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Posted to java-user@lucene.apache.org by spinergywmy <sp...@gmail.com> on 2006/11/20 12:31:33 UTC
how to search string with words
Hi,
I wonder how I can perform search on string of words within PDF file
contents, for instance,
I type "third party license" in the search text box, I'm using
QueryParser:
String searchString = request.getParameter("txtSearch");
QueryParser parser = new QueryParser("contents", analyzer);
Query query = parser.parse(searchString);
From the system.out.println(), I noticed that the query has been
broken like below:
contents:third contents:party contents:license
So, I m wondering how can I make the query becomes contents:third
party license? And make the searching more accurate.
Thanks.
regards,
Wooi Meng
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Re: how to search string with words
Posted by spinergywmy <sp...@gmail.com>.
Hi,
Thanks Martin. I have one question, what does that slop does within span
near query? What is the difference between 0 and 1? I have seen the source
from Lucene, one of the example putting slop as 4. Could u pls explain that
to me. Thanks.
regards,
Wooi Meng
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Re: how to search string with words
Posted by Martin Braun <mb...@uni-hd.de>.
spinergywmy schrieb:
> Hi Erick,
>
> I did take a look at the link that u provided me, and I have try myself
> but I have no return reesult.
>
> My search string is "third party license readme"
>
hhm with a quick look I would suggest that you have to split the string
into individual terms, and then make a spannearquery for these Terms:
String[] que_ary = system_query.split("\\s");
//=> Array with third,party,licens,readme
SpanQuery[] spanq_ar = new SpanQuery[que_ary.length];
for (int i=0; i < que_ary.length; i++) {
spanq_ar[i] = new SpanTermQuery( new Term("TI", que_ary[i]) );
}
// now we have an array of spantermquerys
// each term of the sentence should be in exact order => spannearquery
// I am not sure if you'll better do a slop of "0"
SpanFirstQuery sfq = new SpanFirstQuery(
new SpanNearQuery(spanq_ar,1,true), spanq_ar.length);
hth,
martin
> Below r the codes that I wrote, please point me out where I have done
> wrong.
>
> readerA = IndexReader.open(DsConstant.indexDir);
> readerB = IndexReader.open(DsConstant.idxCompDir);
>
> //building the searchables
> Searcher[] searchers = new Searcher[2];
>
> // VITAL STEP:adding the searcher for the empty index first, before
> the searcher for the populated index
> searchers[0] = new IndexSearcher(readerA);
> searchers[1] = new IndexSearcher(readerB);
>
> Analyzer analyzer = new StandardAnalyzer();
> QueryParser parser = new QueryParser(DsConstant.idxFileContent,
> analyzer);
>
> SpanTermQuery stq = new SpanTermQuery(new Term(field,
> buff.toString())); //field = search base on what I have index
> SpanFirstQuery sfq = new SpanFirstQuery(stq, searchString1.length);
> //searchString1 = "third party license readme"
>
> sfq = (SpanFirstQuery) sfq.rewrite(readerA);
> sfq = (SpanFirstQuery) sfq.rewrite(readerB);
>
> //creating the multiSearcher
> Searcher mSearcher = getMultiSearcherInstance(searchers);
>
> searchHits = mSearcher.search(sfq);
>
> The sysout as below:
>
> span first query is ::: spanFirst(TestC:TestC:Third Party License
> Readme, 32)
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Re: how to search string with words
Posted by spinergywmy <sp...@gmail.com>.
Hi Erick,
I did take a look at the link that u provided me, and I have try myself
but I have no return reesult.
My search string is "third party license readme"
Below r the codes that I wrote, please point me out where I have done
wrong.
readerA = IndexReader.open(DsConstant.indexDir);
readerB = IndexReader.open(DsConstant.idxCompDir);
//building the searchables
Searcher[] searchers = new Searcher[2];
// VITAL STEP:adding the searcher for the empty index first, before
the searcher for the populated index
searchers[0] = new IndexSearcher(readerA);
searchers[1] = new IndexSearcher(readerB);
Analyzer analyzer = new StandardAnalyzer();
QueryParser parser = new QueryParser(DsConstant.idxFileContent,
analyzer);
SpanTermQuery stq = new SpanTermQuery(new Term(field,
buff.toString())); //field = search base on what I have index
SpanFirstQuery sfq = new SpanFirstQuery(stq, searchString1.length);
//searchString1 = "third party license readme"
sfq = (SpanFirstQuery) sfq.rewrite(readerA);
sfq = (SpanFirstQuery) sfq.rewrite(readerB);
//creating the multiSearcher
Searcher mSearcher = getMultiSearcherInstance(searchers);
searchHits = mSearcher.search(sfq);
The sysout as below:
span first query is ::: spanFirst(TestC:TestC:Third Party License
Readme, 32)
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Re: how to search string with words
Posted by spinergywmy <sp...@gmail.com>.
Hi guys,
I have this problem searching all fields (metadata) using SpanFirstQuery.
My scenario is if I just searching on one thing using SpanFirstQuery
is not a problem. However, if I would have to search everything than I will
not have any result return.
For example, I search based on ALL (id, name, desc, owner, created
by), I put OR in between the query and it looks like id:1 OR name:first
thing OR desc:first thing OR owner:first thing OR createdBy:first thing.
When I sysout I saw the above query listed within my spanNear and that cause
no result. If I just searching on name:first thing then I don't have any
problem.
Is there any solution for my case?
Thanks.
regards,
Wooi Meng
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Re: how to search string with words
Posted by Erick Erickson <er...@gmail.com>.
>From a reply by Martin:
Please refer to the answers to my question on this list:
http://www.nabble.com/forum/ViewPost.jtp?post=7337585&framed=y
Shortly spoken: SpanFirstQuery works like a charm :)
hth,
On 11/20/06, spinergywmy <sp...@gmail.com> wrote:
>
>
> Hi,
>
> I wonder how I can perform search on string of words within PDF file
> contents, for instance,
>
> I type "third party license" in the search text box, I'm using
> QueryParser:
>
> String searchString = request.getParameter("txtSearch");
>
> QueryParser parser = new QueryParser("contents", analyzer);
>
> Query query = parser.parse(searchString);
>
> From the system.out.println(), I noticed that the query has been
> broken like below:
>
> contents:third contents:party contents:license
>
> So, I m wondering how can I make the query becomes contents:third
> party license? And make the searching more accurate.
>
> Thanks.
>
> regards,
> Wooi Meng
> --
> View this message in context:
> http://www.nabble.com/how-to-search-string-with-words-tf2668490.html#a7440978
> 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
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