Hi Shawn,
This is time consuming operation. I already have this in my application .
I was pondering whether I can get bit set from both the solr indexes ,
bitset.and then retrieve only those matched? I don't know how do I
retrieve bitset. - wanted to try this and test the performance.
Regards
Michael
On Sun, Oct 13, 2013 at 8:54 PM, Shawn Heisey <s...@elyograg.org> wrote:
> On 10/13/2013 8:34 AM, Michael Tyler wrote:
> > Hello,
> >
> > I have 2 different solr indexes returning 2 different sets of
> > SolrDocumentList. Doc Id is the foreign key relation.
> >
> > After obtaining them, I want to perform "AND" operation between them and
> > then return results to user. Can you tell me how do I get this? I am
> using
> > solr 4.3
> >
> > SolrDocumentList results1 = responseA.getResults();
> > SolrDocumentList results2 = responseB.getResults();
> >
> > results1 : d1, d2, d3
> > results2 : d1,d2, d4
>
> The SolrDocumentList class extends ArrayList<SolrDocument>, which means
> that it inherits all ArrayList functionality. Unfortunately, there's no
> built-in way of eliminating duplicates with a java List. It's very easy
> to combine the two results into another object, but that object will
> contain both of the d1 and both of the d2 SolrDocument objects.
>
> The following code is a reasonably fast way to handle this. It assumes
> that results1 is the list that should win when there are duplicates, so
> it gets added first. It assumes that the uniqueKey field is named "id"
> and that it contains a String value. If these are incorrect
> assumptions, you can adjust the code accordingly.
>
> SolrDocumentList results1 = responseA.getResults();
> SolrDocumentList results2 = responseB.getResults();
> List<SolrDocumentList> tmpList = new ArrayList<SolrDocumentList>();
> tmpList.add(results1);
> tmpList.add(results2);
>
> Set<String> tmpSet = new HashSet<String>();
> SolrDocumentList newList = new SolrDocumentList();
> for (SolrDocumentList l : tmpList)
> {
> for (SolrDocument d : l)
> {
> String id = (String) d.get("id");
> if (tmpSet.contains(id)) {
> continue;
> }
> tmpSet.add(id);
> newList.add(d);
> }
> }
>
> Thanks,
> Shawn
>
>
