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<td class="headerValue" width="80%" colspan=4><a href="../../../index.html">directory</a> - <a href="index.html">usr/include/xapian</a> - expanddecider.h</td>
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<td class="headerItem" width="20%">Date:</td>
<td class="headerValue" width="20%">2008-08-14</td>
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<td><pre class="source">
<span class="lineNum"> 1 </span> : /** @file expanddecider.h
<span class="lineNum"> 2 </span> : * @brief Allow rejection of terms during ESet generation.
<span class="lineNum"> 3 </span> : */
<span class="lineNum"> 4 </span> : /* Copyright (C) 2007 Olly Betts
<span class="lineNum"> 5 </span> : *
<span class="lineNum"> 6 </span> : * This program is free software; you can redistribute it and/or
<span class="lineNum"> 7 </span> : * modify it under the terms of the GNU General Public License as
<span class="lineNum"> 8 </span> : * published by the Free Software Foundation; either version 2 of the
<span class="lineNum"> 9 </span> : * License, or (at your option) any later version.
<span class="lineNum"> 10 </span> : *
<span class="lineNum"> 11 </span> : * This program is distributed in the hope that it will be useful,
<span class="lineNum"> 12 </span> : * but WITHOUT ANY WARRANTY; without even the implied warranty of
<span class="lineNum"> 13 </span> : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<span class="lineNum"> 14 </span> : * GNU General Public License for more details.
<span class="lineNum"> 15 </span> : *
<span class="lineNum"> 16 </span> : * You should have received a copy of the GNU General Public License
<span class="lineNum"> 17 </span> : * along with this program; if not, write to the Free Software
<span class="lineNum"> 18 </span> : * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
<span class="lineNum"> 19 </span> : */
<span class="lineNum"> 20 </span> :
<span class="lineNum"> 21 </span> : #ifndef XAPIAN_INCLUDED_EXPANDDECIDER_H
<span class="lineNum"> 22 </span> : #define XAPIAN_INCLUDED_EXPANDDECIDER_H
<span class="lineNum"> 23 </span> :
<span class="lineNum"> 24 </span> : #include <set>
<span class="lineNum"> 25 </span> : #include <string>
<span class="lineNum"> 26 </span> :
<span class="lineNum"> 27 </span> : #include <xapian/visibility.h>
<span class="lineNum"> 28 </span> :
<span class="lineNum"> 29 </span> : namespace Xapian {
<span class="lineNum"> 30 </span> :
<span class="lineNum"> 31 </span> : /** Virtual base class for expand decider functor. */
<span class="lineNum"> 32 </span><span class="lineCov"> 5 : class XAPIAN_VISIBILITY_DEFAULT ExpandDecider {</span>
<span class="lineNum"> 33 </span> : public:
<span class="lineNum"> 34 </span> : /** Do we want this term in the ESet? */
<span class="lineNum"> 35 </span> : virtual bool operator()(const std::string &term) const = 0;
<span class="lineNum"> 36 </span> :
<span class="lineNum"> 37 </span> : /** Virtual destructor, because we have virtual methods. */
<span class="lineNum"> 38 </span> : virtual ~ExpandDecider();
<span class="lineNum"> 39 </span> : };
<span class="lineNum"> 40 </span> :
<span class="lineNum"> 41 </span> : /** ExpandDecider subclass which rejects terms using two ExpandDeciders.
<span class="lineNum"> 42 </span> : *
<span class="lineNum"> 43 </span> : * Terms are only accepted if they are accepted by both of the specified
<span class="lineNum"> 44 </span> : * ExpandDecider objects.
<span class="lineNum"> 45 </span> : */
<span class="lineNum"> 46 </span> : class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderAnd : public ExpandDecider {
<span class="lineNum"> 47 </span> : const ExpandDecider &first, &second;
<span class="lineNum"> 48 </span> :
<span class="lineNum"> 49 </span> : public:
<span class="lineNum"> 50 </span> : /** Terms will be checked with @a first, and if accepted, then checked
<span class="lineNum"> 51 </span> : * with @a second.
<span class="lineNum"> 52 </span> : */
<span class="lineNum"> 53 </span> : ExpandDeciderAnd(const ExpandDecider &first_,
<span class="lineNum"> 54 </span> : const ExpandDecider &second_)
<span class="lineNum"> 55 </span> : : first(first_), second(second_) { }
<span class="lineNum"> 56 </span> :
<span class="lineNum"> 57 </span> : /** Compatibility method. */
<span class="lineNum"> 58 </span> : ExpandDeciderAnd(const ExpandDecider *first_,
<span class="lineNum"> 59 </span> : const ExpandDecider *second_)
<span class="lineNum"> 60 </span> : : first(*first_), second(*second_) { }
<span class="lineNum"> 61 </span> :
<span class="lineNum"> 62 </span> : virtual bool operator()(const std::string &term) const;
<span class="lineNum"> 63 </span> : };
<span class="lineNum"> 64 </span> :
<span class="lineNum"> 65 </span> : /** ExpandDecider subclass which rejects terms in a specified list.
<span class="lineNum"> 66 </span> : *
<span class="lineNum"> 67 </span> : * ExpandDeciderFilterTerms provides an easy way to filter out terms from
<span class="lineNum"> 68 </span> : * a fixed list when generating an ESet.
<span class="lineNum"> 69 </span> : */
<span class="lineNum"> 70 </span> : class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderFilterTerms : public ExpandDecider {
<span class="lineNum"> 71 </span> : std::set<std::string> rejects;
<span class="lineNum"> 72 </span> :
<span class="lineNum"> 73 </span> : public:
<span class="lineNum"> 74 </span> : /** The two iterators specify a list of terms to be rejected.
<span class="lineNum"> 75 </span> : *
<span class="lineNum"> 76 </span> : * @a reject_begin and @a reject_end can be any input_iterator type
<span class="lineNum"> 77 </span> : * which returns std::string or char * (e.g. TermIterator or char **).
<span class="lineNum"> 78 </span> : */
<span class="lineNum"> 79 </span> : template <class Iterator>
<span class="lineNum"> 80 </span> : ExpandDeciderFilterTerms(Iterator reject_begin, Iterator reject_end)
<span class="lineNum"> 81 </span> : : rejects(reject_begin, reject_end) { }
<span class="lineNum"> 82 </span> :
<span class="lineNum"> 83 </span> : virtual bool operator()(const std::string &term) const;
<span class="lineNum"> 84 </span> : };
<span class="lineNum"> 85 </span> :
<span class="lineNum"> 86 </span> : }
<span class="lineNum"> 87 </span> :
<span class="lineNum"> 88 </span> : #endif // XAPIAN_INCLUDED_EXPANDDECIDER_H
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<tr><td class="versionInfo">Generated by: <a href="http://ltp.sourceforge.net/coverage/lcov.php" target="_parent">LTP GCOV extension version 1.6</a></td></tr>
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