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https://issues.apache.org/jira/browse/FLINK-9834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16555157#comment-16555157
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buptljy commented on FLINK-9834:
--------------------------------
It seems that we can use _*implicitly[TypeInformation[Array[Byte]]]*_ to do
that, although I don't think it's an appropriate way....
> Unable to support scala BasicArrayTypeInfo
> ------------------------------------------
>
> Key: FLINK-9834
> URL: https://issues.apache.org/jira/browse/FLINK-9834
> Project: Flink
> Issue Type: Bug
> Components: Type Serialization System
> Reporter: buptljy
> Assignee: buptljy
> Priority: Major
>
> BasicArrayTypeInfo does not supported scala type in some circumstances. For
> example,
> {code:scala}
> // we set a descriptor here and get value from it.
> val datas: mutable.Map[String, Array[Byte]] = mutable.Map()
> val descriptor = new MapStateDescriptor("realtime-state",
> BasicTypeInfo.STRING_TYPE_INFO, BasicArrayTypeInfo.BYTE_ARRAY_TYPE_INFO)
> val state = context.getKeyedStateStore.getMapState(descriptor)
> val iter = state.entries().iterator()
> while (iter.hasNext) {
> val entry = iter.next()
> datas.put(entry.getKey, entry.getValue)
> }
> {code}
> The codes above cannot be compiled successfully because the "state" is using
> java.lang.Byte but the "datas" is using scala.Byte, and we have to iterate
> all values of the Array like "datas.put(entry.getKey, entry.getValue.map(byte
> => byte.asInstanceOf[Byte]))", which is definitely not what we want.
> I suggest that we create a ScalaBasicArrayTypeInfo like the
> "BasicArrayTypeInfo" for scala.
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