Hello,
> I seem to be having trouble matching the value "No". The
> snippet of my insert index code looks like this:
> --------------------
> IndexWriter writer = new IndexWriter("indexTest", new
> StandardAnalyzer(), true);
> Document doc = new Document();
> doc.add(Field.Text("YesNo", choice));
> writer.addDocument(doc);
> writer.optimize();
> writer.close();
> -------------------
> where the value of the variable choice is either a "Yes" or a "No"
> and the code to search it looks like this :
>
> ---------------------
> IndexSearcher searcher = new
> IndexSearcher(IndexReader.open("indexTest"));
> Analyzer analyzer = new StandardAnalyzer();
> Query query =
> org.apache.lucene.queryParser.QueryParser.parse(queryString,
> "YesNo", analyzer);
> Hits hits = searcher.search(query);
> System.out.println("Found "+hits.length()+" match");
>
> ---------------------
> where the value of queryString contains the user input which
> is wither a "Yes" or "No"
>
>
> Whenever I insert a "No", I would not be able to retrieve it
> (the output will show 0 mtaches) even though I use the same
> analyzer. Any other values like "Yes","n","y" would get hits.
> Has anyone went through similar errors? Is this a bug or is
> it some limitation, where lucene can't accept string values
> of "No"? Or am i missing something?
>
The StandardAnalyzer uses a small list of english stop words. These are
common word, which will be ignored, e.g. "no" or "a". Checkout
org.apache.lucene.analysis.standard.StandardAnalyser for the full list.
You have to write your own analyzer. This is very easy: Copy the code from
StandardAnalyzer to your own class and remove the StopFilter or change
the list of Stopwords. Don't forget to rebuild your index after this.
Regards,
Wolf-Dietrich
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Wolf-Dietrich Materna
Development
empolis GmbH - arvato knowledge management
Kekul�str. 7
12489 Berlin, Germany
phone : +49-30-6780-6510
fax : +49-30-6780-6549
<<mailto:[EMAIL PROTECTED]>> <<http://www.empolis.com>>
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