MappedSortComparator

Class Overview

This Sort Comparator uses a mixed strategy to retrieve the term values. If we are retrieving less than 1% of the documents in the index, we get each document value individually. Once passed the 1% threshold however we switch to reading through the terms dictionary in lucene, and builds up a list of ordered terms. It then sorts the documents according to the order that they appear in the terms list. This latter approach, whilst very fast, does load the entire term dictionary into memory, and allocates a slot for every document value, which is why we do not use it all the time.

We believe that most searches in very large JIRA installations will return a very small portion of the document index, either because they are over only one of many projects or they return only open issues, especially on dashboards and in GreenHopper and similar plugins as well as in general navigator searches.

Summary

[Expand] Inherited Methods
From class org.apache.lucene.search.FieldComparatorSource abstract FieldComparator newComparator(String arg0, int arg1, int arg2, boolean arg3)
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait(long arg0, int arg1) final void wait(long arg0) final void wait()