David Smiley created SOLR-14256:
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Summary: Remove HashDocSet
Key: SOLR-14256
URL: https://issues.apache.org/jira/browse/SOLR-14256
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: search
Reporter: David Smiley
This particular DocSet is only used in places where we need to convert
SortedIntDocSet in particular to a DocSet that is fast for random access. Once
such a conversion happens, it's only used to test some docs for presence and it
could be another interface. DocSet has kind of a large-ish API surface area to
implement. Since we only need to test docs, we could use Bits interface
(having only 2 methods) backed by an off-the-shelf primitive long hash set on
our classpath. Perhaps a new method on DocSet: getBits() or
DocSetUtil.getBits(DocSet).
In addition to removing complexity unto itself, this improvement is required by
SOLR-14185 because it wants to be able to produce a DocIdSetIterator slice
directly from the DocSet but HashDocSet can't do that without sorting first.
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