We have the same needs in our music search, and we found this is not a
good approach for performance reason .
Did any one have experience of implement the autosuggestion in a heavy
product environment ?
Any suggestions ?
2009/11/26 Anshum <ansh...@gmail.com>:
> Try this,
> Change the code as required:
> ---------
>
>
> import java.io.IOException;
>
> import org.apache.lucene.index.CorruptIndexException;
> import org.apache.lucene.index.IndexReader;
> import org.apache.lucene.index.Term;
> import org.apache.lucene.index.TermEnum;
>
> /**
> * @author anshum
> *
> */
> public class GetTermsToSuggest {
>
> private static void getTerms(String inputText) {
> IndexReader reader = null;
> try {
> reader = IndexReader.open("/home/anshum/index/testindex");
> String field = "fieldname";
> field = field.intern();
> TermEnum tenum = reader.terms(new Term("fieldname", ""));
> Boolean hasRun = false;
> try {
> do {
> final Term term = tenum.term();
> if (term == null || term.field() != field)
> break;
> final String termText = term.text();
> if (termText.startsWith(inputText)) {
> System.out.println(termText);
> hasRun = true;
> } else if (hasRun == true)
> break;
> } while (tenum.next());
> tenum.close();
> } catch (IOException e) {
> e.printStackTrace();
> }
> } catch (CorruptIndexException e2) {
> e2.printStackTrace();
> } catch (IOException e2) {
> e2.printStackTrace();
> }
>
> }
>
> /**
> * @param args
> */
> public static void main(String[] args) {
> GetTermsToSuggest.getTerms(args[0]);
> }
> }
>
>
> --
> Anshum Gupta
> Naukri Labs!
> http://ai-cafe.blogspot.com
>
> The facts expressed here belong to everybody, the opinions to me. The
> distinction is yours to draw............
>
>
> On Thu, Nov 26, 2009 at 3:19 PM, Uwe Schindler <u...@thetaphi.de> wrote:
>
>> You can fix this if you just create the initial term not with "", instead
>> with your prefix:
>> TermEnum tenum = reader.terms(new Term(field,prefix));
>>
>> And inside the while loop just break out,
>>
>> if (!termText.startsWith(prefix)) break;
>>
>> -----
>> Uwe Schindler
>> H.-H.-Meier-Allee 63, D-28213 Bremen
>> http://www.thetaphi.de
>> eMail: u...@thetaphi.de
>>
>>
>> > -----Original Message-----
>> > From: DHIVYA M [mailto:dhivyakrishna...@yahoo.com]
>> > Sent: Thursday, November 26, 2009 10:39 AM
>> > To: java-user@lucene.apache.org
>> > Subject: RE: Need help regarding implementation of autosuggest using
>> > jquery
>> >
>> > Sir,
>> >
>> > Your suggestion was fantastic.
>> >
>> > I tried the below mentioned code but it is showing me the entire result
>> of
>> > indexed words starting from the letter that i give as input.
>> > Ex:
>> > if i give "fo"
>> > am getting all the indexes from the word starting with fo upto words
>> > starting with z.
>> > i.e. it starts displaying from the word matching the search word and ends
>> > up with the last word available in the index file.
>> >
>> > Kindly suggest me a solution for this problem
>> >
>> > Thanks in advance,
>> > Dhivya
>> >
>> > --- On Wed, 25/11/09, Uwe Schindler <u...@thetaphi.de> wrote:
>> >
>> >
>> > From: Uwe Schindler <u...@thetaphi.de>
>> > Subject: RE: Need help regarding implementation of autosuggest using
>> > jquery
>> > To: java-user@lucene.apache.org
>> > Date: Wednesday, 25 November, 2009, 9:54 AM
>> >
>> >
>> > Hi Dhivya,
>> >
>> > you can iterate all terms in the index using a TermEnum, that can be
>> > retrieved using IndexReader.terms(Term startTerm).
>> >
>> > If you are interested in all terms from a specific field, position the
>> > TermEnum on the first possible term in this field ("") and iterate until
>> > the
>> > field name changes. As terms in the TermEnum are first ordered by field
>> > name
>> > then by term text (in UTF-16 order), the loop would look like this:
>> >
>> > IndexReader reader = ...
>> > String field = ....
>> > Field = field.intern(); // important for the while loop
>> > TermEnum tenum = reader.terms(new Term(field,""));
>> > try {
>> > do {
>> > final Term term = tenum.term();
>> > if (term==null || term.field()!=field) break;
>> > final String termText = term.text();
>> > // do something with the termText
>> > } while (tenum.next());
>> > } finally {
>> > tenum.close();
>> > }
>> >
>> >
>> > -----
>> > Uwe Schindler
>> > H.-H.-Meier-Allee 63, D-28213 Bremen
>> > http://www.thetaphi.de
>> > eMail: u...@thetaphi.de
>> >
>> >
>> > > -----Original Message-----
>> > > From: DHIVYA M [mailto:dhivyakrishna...@yahoo.com]
>> > > Sent: Wednesday, November 25, 2009 8:06 AM
>> > > To: java user
>> > > Subject: Need help regarding implementation of autosuggest using jquery
>> > >
>> > > Hi all,
>> > >
>> > > Am using lucene 2.3.2 as a search engine in my e-paper site. So that i
>> > > want the user to search the news. I achieved that objective but now am
>> > > trying to implement autosuggest so that user can pick a choice from the
>> > > drop down and no need of typing in the entire sentence or so.
>> > >
>> > > I have download Jquery for this purpose and am trying to implement it.
>> > > The collections of data to refer for the suggestion is given in an
>> > > arraylist or jus with in a string.
>> > >
>> > > But for my application, i need to populate the suggestions with the
>> > > indexed words available in the index file created during indexing
>> > > operation.
>> > >
>> > > Can anyone give an idea to read the contents from the index file and
>> > make
>> > > it available as suggestions? or anyother idea to achieve this
>> objective?
>> > >
>> > > Thanks in advance,
>> > > Dhivya
>> > >
>> > >
>> > > The INTERNET now has a personality. YOURS! See your Yahoo!
>> > Homepage.
>> > > http://in.yahoo.com/
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
>> > For additional commands, e-mail: java-user-h...@lucene.apache.org
>> >
>> >
>> >
>> >
>> > The INTERNET now has a personality. YOURS! See your Yahoo!
>> Homepage.
>> > http://in.yahoo.com/
>>
>>
>> ---------------------------------------------------------------------
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>>
>>
>
--
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