I open a IndexReader. I want to see how many docs are indexed, to get this count I used
objReader.maxDoc() ... its returning me 0. How can I get the total no. of docs in index? On 24 December 2010 16:36, Jawahar Lal <j...@chambal.com> wrote: > Thanks Umesh > > I want to know more about Filters, how to use that using lucene 3.0.3 > > Can I get links to learn how/when to use filters. > > jawahar > > > On 24 December 2010 16:25, Umesh Prasad <umesh.i...@gmail.com> wrote: > >> Yes. >> >> Also note that , topdocs.totalhits will always give u total number of >> hits, >> regardless of the number of score doc u choose to retrieve. >> topdocs.scoredocs will have min(totalhits, ndocs) docs populated. >> >> >> On Fri, Dec 24, 2010 at 2:48 PM, Jawahar Lal <j...@chambal.com> wrote: >> >> > ok, I understand. >> > >> > It means, that we have to fetch total no. of docs i.e. >> > >> > Suppose we need to show 100 docs per page >> > >> > Page No. NDocs No. of documents to be shown on Page >> > 1 100 0-99 >> > 2 200 100-199 >> > 3 300 200-299 & so on... >> > >> > >> > >> > >> > >> > On 24 December 2010 12:35, Umesh Prasad <umesh.i...@gmail.com> wrote: >> > >> > > Hi Jawahar, >> > > http://search-lucene.com/m/duTpc14AmzV >> > > See Uwe's reply. >> > > >> > > >> > > >> > > Regards >> > > Umesh >> > > >> > > PS: I would use search-lucene.com to 1st check if a solution is >> posted >> > > already. It is really good. >> > > >> > > ------------------------ >> > > QUOTED UWE's reply >> > > ---------------------- >> > > >> > > To get the second page, >> > > Take: >> > > int hitsPerPage = 10; >> > > int pageOffset = 10; >> > > TopDocCollector collector = new TopDocCollector(hitsPerPage + >> > pageOffset); >> > > >> > > For page third page take int pageOffset = 20; and so on >> > > >> > > After that your results are in hits[], for the first page in [0] to >> [9], >> > > the >> > > second page in [10] to [19] and so on: >> > > >> > > To display use something like: >> > > For (int i=pageOffset; Math.min(hitsPerPage + pageOffset, >> > > collector.topDocs().totalhits); i++) >> > > >> > > In general, you cannot retrieve a range directly, you can only >> retrieve >> > the >> > > top docs. As most people will not go beyond say page 10 when >> searching, >> > you >> > > have no memory problem, as scoreDocs will contain at most 100 doc ids. >> > > >> > > --------------- >> > > ------------------- >> > > >> > > >> > > On Fri, Dec 24, 2010 at 10:40 AM, Jawahar Lal <j...@chambal.com> >> wrote: >> > > >> > > > Hi, >> > > > >> > > > I search for an query. Total searched records are 5000. I only >> shows >> > 100 >> > > > records on one page. So I passed 100 as nDocs. >> > > > >> > > > I write the code in this way. >> > > > >> > > > IndexSearcher searcher = new >> > IndexSearcher(FSDirectory.open(new >> > > > File(path))); >> > > > >> > > > Query query = new QueryParser(Version.LUCENE_30, >> "field1", >> > new >> > > > StandardAnalyzer(Version.LUCENE_30)).parse("query"); >> > > > Query query1 = new QueryParser(Version.LUCENE_30, >> "field2", >> > > new >> > > > StandardAnalyzer(Version.LUCENE_30)).parse("query2"); >> > > > BooleanQuery lucBoolQueryOTHER = new BooleanQuery(); >> > > > lucBoolQueryOTHER.add(query, Occur.MUST); >> > > > lucBoolQueryOTHER.add(query1, Occur.MUST); >> > > > >> > > > TopDocs hits=searcher.search(query, null, 100); >> > > > >> > > > System.err.println("Total searched " + hits.totalHits); >> >> >> > > > 5000 >> > > > System.err.println("Total docs " + >> hits.scoreDocs.length); >> > >> >> > > > 100 >> > > > >> > > > // The code to print 100 records on first page >> > > > for(int i=0;i<hits.scoreDocs.length;i++){ >> > > > >> > > > >> > > > >> > > >> > >> System.out.println(searcher.doc(hits.scoreDocs[i].doc).getField("filename")); >> > > > } >> > > > >> > > > it worked fine. >> > > > >> > > > // Now I want to show all next search documents on Second >> Pages...when >> > I >> > > > tried in this way, I got the error. >> > > > for(int i=100;i<hits.totalHits;i++){ >> > > > >> > > > >> > > > >> > > >> > >> System.out.println(searcher.doc(hits.scoreDocs[i].doc).getField("filename")); >> > > > } >> > > > >> > > > searcher.close(); >> > > > >> > > > java.lang.ArrayIndexOutOfBoundsException: 100 >> > > > at Test.searchIndex(Test.java:96) >> > > > at Test.main(Test.java:54) >> > > > >> > > > Would need to perform searching again with different parameters to >> > fetch >> > > > next bunch of records ? >> > > > >> > > > >> > > > >> > > > >> > > > Thanks >> > > > >> > > >> > > >> > > >> > > -- >> > > --- >> > > Thanks & Regards >> > > Umesh Prasad >> > > >> > >> >> >> >> -- >> --- >> Thanks & Regards >> Umesh Prasad >> > >
