Thanks, it's a FAQ entry now:
How do I write my own Analyzer?
http://www.jguru.com/faq/view.jsp?EID=1006122
Otis
--- Doug Cutting <[EMAIL PROTECTED]> wrote:
> karl �ie wrote:
> > I have a Lucene Document with a field named "element" which is
> stored
> > and indexed but not tokenized. The value of the field is "POST"
> > (uppercase). But the only way i can match the field is by entering
> > "element:POST?" or "element:POST*" in the QueryParser class.
>
> There are two ways to do this.
>
> If this must be entered by users in the query string, then you need
> to
> use a non-lowercasing analyzer for this field. The way to do this if
>
> you're currently using StandardAnalyzer, is to do something like:
>
> public class MyAnalyzer extends Analyzer {
> private Analyzer standard = new StandardAnalyzer();
> public TokenStream tokenStream(String field, final Reader
> reader) {
> if ("element".equals(field)) { // don't tokenize
> return new CharTokenizer(reader) {
> protected boolean isTokenChar(char c) { return true; }
> };
> } else { // use standard analyzer
> return standard.tokenStream(field, reader);
> }
> }
> }
>
> Analyzer analyzer = new MyAnalyzer();
> Query query = queryParser.parse("... +element:POST", analyzer);
>
> Alternately, if this query field is added by a program, then this can
> be
> done by bypassing the analyzer for this class, building this clause
> directly instead:
>
> Analyzer analyzer = new StandardAnalyzer();
> BooleanQuery query = (BooleanQuery)queryParser.parse("...",
> analyzer);
>
> // now add the element clause
> query.add(new TermQuery(new Term("element", "POST"))), true,
> false);
>
> Perhaps this should become an FAQ...
>
> Doug
>
>
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