[LUCENE-3468] FirstPassGroupingCollector should use pollLast()

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0-ALPHA
• Fix Version/s: 4.0-ALPHA
• Component/s: modules/grouping
• Lucene Fields: New
• Assignee: Martijn van Groningen
• Reporter: Martijn van Groningen
• Created: 27/Sep/11 10:50
• Updated: 28/Aug/22 12:58
• Resolved: 28/Sep/11 18:41

Description

Currently FirstPassGroupingCollector uses last and remove method (TreeSet) for replacing a more relevant grouping during grouping.
This can be replaced by pollLast since Lucene trunk is now Java 6. TermFirstPassGroupingCollectorJava6 in Solr can be removed as well.