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From manjula wijewickrema <manjul...@gmail.com>
Subject Re: Error of the code
Date Thu, 13 May 2010 12:16:36 GMT
Dear Ian,

Thanks a lot for your immediate reply. As you have mentioned I replaced the
lines as follows.


IndexReader ir=IndexReader.open(directory);

TermFreqVector vector=ir.getTermFreqVector(0,"fieldname");

Now the error has been vanished and thanks for it. But I can't still see the
results although I have moved those lines after iwriter.close(). What's the
reason for this?

sample code after modifications:
.........................
........................

String text = "This is the text to be indexed.";

 doc.add(*new* Field("fieldname", text, Field.Store.*YES*,Field.Index.*
ANALYZED*,Field.TermVector.*WITH_POSITIONS_OFFSETS*));

iwriter.addDocument(doc);

iwriter.close();

IndexReader ir=IndexReader.open(directory);

TermFreqVector vector=ir.getTermFreqVector(0,"fieldname");
*

int* size = vector.size();

*for* ( String term : vector.getTerms() )

System.*out*.println( "size = " + size );

IndexSearcher isearcher = *new* IndexSearcher(directory, *true*);
..........
..........
I appreciate your kind coperation
Manjula
On Thu, May 13, 2010 at 3:45 PM, Ian Lea <ian.lea@gmail.com> wrote:

> You need to replace this:
>
> TermFreqVector vector = IndexReader.getTermFreqVector(0, "fieldname" );
>
> with
>
> IndexReader ir = whatever(...);
> TermFreqVector vector = ir.getTermFreqVector(0, "fieldname" );
>
> And you'll need to move it to after the writer.close() call if you
> want it to see the doc you've just added.
>
>
>
> --
> Ian.
>
>
>
> On Thu, May 13, 2010 at 11:07 AM, manjula wijewickrema
> <manjula53@gmail.com> wrote:
> > Dear All,
> >
> > I am trying to get the term frequencies (through TermFreqVector) of a
> > document (using Lucene 2.9.1). In order to do that I have used the
> following
> > code. But there is a compile time error in the code and I can't figure it
> > out. Could somebody can guide me what's wrong with it.
> > Compile time error I got:
> > Cannot make a static reference to the non-static method
> > getTermFreqVector(int, String) from the type IndexReader.
> >
> > Code:
> >
> >  *import* org.apache.lucene.analysis.standard.StandardAnalyzer;
> >
> > *import* org.apache.lucene.document.Document;
> > *
> >
> > import* org.apache.lucene.document.Field;
> > *
> >
> > import* org.apache.lucene.index.IndexWriter;
> > *
> >
> > import* org.apache.lucene.queryParser.ParseException;
> > *
> >
> > import* org.apache.lucene.queryParser.QueryParser;
> > *
> >
> > import* org.apache.lucene.search.*;
> > *
> >
> > import* org.apache.lucene.store.Directory;
> > *
> >
> > import* org.apache.lucene.store.RAMDirectory;
> > *
> >
> > import* org.apache.lucene.util.Version;
> >
> > *
> >
> > import* org.apache.lucene.index.IndexReader;
> > *
> >
> > import* org.apache.lucene.index.TermEnum;
> > *
> >
> > import* org.apache.lucene.index.Term;
> > *
> >
> > import* org.apache.lucene.index.TermFreqVector;
> >
> > *
> >
> > import* java.io.IOException;
> > *
> >
> > public* *class* DemoTest {
> >
> > *public* *static* *void* main(String[] args) {
> >
> > StandardAnalyzer analyzer = *new*
> StandardAnalyzer(Version.*LUCENE_CURRENT*
> > );
> >
> > *try* {
> >
> > Directory directory = *new* RAMDirectory();
> >
> > IndexWriter iwriter = *new* IndexWriter(directory, analyzer,
> > *true*,*new*IndexWriter.MaxFieldLength(25000));
> >
> > Document doc = *new* Document();
> >
> > String text = "This is the text to be indexed.";
> >
> > doc.add(*new* Field("fieldname", text, Field.Store.*YES*,Field.Index.*
> > ANALYZED*,Field.TermVector.*WITH_POSITIONS_OFFSETS*));
> >
> > iwriter.addDocument(doc);
> >
> > TermFreqVector vector = IndexReader.getTermFreqVector(0, "fieldname" );
> > *
> >
> > int* size = vector.size();
> >
> > *for* ( String term : vector.getTerms() )
> >
> > System.*out*.println( "size = " + size );
> >
> > iwriter.close();
> >
> > IndexSearcher isearcher = *new* IndexSearcher(directory, *true*);
> >
> > QueryParser parser = *new* QueryParser(Version.*LUCENE_CURRENT*,
> "fieldname",
> > analyzer);
> >
> > Query query = parser.parse("text");
> >
> > ScoreDoc[] hits = isearcher.search(query, *null*, 1000).scoreDocs;
> >
> > System.*out*.println("hits.length(1) = " + hits.length);
> >
> > // Iterate through the results:
> >
> > *for* (*int* i = 0; i < hits.length; i++) {
> >
> > Document hitDoc = isearcher.doc(hits.doc);
> >
> > System.*out*.println("hitDoc.get(\"fieldname\") (This is the text to be
> > indexed) = " +
> >
> > hitDoc.get("fieldname"));
> >
> > }
> >
> > isearcher.close();
> >
> > directory.close();
> >
> > } *catch* (Exception ex) {
> >
> > ex.printStackTrace();
> >
> > }
> >
> > }
> >
> > }
> >
> >
> >
> > Thanks in advance
> >
> > Manjula
> >
>
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