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https://issues.apache.org/jira/browse/HBASE-28670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17855797#comment-17855797
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Istvan Toth commented on HBASE-28670:
-------------------------------------
something like
interface MaybeOffHeapCell, which adds a method isOffHeap()
So that wrapper Cells could return the value according to the wrapped Cell's
type.
> Marker interface for Cells which may have backing ByteBuffers
> -------------------------------------------------------------
>
> Key: HBASE-28670
> URL: https://issues.apache.org/jira/browse/HBASE-28670
> Project: HBase
> Issue Type: Improvement
> Reporter: Istvan Toth
> Priority: Major
>
> We often need to treat cells that may have backing ByteBuffers differently.
> The easy thing to would be checking if they are ByteBufferExtendedCell , but
> CellWrapper , OnHepDecodedCell and TagRewriteCell may also delegate to a
> ByteBufferExtendedCell.
> Having a marker interface that indicates that a cell is guaranteed to be
> on-heap, or that it may not be fully on-heap would make it easier and faster
> to check whether we need to clone them. (We only need one, it may be either
> negative or positive)
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