServlet with RequiresConnection {
import com.bla.cms.domain._
import URLHandler._
override def doPost(request:HttpServletRequest, response:HttpServletResponse):Unit = {
val parametersMap = new ServletApiAdapter(request,response).parameters
val outcome = newIncrementCommand(request).execute(parametersMap)
redirect(request, response, outcome)
}
}
And when I compile, I've got:
[error]PollServlet.scala:19: value execute is nota member of com.bla.cms.domain.Command
val outcome = newIncrementCommand(request).execute(parametersMap)
Somebody can help me please?

Answer 1

You can:
Add def execute(parameters: Map[String,String]):CommandResult to Command trait.
Change newIncrementCommand(request) to return RedisIncrementCommand instead of Command.
Cast result of newIncrementCommand(request) to RedisIncrementCommand using asInstanceOf.
I prefer 1 which would be:
trait Command {
val captchaValidator: Validator
val logger: Logging
val properties = PropertiesHandler.readProperties(System.getProperty(PropertiesHandler.configFileNameKey))
def execute(parameters: Map[String,String]): CommandResult
def executeInDatabase(parameters: Map[String,String]): CommandResult
}