Dawid Weiss created LUCENE-7706:
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Summary: Make MergeScheduler.clone() abstract or drop it entirely?
Key: LUCENE-7706
URL: https://issues.apache.org/jira/browse/LUCENE-7706
Project: Lucene - Core
Issue Type: Task
Reporter: Dawid Weiss
Assignee: Dawid Weiss
Priority: Trivial
Fix For: master (7.0)
I didn't look too closely, but MergeScheduler has this piece of documentation:
{code}
* <p>Implementers of sub-classes should make sure that {@link #clone()}
* returns an independent instance able to work with any {@link IndexWriter}
* instance.</p>
{code}
Now, we don't seem to be using this at all... I think. MergeScheduler doesn't
even implement Cloneable. But in any case, I think it'd be better to provide an
abstract covariant of this sort:
{code}
public abstract MergeScheduler clone() {
return this;
}
{code}
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