Hmm, yes, I should have thought of quoting the havadoc :-)
The Hits javadoc has been udpated though... we shouldn't be pushing
people toward collectors unless they really need them:
* TopDocs topDocs = searcher.search(query, numHits);
* ScoreDoc[] hits = topDocs.scoreDocs;
* for (int i = 0; i < hits.length; i++) {
* int docId = hits[i].doc;
* Document d = searcher.doc(docId);
* // do something with current hit
-Yonik
http://www.lucidimagination.com
On Tue, Oct 20, 2009 at 5:27 PM, Steven A Rowe <sar...@syr.edu> wrote:
> Hi Nathan,
>
> On 10/20/2009 at 5:03 PM, Nathan Howard wrote:
>> This is sort of related to the above question, but I'm trying to update
>> some (now depricated) Java/Lucene code that I've become aware of once we
>> started using 2.4.1 (we were previously using 2.3.2):
>>
>> Hits results = MultiSearcher.search(Query));
>>
>> int start = currentPage * resultsPerPage;
>> int stop = (currentPage + 1) * resultsPerPage();
>>
>> for(int x = start; (x < searchResults.length()) && (x < stop); x++)
>> {
>> Document doc = searchResults.doc(x);
>> // do search post-processing with the Document
>> }
>>
>> Results per page is normally small (10ish or so).
>>
>> I'm having difficulty figuring out how to get TopDocs to replicate this
>> paging functionality (which the application must maintain).
>
> From
> <http://lucene.apache.org/java/2_4_1/api/core/org/apache/lucene/search/Hits.html>:
> =====
> Deprecated. Hits will be removed in Lucene 3.0.
>
> Instead e. g. TopDocCollector and TopDocs can be used:
>
> TopDocCollector collector = new TopDocCollector(hitsPerPage);
> searcher.search(query, collector);
> ScoreDoc[] hits = collector.topDocs().scoreDocs;
> for (int i = 0; i < hits.length; i++) {
> int docId = hits[i].doc;
> Document d = searcher.doc(docId);
> // do something with current hit
> ...
> =====
>
> Construct the TopDocCollector with your "stop" variable instead of
> "hitsPerPage", initialize the loop control variable with the value of your
> "start" variable instead of 0, and you should be good to go.
>
> Steve
>
>
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