optimisation for the GermanStemmer.vb
--------------------------------------
Key: LUCENENET-466
URL: https://issues.apache.org/jira/browse/LUCENENET-466
Project: Lucene.Net
Issue Type: Improvement
Components: Lucene.Net Contrib
Affects Versions: Lucene.Net 2.9.4, Lucene.Net 3.0.3, Lucene.Net 2.9.4g
Reporter: Prescott Nasser
Priority: Minor
Fix For: Lucene.Net 3.0.3
I have a little optimisation for the GermanStemmer.vb (in
Contrib.Analyzers) class. At the moment the function "Substitute"
converts the german "Umlaute" "ä" in "a", "ö" in"o" and "ü" in "u". This
is not the correct german translation. They must be converted to "ae",
"oe" and "ue". So I can write the name "Björn" or "Bjoern" but not
"Bjorn". With this optimization a user can search for "Björn" and also
find "Bjoern".
Here is the optimized code snippet:
else if ( buffer[c] == 'ä' )
{
buffer[c] = 'a';
buffer.Insert(c + 1, 'e');
}
else if ( buffer[c] == 'ö' )
{
buffer[c] = 'o';
buffer.Insert(c + 1,'e');
}
else if ( buffer[c] == 'ü' )
{
buffer[c] = 'u';
buffer.Insert(c + 1,'e');
}
Thank You
Björn
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