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       1                 :            : /** @file slowvaluelist.h
       2                 :            :  * @brief Slow implementation for backends which don't streamed values.
       3                 :            :  */
       4                 :            : /* Copyright (C) 2007,2008 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_SLOWVALUELIST_H
      22                 :            : #define XAPIAN_INCLUDED_SLOWVALUELIST_H
      23                 :            : 
      24                 :            : #include "valuelist.h"
      25                 :            : 
      26                 :            : #include "xapian/database.h"
      27                 :            : 
      28                 :            : /** Slow implementation for backends which don't streamed values.
      29                 :            :  *
      30                 :            :  *  Used by flint, inmemory, and remote backends.
      31                 :            :  */
      32 [ +  - ][ #  # ]:       8751 : class SlowValueList : public ValueList {
      33                 :            :     /// Don't allow assignment.
      34                 :            :     void operator=(const SlowValueList &);
      35                 :            : 
      36                 :            :     /// Don't allow copying.
      37                 :            :     SlowValueList(const SlowValueList &);
      38                 :            : 
      39                 :            :     /// The database.
      40                 :            :     Xapian::Database db;
      41                 :            : 
      42                 :            :     /// The last docid in the database, or 0 if we're at_end.
      43                 :            :     Xapian::docid last_docid;
      44                 :            : 
      45                 :            :     /// The value slot we're iterating over.
      46                 :            :     Xapian::valueno slot;
      47                 :            : 
      48                 :            :     /// The value at the current position.
      49                 :            :     std::string current_value;
      50                 :            : 
      51                 :            :     /// The document id at the current position.
      52                 :            :     Xapian::docid current_did;
      53                 :            : 
      54                 :            :   public:
      55                 :       8751 :     SlowValueList(const Xapian::Database &db_, Xapian::valueno slot_)
      56                 :       8751 :         : db(db_), last_docid(db.get_lastdocid()), slot(slot_), current_did(0)
      57                 :       8751 :     { }
      58                 :            : 
      59                 :            :     Xapian::docid get_docid() const;
      60                 :            : 
      61                 :            :     std::string get_value() const;
      62                 :            : 
      63                 :            :     Xapian::valueno get_valueno() const;
      64                 :            : 
      65                 :            :     bool at_end() const;
      66                 :            : 
      67                 :            :     void next();
      68                 :            : 
      69                 :            :     void skip_to(Xapian::docid);
      70                 :            : 
      71                 :            :     bool check(Xapian::docid did);
      72                 :            : 
      73                 :            :     std::string get_description() const;
      74                 :            : };
      75                 :            : 
      76                 :            : #endif // XAPIAN_INCLUDED_SLOWVALUELIST_H