[
https://issues.apache.org/jira/browse/LUCENE-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724945#action_12724945
]
Robert Muir commented on LUCENE-1581:
-------------------------------------
steven is right here, i should have said icu collation [in general] because the
specific task of key generation isnt that much faster.
http://site.icu-project.org/charts/collation-icu4j-sun
since its what is stored on disk its also useful to mention that the generated
sort keys are smaller than the jdk keys (see link above).
> LowerCaseFilter should be able to be configured to use a specific locale.
> -------------------------------------------------------------------------
>
> Key: LUCENE-1581
> URL: https://issues.apache.org/jira/browse/LUCENE-1581
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Digy
> Attachments: TestTurkishCollation.java
>
>
> //Since I am a .Net programmer, Sample codes will be in c# but I don't think
> that it would be a problem to understand them.
> //
> Assume an input text like "İ" and and analyzer like below
> {code}
> public class SomeAnalyzer : Analyzer
> {
> public override TokenStream TokenStream(string fieldName,
> System.IO.TextReader reader)
> {
> TokenStream t = new SomeTokenizer(reader);
> t = new Lucene.Net.Analysis.ASCIIFoldingFilter(t);
> t = new LowerCaseFilter(t);
> return t;
> }
>
> }
> {code}
>
> ASCIIFoldingFilter will return "I" and after, LowerCaseFilter will return
> "i" (if locale is "en-US")
> or
> "ı' if(locale is "tr-TR") (that means,this token should be input to
> another instance of ASCIIFoldingFilter)
> So, calling LowerCaseFilter before ASCIIFoldingFilter would be a solution,
> but a better approach can be adding
> a new constructor to LowerCaseFilter and forcing it to use a specific locale.
> {code}
> public sealed class LowerCaseFilter : TokenFilter
> {
> /* +++ */System.Globalization.CultureInfo CultureInfo =
> System.Globalization.CultureInfo.CurrentCulture;
> public LowerCaseFilter(TokenStream in) : base(in)
> {
> }
> /* +++ */ public LowerCaseFilter(TokenStream in,
> System.Globalization.CultureInfo CultureInfo) : base(in)
> /* +++ */ {
> /* +++ */ this.CultureInfo = CultureInfo;
> /* +++ */ }
>
> public override Token Next(Token result)
> {
> result = Input.Next(result);
> if (result != null)
> {
> char[] buffer = result.TermBuffer();
> int length = result.termLength;
> for (int i = 0; i < length; i++)
> /* +++ */ buffer[i] =
> System.Char.ToLower(buffer[i],CultureInfo);
> return result;
> }
> else
> return null;
> }
> }
> {code}
> DIGY
--
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-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-dev-h...@lucene.apache.org
