xapian-core/matcher/spymaster.h

   1 /** @file spymaster.h
   2  * @brief Class for managing MatchSpy objects during the match
   3  */
   4 /* Copyright 2017 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifndef XAPIAN_INCLUDED_SPYMASTER_H
  22 #define XAPIAN_INCLUDED_SPYMASTER_H
  23
  24 #include <xapian/intrusive_ptr.h>
  25 #include <xapian/matchspy.h>
  26
  27 #include <vector>
  28
  29 class SpyMaster {
  30     typedef Xapian::Internal::opt_intrusive_ptr<Xapian::MatchSpy> opt_ptr_spy;
  31
  32     /// The MatchSpy objects to apply.
  33     const std::vector<opt_ptr_spy>* spies;
  34
  35   public:
  36     explicit SpyMaster(const std::vector<opt_ptr_spy>* spies_)
  37         : spies(spies_->empty() ? NULL : spies_)
  38     {}
  39
  40     operator bool() const { return spies != NULL; }
  41
  42     void operator()(const Xapian::Document& doc,
  43                     double weight) {
  44         if (spies != NULL) {
  45             for (auto spy : *spies) {
  46                 (*spy)(doc, weight);
  47             }
  48         }
  49     }
  50 };
  51
  52 #endif // XAPIAN_INCLUDED_SPYMASTER_H