00001
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021 #ifndef XAPIAN_INCLUDED_EXPANDDECIDER_H
00022 #define XAPIAN_INCLUDED_EXPANDDECIDER_H
00023
00024 #include <set>
00025 #include <string>
00026
00027 #include <xapian/visibility.h>
00028
00029 namespace Xapian {
00030
00032 class XAPIAN_VISIBILITY_DEFAULT ExpandDecider {
00033 public:
00035 virtual bool operator()(const std::string &term) const = 0;
00036
00038 virtual ~ExpandDecider();
00039 };
00040
00046 class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderAnd : public ExpandDecider {
00047 const ExpandDecider &first, &second;
00048
00049 public:
00053 ExpandDeciderAnd(const ExpandDecider &first_,
00054 const ExpandDecider &second_)
00055 : first(first_), second(second_) { }
00056
00058 ExpandDeciderAnd(const ExpandDecider *first_,
00059 const ExpandDecider *second_)
00060 : first(*first_), second(*second_) { }
00061
00062 virtual bool operator()(const std::string &term) const;
00063 };
00064
00070 class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderFilterTerms : public ExpandDecider {
00071 std::set<std::string> rejects;
00072
00073 public:
00079 template <class Iterator>
00080 ExpandDeciderFilterTerms(Iterator reject_begin, Iterator reject_end)
00081 : rejects(reject_begin, reject_end) { }
00082
00083 virtual bool operator()(const std::string &term) const;
00084 };
00085
00086 }
00087
00088 #endif // XAPIAN_INCLUDED_EXPANDDECIDER_H