LUCENE-9369: Deprecate ValueSourceGroupSelector #1513
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This commit deprecates grouping's ValueSourceGroupSelector, and moves
a copy of its code into Solr to preserve its group-by-fieldsource functionality.
AllGroupsCollectorTest and AllGroupHeadsCollectorTest are removed entirely,
as their test coverage is duplicated by BaseGroupSelectorTestCase; similarly,
TestGrouping and GroupingSearchTest are duplicated by both
BaseGroupSelectorTestCase and BlockGroupingTest. DistinctValuesCollectorTest
is reworked to depend only on TermGroupSelector.