Hey Andy,
It would be interesting how many ids you include into your query. I do
have just a couple of usergroups for that.
I create a BooleanQuery
BooleanQuery q = new BooleanQuery();
q.add(new BooleanClause(new TermQuery(new
Term("idfield","id")),BooleanClause.Occur.MUST));
QueryFilter filter = new QueryFilter(q);
searcher.search(yourActualQuery,filter);
you can put your created filters into a HashSet or event better in a
weak hashset to cache the queryfilter and reuse them. The hash value
of a query filter depends on the acutal query so that should be fine.
Just have a look at QueryFilter#hashCode().
if you got a large set of ids take care on BooleanQuery.setMaxClauseCount()
You can also keep your filter if you close your indexwriter and
release a new indexsearcher as the queryfilter caches the reader
instance internally.
best regards simon
On 8/8/06, hu andy <[EMAIL PROTECTED]> wrote:
Hey,Simon, thanks for your reply
I have an ID Field in the index. For the efficiency of indexing speed, I put
some fields in
a database, because I found the total of fields in a Document will badly
degrade the indexing speed. So for the search, I will first query the
database to get a list of ID, then use the list to check whether the Lucene
seached results should be returned.
Can you give some suggestion?
Also can you show me to how you use filter?
2006/8/8, Simon Willnauer <[EMAIL PROTECTED]>:
>
Hey Andy,
i don't know how you determinate whether a document has to be
displayed or not but I use a filter to do such kind of jobs. We have a
index for a specific website with personalized areas which should be
searchable for users having corresponding usergroups. That works quiet
well and you can use the filter cache e.g. cache the filter itself for
your queries.
regards Simon
On 8/7/06, hu andy <[EMAIL PROTECTED]> wrote:
> Martin, Thank you for your reply.
>
> But the Lucene API said:
> This is called in an inner search loop. For good search performance,
> implementations of this method should not call
> Searcher.doc(int)<
file:///E:/java/IR%20Library/lucene-1.9.1/lucene-1.9.1/docs/api/org/apache/lucene/search/Searcher.html#doc(int)>or
> IndexReader.document(int)<
file:///E:/java/IR%20Library/lucene-1.9.1/lucene-1.9.1/docs/api/org/apache/lucene/index/IndexReader.html#document(int)>on
> every document number encountered
>
> Because I have to check a field in the document to determine whether I
> should return the document. The total number of documents is about two
> hundred thousand. So I'm afraid the
> performance
>
>
> 2006/8/7, Martin Braun < [EMAIL PROTECTED]>:
> >
> > hi andy,
> > > How can I use HitCollector to iterate over every returned document?
> >
> > You have to override the function collect for the HitCollector class and
> > then store the retrieved Data in an array or map.
> >
> > Here is just a source-code scratch (is = IndexSearcher)
> >
> > is.search(query, null, new HitCollector(){
> > public void collect(int
docID, float score)
> > {
> > Document doc =
is.doc(docID);
> > titles[docID] =
doc.get("title");
> > }
> > });
> >
> >
> > hth,
> > martin
> >
> >
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>
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