Hi
I wrote the following class:
public class AlwaysPrefixMultiFieldQP extends MultiFieldQueryParser {
public MyQP(String[] fields, Analyzer analyzer) {
super(fields, analyzer);
}
protected Query getFieldQuery(String field, String queryText) throws
ParseException {
if (field != null) {
return new PrefixQuery(new Term(field, queryText));
}
return super.getFieldQuery(field, queryText);
}
}
What it does is override getFieldQuery. If the field is not null, it creates
a new PrefixQuery. Following is a sample code:
AlwaysPrefixMultiFieldQP m = new AlwaysPrefixMultiFieldQP(new
String[] { "field" }, analyzer);
Query q = m.parse("sof was");
System.out.println(q);
This code prints: (field:sof*) (field:was*), which is I believe what you
need.
As for splitting the query (pre processing) - this is not recommended. It
may work great for space separated languages, however may produce poor
results for Asian languages (for example). The way I propose above makes use
of the Analyzer you use, thus guarantees you append a '*' to all the words
in the query.
Hope this helps.
On Nov 22, 2007 3:35 PM, Erick Erickson <[EMAIL PROTECTED]> wrote:
> The simplest way would be to pre-process the query. That
> is, just split on words and add the '*' as appropriate.
>
> Erick
>
> On Nov 21, 2007 2:16 PM, Anders Lybecker <[EMAIL PROTECTED]> wrote:
>
> > How do I force the MultiFieldQueryParser to interpret a string like
> > "dock boat" as "dock* boat*" and therefore use PrefixQuery instead of
> > TemQuery?
> >
> > The customer wants always to search with <word>* as default when
> entering
> > <word>
> >
> > :-)
> > Anders Lybecker
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
--
Regards,
Shai Erera
