Move TrieRange to core
----------------------
Key: LUCENE-1673
URL: https://issues.apache.org/jira/browse/LUCENE-1673
Project: Lucene - Java
Issue Type: New Feature
Components: Search
Affects Versions: 2.9
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Fix For: 2.9
TrieRange was iterated many times and seems stable now (LUCENE-1470,
LUCENE-1582, LUCENE-1602). There is lots of user interest, Solr added it to its
default FieldTypes (SOLR-940) and if possible I want to move it to core before
release of 2.9.
Before this can be done, there are some things to think about:
# There are now classes called LongTrieRangeQuery, IntTrieRangeQuery, how
should they be called in core? I would suggest to leave it as it is. On the
other hand, if this keeps our only numeric query implementation, we could call
it LongRangeQuery, IntRangeQuery or NumericRangeQuery (see below, here are
problems). Same for the TokenStreams and Filters.
# Maybe the pairs of classes for indexing and searching should be moved into
one class: NumericTokenStream, NumericRangeQuery, NumericRangeFilter. The
problem here: ctors must be able to pass int, long, double, float as range
parameters. For the end user, mixing these 4 types in one class is hard to
handle. If somebody forgets to add a L to a long, it suddenly instantiates a
int version of range query, hitting no results and so on. Same with other
types. Maybe accept java.lang.Number as parameter (because nullable for
half-open bounds) and one enum for the type.
# TrieUtils move into o.a.l.util? or document or?
# Move TokenStreams into o.a.l.analysis, ShiftAttribute into
o.a.l.analysis.tokenattributes? Somewhere else?
# If we rename the classes, should Solr stay with Trie (because there are
different impls)?
# Maybe add a subclass of AbstractField, that automatically creates these
TokenStreams and omits norms/tf per default for easier addition to Document
instances?
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