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comparison lucene/src/luan/modules/lucene/Lucene.luan @ 257:c5c60eca33dd

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allow Lucene search for 0 rows git-svn-id: https://luan-java.googlecode.com/svn/trunk@258 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 28 Oct 2014 03:05:37 +0000
parents ef39bc4d3f70
children 9e0d4452e649
comparison
equal deleted inserted replaced
256:15122d724ce4 257:c5c60eca33dd
15 index.Writer( function(writer) 15 index.Writer( function(writer)
16 writer.delete_documents(terms) 16 writer.delete_documents(terms)
17 end ) 17 end )
18 end 18 end
19 19
20 function index.get_first(query, sort)
21 return index.Searcher( function(searcher)
22 local results, _, total_hits = searcher.search(query,1,sort)
23 return results(), total_hits
24 end )
25 end
26
20 function index.get_document(query) 27 function index.get_document(query)
28 local doc, total_hits = index.get_first(query);
29 if total_hits > 1 then
30 error( "found " .. total_hits .. " documents" )
31 end
32 return doc
33 end
34
35 function index.count(query)
21 return index.Searcher( function(searcher) 36 return index.Searcher( function(searcher)
22 local results, _, total_hits = searcher.search(query,1) 37 local _, _, total_hits = searcher.search(query,0)
23 if total_hits == 0 then 38 return total_hits
24 return nil
25 elseif total_hits > 1 then
26 error( "found " .. total_hits .. " documents" )
27 end
28 return results()
29 end ) 39 end )
30 end 40 end
31 41
32 return index 42 return index
33 end 43 end