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Posted to dev@lucene.apache.org by Joe Tang <jo...@workmetro.com> on 2007/01/27 00:48:31 UTC
QueryParser Strips "++" out of my word "c++"
I am working on lucene 2.0.0 trying to parse a query with my word "c++" as a
keywords but unfortunately it strips out my word as "c".
How can I parse a query like "c++" and "c#"?
Here are the codes
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Query;
class QueryTest {
public static void main (String [ ] args){
String keywords = "java c++";
QueryParser qp = new QueryParser("keywords", new StandardAnalyzer());
try {
System.err.println("Query - "+qp.parse(keywords).toString());
}catch (ParseException pe){
System.err.println("Error Caught: "+pe);
}
}
}
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Re: QueryParser Strips "++" out of my word "c++"
Posted by Mike Klaas <mi...@gmail.com>.
On 1/26/07, Joe Tang <jo...@workmetro.com> wrote:
>
> Thanks for you reply Doron. It works partly on me.
>
> How should I customize the Analyzer so as to have the functionality of
> StandardAnalyzer as well as not stripping out some of the charactors?
Joe,
See nutch's version of StandardAnalyzer: it adds a few rules to
special case C++ and C#.
(nutch-trunk/src/java/org/apache/nutch/analysis/NutchAnalysis.jj).
You may be able to pluck those rules and insert them into Lucene's
StandardAnalyzer (after recompiling with javaCC).
-Mike
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Re: QueryParser Strips "++" out of my word "c++"
Posted by Joe Tang <jo...@workmetro.com>.
Thanks for you reply Doron. It works partly on me.
How should I customize the Analyzer so as to have the functionality of
StandardAnalyzer as well as not stripping out some of the charactors?
Regards,
Joe
Doron Cohen wrote:
>
> Hi Joe,
>
> It must be the standard analyzer's work - try like this:
> new QueryParser("keywords", new WhitespaceAnalyzer())
>
> Regards,
> Doron
>
> Joe Tang <jo...@workmetro.com> wrote on 26/01/2007 15:48:31:
>
>>
>> I am working on lucene 2.0.0 trying to parse a query with my word "c++"
> as a
>> keywords but unfortunately it strips out my word as "c".
>>
>> How can I parse a query like "c++" and "c#"?
>>
>> Here are the codes
>>
>> import org.apache.lucene.analysis.standard.StandardAnalyzer;
>> import org.apache.lucene.queryParser.ParseException;
>> import org.apache.lucene.queryParser.QueryParser;
>> import org.apache.lucene.search.Query;
>>
>> class QueryTest {
>> public static void main (String [ ] args){
>>
>> String keywords = "java c++";
>> QueryParser qp = new QueryParser("keywords", new
> StandardAnalyzer());
>> try {
>>
>> System.err.println("Query - "+qp.parse(keywords).toString());
>
>>
>> }catch (ParseException pe){
>> System.err.println("Error Caught: "+pe);
>> }
>> }
>>
>> }
>> --
>> View this message in context: http://www.nabble.com/QueryParser-
>> Strips-%22%2B%2B%22-out-of-my-word-%22c%2B%2B%22-tf3125890.html#a8660921
>> Sent from the Lucene - Java Developer mailing list archive at Nabble.com.
>>
>>
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>> To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-dev-help@lucene.apache.org
>>
>
>
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>
>
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Re: QueryParser Strips "++" out of my word "c++"
Posted by Doron Cohen <DO...@il.ibm.com>.
Hi Joe,
It must be the standard analyzer's work - try like this:
new QueryParser("keywords", new WhitespaceAnalyzer())
Regards,
Doron
Joe Tang <jo...@workmetro.com> wrote on 26/01/2007 15:48:31:
>
> I am working on lucene 2.0.0 trying to parse a query with my word "c++"
as a
> keywords but unfortunately it strips out my word as "c".
>
> How can I parse a query like "c++" and "c#"?
>
> Here are the codes
>
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.queryParser.ParseException;
> import org.apache.lucene.queryParser.QueryParser;
> import org.apache.lucene.search.Query;
>
> class QueryTest {
> public static void main (String [ ] args){
>
> String keywords = "java c++";
> QueryParser qp = new QueryParser("keywords", new
StandardAnalyzer());
> try {
>
> System.err.println("Query - "+qp.parse(keywords).toString());
>
> }catch (ParseException pe){
> System.err.println("Error Caught: "+pe);
> }
> }
>
> }
> --
> View this message in context: http://www.nabble.com/QueryParser-
> Strips-%22%2B%2B%22-out-of-my-word-%22c%2B%2B%22-tf3125890.html#a8660921
> Sent from the Lucene - Java Developer mailing list archive at Nabble.com.
>
>
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