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
