Hello Mohammad,
please could you write how you instantiate the highlighter? Which scorer do you
use?
Are you using the highlighter version from the highlighter branch?
I would try to find the place, where the exception is thrown.
But still, there is a problem along with the ConstantScoreQuery. Both ways to
highlight a document
that are available now will not work because:
1) If you use the "basic" highlighting - means you use the
CL_NS2(search,highlight)::QueryScorer - than this scorer calls the
extractTerms() method which is not
implemented in ConstantScoreQuery as this query uses filters to match
documents.
2 the "exact" highlighting - means you use the
CL_NS2(search,highlight)::SpanHighlightScorer - also does not highlight
ConstantScoreQueries for the same reason.
But, you could use this scorer with the original WildcardQuery and allow
rewriting queries in place. Then if your documents are not too long and
the single documents does not contain more the the max clause limit different
matching terms, then this would work.
If you want to use the new highlighter scorer then I could send you piece of
code, how to call it.
Jiri
From: Ben van Klinken [mailto:bvanklin...@gmail.com]
Sent: Wednesday, January 05, 2011 12:19 AM
To: clucene-developers@lists.sourceforge.net
Subject: Re: [CLucene-dev] CLucene-developers Digest, Vol 57, Issue 2
Hi,
The highlighter has changed a lot since i touched it last. Ask Jiri, he sent an
email about a week ago to the list saying that he had made some changes
Ben
On Tue, Jan 4, 2011 at 11:09 AM, muhammad ismael <m.ismae...@gmail.com> wrote:
I tried to use WildcardFilter so i sub-classed QueryParser and reimplemented
getWildcardQuery function
CL_NS(search)::Query* WildQueryParser::getWildcardQuery(const TCHAR* _field,
TCHAR* termStr)
{
Query * query = QueryParser::getWildcardQuery(_field, termStr);
const char * objectName = query->getObjectName();
if(strcmp(objectName, "WildcardQuery") == 0)
{
// _CLDELETE(objectName);
Term* t = _CLNEW Term(_field, termStr);
WildcardFilter * f = new WildcardFilter(t);
Query* q = new ConstantScoreQuery(f);
// _CLDELETE(t);
return q;
}
// _CLDELETE(objectName);
return query;// now query is not wildcardQuery so i will return it as it is.
}
and it searches without any errors and return the results correctly.
but when i tried to highlight search results i got the following error
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct NULL not valid
so i tried to debug and see where is the problem but i am lost in code but i
think the problem
is in the function
TextFragment** Highlighter::getBestTextFragments(
StringBuffer* writeTo,
TokenStream * tokenStream,
const TCHAR* text,
bool mergeContiguousFragments,
int32_t maxNumFragments)
I tried to debug this function many times , I don't know if i am doing
something wrong or not?
Mohammad Ismael
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