Hi,
Can you check the log output in your IDE or the log files of the Flink
client (./bin/flink). The TypeExtractor is logging why a POJO is not
recognized as a POJO.
The log statements look like this:
20:42:43,465 INFO org.apache.flink.api.java.typeutils.TypeExtractor
- class com.dataartisans.debug.MyPojo must have a default constructor
to be used as a POJO.
On Thu, Dec 10, 2015 at 11:24 PM, Abdulrahman kaitoua <
[email protected]> wrote:
>
>
> Hello,
>
> I would like to hive directions to make my code work again (thanks in
> advance). My code used to work on versions equal or less than 9.1 but when
> i included 10 or 10.1 i got the following exception.
>
> This type
> (ObjectArrayTypeInfo<GenericType<it.polimi.genomics.core.DataTypes.GValue>>)
> cannot be used as key
>
> I understood that it is related to the serialisation of objects. I tried
> to follow the POJO building directions in
> https://cwiki.apache.org/confluence/display/FLINK/Type+System,+Type+Extraction,+Serialization
> with no luck to make it work.
>
> my dataset contains a set of tuples as key and one array of GValues, this
> is a snapshot of the GValue class.
>
>
> sealed trait GValue extends Serializable with Ordered[GValue]{
> def compare(o : GValue) : Int = {
> o match {
> case GDouble(v) => this.asInstanceOf[GDouble].v compare v
> case GString(v) => this.asInstanceOf[GString].v compare v
> case GInt(v) => this.asInstanceOf[GInt].v compare v
> case GNull() => 0
> }
> }
> def equal(o : GValue) : Boolean = {
> o match {
> case GInt(value) => try{value.equals(o.asInstanceOf[GInt].v)} catch {
> case e : Throwable => false }
> case GDouble(value) => try{value.equals(o.asInstanceOf[GDouble].v)}
> catch { case e : Throwable => false }
> case GString(value) => try{value.equals(o.asInstanceOf[GString].v)}
> catch { case e : Throwable => false }
> case GNull() => o.isInstanceOf[GNull]
> case _ => false
> }
> }
> }
>
> /**
> * Represents a @GValue that contains an integer
> * @deprecated
> * @param v
> */
> case class GInt(v: Int) extends GValue{
> def this() = this(0)
> override def toString() : String = {
> v.toString
> }
> override def equals(other : Any) : Boolean = {
> other match {
> case GInt(value) => value.equals(v)
> case _ => false
> }
> }
> }
>
> /**
> * Represents a @GValue that contains a number as a @Double
> * @param v number
> */
> case class GDouble(v: Double) extends GValue {//with Ordered[GDouble]{
>
> def this() = this(0.0)
>
> override def equals(other : Any) : Boolean = {
> other match {
> case GDouble(value) => value.equals(v)
> case _ => false
> }
> }
> }
>
> /**
> * Represents a @GValue that contains a @String
> * @param v string
> */
> case class GString(v: String) extends GValue{
> def this() = this(".")
> override def toString() : String = {
> v.toString
> }
> override def equals(other : Any) : Boolean = {
> other match {
> case GString(value) => value.equals(v)
> case _ => false
> }
> }
> }
>
>
> Regards,
>
>
>
>
> *-----------------------------------------------------------------Abdulrahman
> Kaitoua-----------------------------------------------------------------Ph.D.
> Candidate at Politecnico Di Milano*
>
>
