On Thu, 27 Aug 2009 10:48:42 +0200, Emmanuel Bernard
<emman...@hibernate.org> wrote:
> Did I make my case?
Yes. I can agree that your code is more readable and it will help building
queries.
That said, why not suggesting something like this to the Lucene folks
directly. I agree on
this one with Manik.
--Hardy
> String search = "harry potter";
> SealedQueryBuilder qb = searchFactory.withEntityAnalyzer(Book.class);
> Query luceneQuery =
> qb.searchInMultipleFields()
> .onField("title").boostedTo(4)
> .onField("title_ngram")
> .onField("description")
> .onField("description_ngram").boostedTo(.25)
> .forWords(search);
>
> vs
>
> String search = "harry potter";
> Analyzer analyzer = searchFactory.getAnalyzer(Book.class);
> Map<String,Float> boostPerField = new HashMap<String,Float>(2); //
> boost factors
> boostPerField.put( "title", (float) 4);
> boostPerField.put( "title_ngram", (float) 1);
> boostPerField.put( "description", (float) 1);
> boostPerField.put( "description_ngram", (float) .25);
>
> BooleanQuery luceneQuery = new BooleanQuery();
> for ( Map.Entry<String, Float> entry : boostPerField.entrySet() ) {
> final String fieldName = entry.getKey();
> final Float boost = entry.getValue();
>
> List<String> terms = new ArrayList<String>();
> try {
> Reader reader = new StringReader(search);
> TokenStream stream = analyzer.tokenStream( fieldName, reader);
> Token token = new Token();
> token = stream.next(token);
> while (token != null) {
> if (token.termLength() != 0) {
> String term = new String(token.termBuffer(), 0,
> token.termLength());
> terms.add( term );
> }
> token = stream.next(token);
> }
> }
> catch ( IOException e ) {
> throw new RuntimeException("IO exception while reading String
> stream??", e);
> }
>
> for (String term : terms) {
> TermQuery termQuery = new TermQuery( new Term( fieldName, term
> ) );
> termQuery.setBoost( boost );
> luceneQuery.add( termQuery, BooleanClause.Occur.SHOULD );
> }
> }
>
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