lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Steven Rowe (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1434) IndexableBinaryStringTools: convert arbitrary byte sequences into Strings that can be used as index terms, and vice versa
Date Sat, 01 Nov 2008 04:49:44 GMT
IndexableBinaryStringTools: convert arbitrary byte sequences into Strings that can be used
as index terms, and vice versa
-------------------------------------------------------------------------------------------------------------------------

                 Key: LUCENE-1434
                 URL: https://issues.apache.org/jira/browse/LUCENE-1434
             Project: Lucene - Java
          Issue Type: New Feature
          Components: Other
    Affects Versions: 2.4
            Reporter: Steven Rowe
            Priority: Minor
             Fix For: 2.9


Provides support for converting byte sequences to Strings that can be used as index terms,
and back again. The resulting Strings preserve the original byte sequences' sort order (assuming
the bytes are interpreted as unsigned).

The Strings are constructed using a Base 8000h encoding of the original binary data - each
char of an encoded String represents a 15-bit chunk from the byte sequence.  Base 8000h was
chosen because it allows for all lower 15 bits of char to be used without restriction; the
surrogate range [U+D800-U+DFFF] does not represent valid chars, and would require complicated
handling to avoid them and allow use of char's high bit.

This class is intended to serve as a mechanism to allow CollationKeys to serve as index terms.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message