[
http://issues.apache.org/jira/browse/LUCENE-527?page=comments#action_12371055 ]
Håkon T. Bommen commented on LUCENE-527:
----------------------------------------
My mistake then.
Thanks for the help, and sorry about raising bells unnessessary.
Changed the code to :
for (int j=0; j<terms.length; j++){
TermDocs td = reader.termDocs( new Term("contents", terms[j]) );
if (td.skipTo(docID) && td.doc() == docID) {
System.out.println( "Term '" + terms[j] + "' occures " +
td.freq() + " time(s) in document nr. " + docID );
}
else {
System.out.println( "Term '" + terms[j] + "' occures " +
0 + " time(s) in document nr. " + docID );
}
}
> Bug in the TermDocs.freq() method?
> -----------------------------------
>
> Key: LUCENE-527
> URL: http://issues.apache.org/jira/browse/LUCENE-527
> Project: Lucene - Java
> Type: Bug
> Versions: 1.9
> Environment: Scientific linux
> Reporter: Håkon T. Bommen
>
> I belive I get incorrect data from the TermDocs.freq() method. The attached
> code demonstrate this. Document one has correct term count. In document zero
> and two, the term "stored" and "indexed" is reported to occure once in both
> documents. This is incorrect.
> // LuceneTest.java
> import org.apache.lucene.analysis.Analyzer;
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.queryParser.ParseException;
> import org.apache.lucene.document.*;
> import org.apache.lucene.index.*;
> import org.apache.lucene.search.*;
> import org.apache.lucene.queryParser.QueryParser;
> import org.apache.lucene.store.RAMDirectory;
> import org.apache.lucene.store.Directory;
> public class LuceneTest{
> public LuceneTest(){}
> public static void main(String[] args){
> IndexWriter writer;
> IndexReader reader;
> Searcher searcher;
> Document doc;
> Directory dir = new RAMDirectory();
> try{
> // create index
> writer = new IndexWriter( dir , new StandardAnalyzer(),
> true);
> doc = new Document();
> doc.add( new Field( "title", "Doc 0", Field.Store.YES,
> Field.Index.TOKENIZED ) );
> doc.add( new Field( "contents", "Text Text and more
> Text", Field.Store.NO, Field.Index.TOKENIZED ) );
> writer.addDocument(doc);
> doc = new Document();
> doc.add( new Field( "title", "Doc 1", Field.Store.YES,
> Field.Index.TOKENIZED ) );
> doc.add( new Field( "contents", "This text is not
> stored, only indexed.", Field.Store.NO, Field.Index.TOKENIZED ) );
> writer.addDocument(doc);
> doc = new Document();
> doc.add( new Field( "title", "Doc 2", Field.Store.YES,
> Field.Index.TOKENIZED ) );
> doc.add( new Field( "contents", "Text Text Text Text",
> Field.Store.NO, Field.Index.TOKENIZED ) );
> writer.addDocument(doc);
> writer.close();
> // search
> searcher = new IndexSearcher(dir);
> reader = IndexReader.open(dir);
> QueryParser qp = new QueryParser("contents", new
> StandardAnalyzer());
> Query query = qp.parse("stored and indexed text");
> String[] terms = {"stored", "indexed", "text"};
> Hits queryHits = searcher.search(query);
> // print results
> System.out.println( "Found " + queryHits.length() + "
> hits.");
> for(int i=0; i<queryHits.length(); i++){
> doc = queryHits.doc(i);
> System.out.println("*** " + doc.get("title") +
> " ***");
> int docID = queryHits.id(i);
> for (int j=0; j<terms.length; j++){
> TermDocs td = reader.termDocs( new
> Term("contents", terms[j]) );
> td.skipTo(docID);
> System.out.println( "Term '" + terms[j]
> + "' occures " +
> td.freq() + " time(s) in
> document nr. " + docID );
> }
> }
> }catch(Exception e){System.out.println("Darn");}
> }
> }
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