Hi
The code which you sent is only for query-filter
In the parse-filter and especially in index-fitler , do u
add it to any new
field which you define??
What i do is any data which i want to have ,i store it in
a new field
(created by me)
I guess the index-filter must be storing it in such a field
So you have to use FieldQueryFilter with this new field
type .(like
query-url and something like that)
Rgds
Prabhu
On 2/24/06, Vanderdray, Jacob <JVanderdray aarp.org> wrote:
>
> Doug,
>
> I'm actually implementing a QueryFilter
directly instead of
> extending one of the others. I'm setting the boost to
2.0. Here's the
> code:
>
> public class MetaQueryFilter implements QueryFilter {
>
> private static final Logger LOG = LogFormatter
> .getLogger(MetaQueryFilter.class.getName());
>
> /**
> * Need to pull out the list of meta tags from the
configuration
> */
> private static String [] META_TAGS =
>
NutchConf.get().getStrings("meta.names");
>
> /**
> * We're going to go through and create search
filters for each of the
> meta-tags we were asked to index.
> */
> public BooleanQuery filter(Query input, BooleanQuery
output) {
> // If no meta-tags were specified in
the conf file,
> then don't bother wasting cycles
> if ( META_TAGS.equals(null) ) {
> return output;
> }
>
> addTerms(input, output);
> return output;
> }
>
> private static void addTerms(Query input, BooleanQuery
output) {
> Clause[] clauses = input.getClauses();
> for (int x = 0; x < clauses.length;
x++) {
> Clause c = clauses[x];
> if
> (!c.getField().equals(Clause.DEFAULT_FIELD))
> continue;
// skip
> non-default fields
>
> // These are the
fields we're
> interested in indexing
> String [] tagsToIndex
= META_TAGS;
>
> for (int i = 0; i <
> tagsToIndex.length; ++i) {
>
LOG.info("Meta Query
> Filter: Adding a search for " + tagsToIndex[i]);
>
> Term
term = new
> Term(tagsToIndex[i], c.getTerm().toString());
>
> // add
a lucene
> PhraseQuery for this tag
>
PhraseQuery metaQuery
> = new PhraseQuery();
>
metaQuery.setSlop(0);
>
metaQuery.add(term);
>
> // set
boost
>
> metaQuery.setBoost(2.0f);
>
> // add
it as a
> specified query
>
output.add(metaQuery,
> false, false);
> }
> }
> }
>
> }
>
> -----Original Message-----
> From: Doug Cutting [mailto:cuttingapache.org]
> Sent: Thursday, February 23, 2006 5:09 PM
> To: nutch-userlucene.apache.org
> Subject: Re: Search Particulars
>
> Vanderdray, Jacob wrote:
> > I'm not sure I understand what you're
getting at. In this case
> > I've added a comma separated list of names of
meta tags that I want to
> > index and search against. I've written a parse
filter, an index
> filter
> > and this query filter that all read in that list
of meta tags from the
> > nutch-site.xml file.
> >
> > That much seems to work. In the explain
link I can see that the
> > fields are in the index and the ranking of pages
are affected by them,
> > but if I search for a term which is in one of the
meta tags, but not
> in
> > any other fields I get 0 results.
>
> Are you using RawFieldQueryFilter? If so, are you
specifying a non-zero
>
> boost to the constructor? RawFieldQueryFilter defaults
to a zero boost.
>
> Query terms with a zero boost are automatically
converted into
> filters. And filters cannot select documents, only
remove them.
>
> Doug
>
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