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https://issues.apache.org/jira/browse/BEAM-12384?focusedWorklogId=602353&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-602353
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ASF GitHub Bot logged work on BEAM-12384:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 26/May/21 13:59
Start Date: 26/May/21 13:59
Worklog Time Spent: 10m
Work Description: iemejia commented on pull request #14854:
URL: https://github.com/apache/beam/pull/14854#issuecomment-848793500
I cherry-picked @boyuanzz commit from the other PR notice however that I
could not get the Type to be preserved after the two DoFns are applied.
In `OutputSingleSource` I was able to export correctly the type by overriding
```java
@Override
public TypeDescriptor<SourceT> getOutputTypeDescriptor() {
return (TypeDescriptor<SourceT>)
new TypeDescriptor<Source<T>>(getClass()) {}.where(
new TypeParameter<T>() {},
source.getOutputCoder().getEncodedTypeDescriptor());
}
```
but in the second DoFn `BoundedSourceAsSDFWrapperFn`
I did not find a way to recover the real type of T when overwriting
`getOutputTypeDescriptor`. Any suggestion for this? Otherwise I suppose the
solution on Read is good enough.
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Issue Time Tracking
-------------------
Worklog Id: (was: 602353)
Time Spent: 2h 40m (was: 2.5h)
> Read.Bounded typeDescriptor is lost after move to SDF
> -----------------------------------------------------
>
> Key: BEAM-12384
> URL: https://issues.apache.org/jira/browse/BEAM-12384
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Ismaël Mejía
> Assignee: Ismaël Mejía
> Priority: P2
> Fix For: 2.31.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> While debugging a downstream transform after Read I notice that the
> typeDescriptor information was not set up correctly on the Read transform
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