xapian-core/backends/multi/multi_termlist.cc

   1 /** @file
   2  * @brief Adapter class for a TermList in a multidatabase
   3  */
   4 /* Copyright (C) 2007,2008,2009,2011,2017,2024 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (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 #include <config.h>
  22
  23 #include "multi_termlist.h"
  24
  25 #include <xapian/database.h>
  26
  27 #include "backends/databaseinternal.h"
  28 #include "backends/multi.h"
  29 #include "omassert.h"
  30
  31 using namespace std;
  32
  33 MultiTermList::MultiTermList(const Xapian::Database::Internal* db_,
  34                              TermList* real_termlist_)
  35     : real_termlist(real_termlist_), db(db_)
  36 {
  37 }
  38
  39 MultiTermList::~MultiTermList()
  40 {
  41     delete real_termlist;
  42 }
  43
  44 Xapian::termcount
  45 MultiTermList::get_approx_size() const
  46 {
  47     return real_termlist->get_approx_size();
  48 }
  49
  50 Xapian::termcount
  51 MultiTermList::get_wdf() const
  52 {
  53     return real_termlist->get_wdf();
  54 }
  55
  56 Xapian::doccount
  57 MultiTermList::get_termfreq() const
  58 {
  59     Xapian::doccount result;
  60     db->get_freqs(real_termlist->get_termname(), &result, NULL);
  61     return result;
  62 }
  63
  64 TermList *
  65 MultiTermList::next()
  66 {
  67     TermList* res = real_termlist->next();
  68     if (res) {
  69         // No more entries (prune shouldn't happen).
  70         Assert(res == real_termlist);
  71         return this;
  72     }
  73     current_term = real_termlist->get_termname();
  74     return NULL;
  75 }
  76
  77 TermList*
  78 MultiTermList::skip_to(std::string_view term)
  79 {
  80     TermList* res = real_termlist->skip_to(term);
  81     if (res) {
  82         // No more entries (prune shouldn't happen).
  83         Assert(res == real_termlist);
  84         return this;
  85     }
  86     current_term = real_termlist->get_termname();
  87     return NULL;
  88 }
  89
  90 Xapian::termcount
  91 MultiTermList::positionlist_count() const
  92 {
  93     return real_termlist->positionlist_count();
  94 }
  95
  96 PositionList*
  97 MultiTermList::positionlist_begin() const
  98 {
  99     return real_termlist->positionlist_begin();
 100 }