LTP GCOV extension - code coverage report
Current view: directory - usr/include/xapian - expanddecider.h
Test: lcov.info
Date: 2008-08-14 Instrumented lines: 1
Code covered: 100.0 % Executed lines: 1

       1                 : /** @file expanddecider.h
       2                 :  * @brief Allow rejection of terms during ESet generation.
       3                 :  */
       4                 : /* Copyright (C) 2007 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_EXPANDDECIDER_H
      22                 : #define XAPIAN_INCLUDED_EXPANDDECIDER_H
      23                 : 
      24                 : #include <set>
      25                 : #include <string>
      26                 : 
      27                 : #include <xapian/visibility.h>
      28                 : 
      29                 : namespace Xapian {
      30                 : 
      31                 : /** Virtual base class for expand decider functor. */
      32               5 : class XAPIAN_VISIBILITY_DEFAULT ExpandDecider {
      33                 :   public:
      34                 :     /** Do we want this term in the ESet? */
      35                 :     virtual bool operator()(const std::string &term) const = 0;
      36                 : 
      37                 :     /** Virtual destructor, because we have virtual methods. */
      38                 :     virtual ~ExpandDecider();
      39                 : };
      40                 : 
      41                 : /** ExpandDecider subclass which rejects terms using two ExpandDeciders.
      42                 :  *
      43                 :  *  Terms are only accepted if they are accepted by both of the specified
      44                 :  *  ExpandDecider objects.
      45                 :  */
      46                 : class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderAnd : public ExpandDecider {
      47                 :     const ExpandDecider &first, &second;
      48                 : 
      49                 :   public:
      50                 :     /** Terms will be checked with @a first, and if accepted, then checked
      51                 :      *  with @a second.
      52                 :      */
      53                 :     ExpandDeciderAnd(const ExpandDecider &first_,
      54                 :                      const ExpandDecider &second_)
      55                 :         : first(first_), second(second_) { }
      56                 : 
      57                 :     /** Compatibility method. */
      58                 :     ExpandDeciderAnd(const ExpandDecider *first_,
      59                 :                      const ExpandDecider *second_)
      60                 :         : first(*first_), second(*second_) { }
      61                 : 
      62                 :     virtual bool operator()(const std::string &term) const;
      63                 : };
      64                 : 
      65                 : /** ExpandDecider subclass which rejects terms in a specified list.
      66                 :  *
      67                 :  *  ExpandDeciderFilterTerms provides an easy way to filter out terms from
      68                 :  *  a fixed list when generating an ESet.
      69                 :  */
      70                 : class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderFilterTerms : public ExpandDecider {
      71                 :     std::set<std::string> rejects;
      72                 : 
      73                 :   public:
      74                 :     /** The two iterators specify a list of terms to be rejected.
      75                 :      *
      76                 :      *  @a reject_begin and @a reject_end can be any input_iterator type
      77                 :      *  which returns std::string or char * (e.g. TermIterator or char **).
      78                 :      */
      79                 :     template <class Iterator>
      80                 :     ExpandDeciderFilterTerms(Iterator reject_begin, Iterator reject_end)
      81                 :         : rejects(reject_begin, reject_end) { }
      82                 : 
      83                 :     virtual bool operator()(const std::string &term) const;
      84                 : };
      85                 : 
      86                 : }
      87                 : 
      88                 : #endif // XAPIAN_INCLUDED_EXPANDDECIDER_H

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