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       1                 :            : /** @file valuestreamdocument.h
       2                 :            :  * @brief A document which gets its values from a ValueStreamManager.
       3                 :            :  */
       4                 :            : /* Copyright (C) 2009 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                 :            : #ifndef XAPIAN_INCLUDED_VALUESTREAMDOCUMENT_H
      22                 :            : #define XAPIAN_INCLUDED_VALUESTREAMDOCUMENT_H
      23                 :            : 
      24                 :            : #include "document.h"
      25                 :            : #include "valuelist.h"
      26                 :            : #include "xapian/types.h"
      27                 :            : 
      28                 :            : #include <map>
      29                 :            : 
      30                 :            : /// A document which gets its values from a ValueStreamManager.
      31                 :            : class ValueStreamDocument : public Xapian::Document::Internal {
      32                 :            :     /// Don't allow assignment.
      33                 :            :     void operator=(const ValueStreamDocument &);
      34                 :            : 
      35                 :            :     /// Don't allow copying.
      36                 :            :     ValueStreamDocument(const ValueStreamDocument &);
      37                 :            : 
      38                 :            :     mutable std::map<Xapian::valueno, ValueList *> valuelists;
      39                 :            : 
      40                 :            :     Xapian::Database db;
      41                 :            : 
      42                 :            :     size_t current;
      43                 :            : 
      44                 :            :     mutable Xapian::Document::Internal * doc;
      45                 :            : 
      46                 :            :   public:
      47                 :     175211 :     ValueStreamDocument(const Xapian::Database & db_)
      48                 :     175211 :         : Internal(db_.internal[0], 0), db(db_), current(0), doc(NULL) { }
      49                 :            : 
      50                 :            :     void new_subdb(int n);
      51                 :            : 
      52                 :            :     ~ValueStreamDocument();
      53                 :            : 
      54                 :   47266030 :     void set_document(Xapian::docid did_) {
      55                 :   47266030 :         did = did_;
      56         [ +  + ]:   47266030 :         delete doc;
      57                 :   47266030 :         doc = NULL;
      58                 :   47266030 :     }
      59                 :            : 
      60                 :            :     // Optimise away the virtual call when the matcher wants to know a value.
      61                 :      55611 :     string get_value(Xapian::valueno slot) const {
      62                 :      55611 :         return ValueStreamDocument::do_get_value(slot);
      63                 :            :     }
      64                 :            : 
      65                 :            :   private:
      66                 :            :     /** Implementation of virtual methods @{ */
      67                 :            :     string do_get_value(Xapian::valueno slot) const;
      68                 :            :     void do_get_all_values(map<Xapian::valueno, string> & values_) const;
      69                 :            :     string do_get_data() const;
      70                 :            :     /** @} */
      71                 :            : };
      72                 :            : 
      73                 :            : #endif // XAPIAN_INCLUDED_VALUESTREAMDOCUMENT_H