[jira] [Created] (LUCENE-5110) DefaultICUTokenizerConfig should use the default ICU behavior for the Khmer script

["George Rhoten (JIRA)" <ji...@apache.org>]

George Rhoten created LUCENE-5110:
-------------------------------------

             Summary: DefaultICUTokenizerConfig should use the default ICU behavior for the Khmer script
                 Key: LUCENE-5110
                 URL: https://issues.apache.org/jira/browse/LUCENE-5110
             Project: Lucene - Core
          Issue Type: Bug
          Components: modules/other
    Affects Versions: 4.0
            Reporter: George Rhoten


Recent versions of ICU have their own implementation for the tokenization of the Khmer script. Lucene should not be overriding ICU's behavior any more.

I haven't tried the patch out, but the patch should look something like the following:

$ diff DefaultICUTokenizerConfig.java.orig DefaultICUTokenizerConfig.java
67,68d66
<   private static final BreakIterator thaiBreakIterator = 
<     BreakIterator.getWordInstance(new ULocale("th_TH"));
71,72d68
<   private static final BreakIterator khmerBreakIterator = 
<     readBreakIterator("Khmer.brk");
87d82
<       case UScript.THAI: return (BreakIterator)thaiBreakIterator.clone();
89d83
<       case UScript.KHMER: return (BreakIterator)khmerBreakIterator.clone();

and the Khmer.* files should be removed. ICU already does script specific tokenization these days. So the Thai one should not be needed either since ICU 50.

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