Thank You Hoss (You all are always very responsive...),
actually I've developed my own FacetRequestHandler extending the query
format and adding a showfacet parameter (it's a little custom on our needs,
but I'd like to publish it when we have finished).
What I do is the merge of some ideas from the forum; my query is now in
three parts
q=query;sort;filters
where filters is a list of query-clauses separated by commas that I parse to
get filterField and filterValue, then for every filter:
filterList.add(QueryParsing.parseQuery(createQueryString("filterField:filterValue",
defaultField, req.getSchema()));
then I use filterList in the main query in
DocListAndSet results =
req.getSearcher().getDocListAndSet(query,filterList,sort,...
Then, if requested with showfacets parameter, I get facets extracting and
parsing a facetXML descriptor from a facet-type document in the index,
querying for the facet descriptor of the current category i get from the
filter list (similar to CNET, i think).
To calculate counts for every facet composed of a field and a value, based
on the main query, I use
facetCount =
searcher.numDocs(QueryParsing.parseQuery("facetField:facetValue", "",
req.getSchema()), results.docSet);
Now, how could I get a fiter for the missing field ?
Can I use the unbounded range trick simply adding a facet (and filter) like
this:
facetCount = searcher.numDocs(QueryParsing.parseQuery("-fieldName:[* TO
*]", "", req.getSchema()), results.docSet);
...since i use results.docSet of the base query (the same for filters I
think) ?
Or there is a better way ?
Thank You again
Fabio
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