John Sandiford created FLINK-1378:
-------------------------------------
Summary: could not find implicit value for evidence parameter of
type TypeInformation
Key: FLINK-1378
URL: https://issues.apache.org/jira/browse/FLINK-1378
Project: Flink
Issue Type: Bug
Components: Scala API
Affects Versions: 0.7.0-incubating
Reporter: John Sandiford
This is an example of one of many cases that I cannot get to compile with the
scala API. I have tried using T : TypeInformation and : ClassTag but still
cannot get it to work.
//libraryDependencies += "org.apache.flink" % "flink-scala" % "0.7.0-incubating"
//
//libraryDependencies += "org.apache.flink" % "flink-clients" %
"0.7.0-incubating"
import org.apache.flink.api.scala._
import scala.util.{Success, Try}
object Main extends App {
val env = ExecutionEnvironment.getExecutionEnvironment
val data: DataSet[Double] = env.fromElements(1.0, 2.0, 3.0, 4.0)
def f[T](data: DataSet[T]): DataSet[(T, Try[Seq[Double]])] = {
data.mapPartition((iterator: Iterator[T]) => {
val first = iterator.next()
val second = iterator.next()
Iterator((first, Success(Seq(2.0, 3.0))), (second, Success(Seq(3.0,
1.0))))
})
}
val g = f(data)
g.print()
env.execute("Flink Test")
}
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