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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