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Posted to java-user@lucene.apache.org by "naveen.quill" <na...@gmail.com> on 2008/11/21 06:57:12 UTC
how to sort the result by ignoring case in lucene
Hi,
I have a query regarding the sorting techniques in the lucene i.e
if i apply the sort method to the search results, lucene is sorting the
results by, without ignoring case, so, how to apply the sort technique that
it should sort by ignoring case
i.e :
if the results value are : {ACB, abc, adc, Aad},
After sorting the results by lucene : {Aad, ACB, abc, adc} [here the lucene
is taking uppercase words first to sort the results then lowercase],
but i need to get the results in this order : {Aad, abc, ACB, adc}
so how to sort the results by ignoring case
here is my code :
String queryComplex = "110_a_t:a* 110_a_t:A*";
SortField sortField = new SortField("110_a_t", SortField.STRING);
Sort sort = new Sort(sortField);
QueryParser queryParser=new QueryParser("",new StandardAnalyzer());
queryParser.setLowercaseExpandedTerms(false);
Query query = queryParser.parse(queryComplex);
org.apache.lucene.search.Hits
catalogueHits=search.indexSearcher.search(query, sort);
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Re: how to sort the result by ignoring case in lucene
Posted by "naveen.a" <na...@gmail.com>.
Hi Ganesh,
I have already tried my own comparator, below is my code :
SortComparator comparator = new SortComparator() {
@Override
protected Comparable getComparable(String arg0) {
final String str = arg0;
Comparable comparable = new Comparable() {
@Override
public int compareTo(Object o) {
System.out.println("obj = "+o.getClass()+",
str = "+str);
return
o.toString().compareToIgnoreCase(str);
}
};
return comparable;
}
};
SortField sortField = new SortField("110_a_t", comparator);
Sort sort = new Sort(sortField);
org.apache.lucene.search.Hits
catalogueHits=search.indexSearcher.search(query, sort);
-------------------------------------------------
here the lucene is passing the present class
(org.verus.ngl.lucene.search.NGLSearch$1$1) object to compareTo method, but
it is not a term to compare with anather term
so, how to implement the SortComparator, where should i change the code for
my comparator
Output :
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = Adalf Hitler
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = Adalf Hitler
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = agdfgdgdfg
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = agdfgdgdfg
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = afhuhruhgjr
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = afhuhruhgjr
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = afsfdsgsd
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = afsfdsgsd
obj = class org.verus.ngl.lucene.search.NGLSearch$1$1, str = adsadsd
Results are :
id = 134, docId = 105
id = 135, docId = 106
id = 102, docId = 73
id = 100, docId = 71
id = 101, docId = 72
id = 122, docId = 93
id = 127, docId = 98
id = 132, docId = 103
id = 143, docId = 114
Ganesh - yahoo wrote:
>
> You need to write your own sort comparator
> SortField(String field, SortComparatorSource comparator)
>
> Regards
> Ganesh
>
> ----- Original Message -----
> From: "naveen.quill" <na...@gmail.com>
> To: <ja...@lucene.apache.org>
> Sent: Friday, November 21, 2008 11:27 AM
> Subject: how to sort the result by ignoring case in lucene
>
>
>>
>> Hi,
>>
>> I have a query regarding the sorting techniques in the lucene i.e
>> if i apply the sort method to the search results, lucene is sorting the
>> results by, without ignoring case, so, how to apply the sort technique
>> that
>> it should sort by ignoring case
>>
>> i.e :
>> if the results value are : {ACB, abc, adc, Aad},
>> After sorting the results by lucene : {Aad, ACB, abc, adc} [here the
>> lucene
>> is taking uppercase words first to sort the results then lowercase],
>> but i need to get the results in this order : {Aad, abc, ACB, adc}
>>
>> so how to sort the results by ignoring case
>>
>> here is my code :
>> String queryComplex = "110_a_t:a* 110_a_t:A*";
>> SortField sortField = new SortField("110_a_t", SortField.STRING);
>> Sort sort = new Sort(sortField);
>> QueryParser queryParser=new QueryParser("",new StandardAnalyzer());
>> queryParser.setLowercaseExpandedTerms(false);
>> Query query = queryParser.parse(queryComplex);
>> org.apache.lucene.search.Hits
>> catalogueHits=search.indexSearcher.search(query, sort);
>> --
>> View this message in context:
>> http://www.nabble.com/how-to-sort-the-result-by-ignoring-case-in-lucene-tp20615647p20615647.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
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>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>
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>
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>
>
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Re: how to sort the result by ignoring case in lucene
Posted by Chris Hostetter <ho...@fucit.org>.
: You need to write your own sort comparator
: SortField(String field, SortComparatorSource comparator)
A much simpler approach is to index a lowercase version of the field.
since fields used for sorting are typically copies of other existing
fields anyway because they can't be tokenized, there's not much additional
overhead.
-Hoss
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Re: how to sort the result by ignoring case in lucene
Posted by Ganesh <em...@yahoo.co.in>.
You need to write your own sort comparator
SortField(String field, SortComparatorSource comparator)
Regards
Ganesh
----- Original Message -----
From: "naveen.quill" <na...@gmail.com>
To: <ja...@lucene.apache.org>
Sent: Friday, November 21, 2008 11:27 AM
Subject: how to sort the result by ignoring case in lucene
>
> Hi,
>
> I have a query regarding the sorting techniques in the lucene i.e
> if i apply the sort method to the search results, lucene is sorting the
> results by, without ignoring case, so, how to apply the sort technique
> that
> it should sort by ignoring case
>
> i.e :
> if the results value are : {ACB, abc, adc, Aad},
> After sorting the results by lucene : {Aad, ACB, abc, adc} [here the
> lucene
> is taking uppercase words first to sort the results then lowercase],
> but i need to get the results in this order : {Aad, abc, ACB, adc}
>
> so how to sort the results by ignoring case
>
> here is my code :
> String queryComplex = "110_a_t:a* 110_a_t:A*";
> SortField sortField = new SortField("110_a_t", SortField.STRING);
> Sort sort = new Sort(sortField);
> QueryParser queryParser=new QueryParser("",new StandardAnalyzer());
> queryParser.setLowercaseExpandedTerms(false);
> Query query = queryParser.parse(queryComplex);
> org.apache.lucene.search.Hits
> catalogueHits=search.indexSearcher.search(query, sort);
> --
> View this message in context:
> http://www.nabble.com/how-to-sort-the-result-by-ignoring-case-in-lucene-tp20615647p20615647.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
Send instant messages to your online friends http://in.messenger.yahoo.com
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