On 29 Nov 2005, at 10:05, Stefan Gusenbauer wrote:
This is an other good reason for buying the book ultimately!
Well, unfortunately, this particular trivia isn't covered in the
book, but rather behind the scenes of the website about the book. I
will mark this as something to add to the 2nd edition though.
Erik
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher [mailto:[EMAIL PROTECTED]
Gesendet: Dienstag, 29. November 2005 15:57
An: java-user@lucene.apache.org
Betreff: Re: AW: Determine the index of a hit after using
MultiSearcher
On 29 Nov 2005, at 08:51, Stefan Gusenbauer wrote:
I've done this in the same way every document contains a field with
the corresponding index. I fear there is no other way to do this.
Fear not. There is a way. In fact, lucenebook.com uses this
capability to determine whether a search hit is from the book content
or from the blog content. Here's a snippet of its code:
MultiSearcher searcher = (MultiSearcher) context.getAttribute
("searcher");
IndexReader[] readers = (IndexReader[]) context.getAttribute
("readers");
Hits hits = searcher.search(query);
HttpServletRequest request = cycle.getRequestContext
().getRequest();
int currentPage = request.getParameter("page") == null ? 1 :
Integer.parseInt(request.getParameter("pa
ge"));
int numPages = (hits.length() / RESULTS_PER_PAGE) +
(hits.length() % RESULTS_PER_PAGE == 0 ? 0 : 1);
if (currentPage > numPages) currentPage = numPages;
int numPages = (hits.length() / RESULTS_PER_PAGE) +
(hits.length() % RESULTS_PER_PAGE == 0 ? 0 : 1);
if (currentPage > numPages) currentPage = numPages;
if (currentPage < 1) currentPage = 1;
setProperty("currentPage", new Integer(currentPage)); //
reset in case original value is out of bound
s
int startHit = (currentPage - 1) * RESULTS_PER_PAGE + 1;
int endHit = currentPage * RESULTS_PER_PAGE;
if (endHit > hits.length()) {
endHit = hits.length();
}
setProperty("startHit", new Integer(startHit));
setProperty("endHit", new Integer(endHit));
setProperty("numPages", new Integer(numPages));
setProperty("numHits", new Integer(hits.length()));
logger.info("Query: " + expression + " : #hits = " +
hits.length() + " : page=" + currentPage);
if (hits.length() == 0) return;
ArrayList results = new ArrayList();
for (int i = startHit; i <= endHit; i++) {
int position = i - 1;
Document doc = hits.doc(position);
int indexIndex = searcher.subSearcher(hits.id(position));
// ...
}
The trick is to use searcher.subSearcher with the document number
from hits.
Erik
-----Ursprüngliche Nachricht-----
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Gesendet: Dienstag, 29. November 2005 14:48
An: java-user@lucene.apache.org
Betreff: Determine the index of a hit after using MultiSearcher
Hello,
I am searching over multiple indices using MultiSearcher. Thus I
get hits
from various indices. Is it possible to determine from which index
a hit
comes?
The solution I found is to store the index in a document's field,
but this
causes some overhead. I would like to find another solution.
Thank you for having read this!
Peter
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