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TopDocsCollector.h
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1 // Copyright (c) 2009-2011 Alan Wright. All rights reserved.
3 // Distributable under the terms of either the Apache License (Version 2.0)
4 // or the GNU Lesser General Public License.
6 
7 #ifndef TOPDOCSCOLLECTOR_H
8 #define TOPDOCSCOLLECTOR_H
9 
10 #include "Collector.h"
11 #include "PriorityQueue.h"
12 
13 namespace Lucene
14 {
21  class LPPAPI TopDocsCollector : public Collector
22  {
23  public:
25  virtual ~TopDocsCollector();
26 
28 
29  protected:
33  HitQueueBasePtr pq;
34 
36  int32_t totalHits;
37 
38  public:
40  virtual int32_t getTotalHits();
41 
43  virtual TopDocsPtr topDocs();
44 
54  virtual TopDocsPtr topDocs(int32_t start);
55 
66  virtual TopDocsPtr topDocs(int32_t start, int32_t howMany);
67 
68  protected:
70  static TopDocsPtr EMPTY_TOPDOCS();
71 
74  virtual void populateResults(Collection<ScoreDocPtr> results, int32_t howMany);
75 
79  virtual TopDocsPtr newTopDocs(Collection<ScoreDocPtr> results, int32_t start);
80  };
81 }
82 
83 #endif

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