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00025 #ifndef XAPIAN_INCLUDED_QUERY_H
00026 #define XAPIAN_INCLUDED_QUERY_H
00027
00028 #include <string>
00029 #include <vector>
00030
00031 #include <xapian/base.h>
00032 #include <xapian/types.h>
00033 #include <xapian/termiterator.h>
00034 #include <xapian/visibility.h>
00035
00036
00037
00038
00039 class MultiMatch;
00040 class LocalSubMatch;
00041 struct SortPosName;
00042
00043 namespace Xapian {
00044
00049 class XAPIAN_VISIBILITY_DEFAULT Query {
00050 public:
00052 class Internal;
00054 Xapian::Internal::RefCntPtr<Internal> internal;
00055
00057 typedef enum {
00059 OP_AND,
00060
00062 OP_OR,
00063
00065 OP_AND_NOT,
00066
00068 OP_XOR,
00069
00071 OP_AND_MAYBE,
00072
00074 OP_FILTER,
00075
00084 OP_NEAR,
00085
00094 OP_PHRASE,
00095
00097 OP_VALUE_RANGE,
00098
00102 OP_ELITE_SET = 10
00103 } op;
00104
00106 Query(const Query & copyme);
00107
00109 Query & operator=(const Query & copyme);
00110
00119 Query();
00120
00122 ~Query();
00123
00125 Query(const std::string & tname_, Xapian::termcount wqf_ = 1,
00126 Xapian::termpos pos_ = 0);
00127
00129 Query(Query::op op_, const Query & left, const Query & right);
00130
00132 Query(Query::op op_,
00133 const std::string & left, const std::string & right);
00134
00150 template <class Iterator>
00151 Query(Query::op op_, Iterator qbegin, Iterator qend,
00152 Xapian::termcount parameter = 0);
00153
00155 Query(Query::op op_, Xapian::Query q);
00156
00158 Query(Query::op op_, Xapian::valueno valno,
00159 const std::string &begin, const std::string &end);
00160
00162 static Xapian::Query MatchAll;
00163
00165 static Xapian::Query MatchNothing;
00166
00171 Xapian::termcount get_length() const;
00172
00178 TermIterator get_terms_begin() const;
00179
00183 TermIterator get_terms_end() const {
00184 return TermIterator(NULL);
00185 }
00186
00190 bool empty() const;
00191
00195 std::string get_description() const;
00196
00197 private:
00198 void add_subquery(const Query & subq);
00199 void add_subquery(const Query * subq);
00200 void add_subquery(const std::string & tname);
00201 void start_construction(Query::op op_, Xapian::termcount parameter);
00202 void end_construction();
00203 void abort_construction();
00204 };
00205
00206 template <class Iterator>
00207 Query::Query(Query::op op_, Iterator qbegin, Iterator qend, termcount parameter)
00208 : internal(0)
00209 {
00210 try {
00211 start_construction(op_, parameter);
00212
00213
00214 while (qbegin != qend) {
00215 add_subquery(*qbegin);
00216 ++qbegin;
00217 }
00218
00219 end_construction();
00220 } catch (...) {
00221 abort_construction();
00222 throw;
00223 }
00224 }
00225
00227 class XAPIAN_VISIBILITY_DEFAULT Query::Internal : public Xapian::Internal::RefCntBase {
00228 friend class ::MultiMatch;
00229 friend class ::LocalSubMatch;
00230 friend struct ::SortPosName;
00231 public:
00232 static const int OP_LEAF = -1;
00233
00235 typedef std::vector<Internal *> subquery_list;
00236
00238 typedef int op_t;
00239
00240 private:
00242 op_t op;
00243
00245 subquery_list subqs;
00246
00254 Xapian::termcount parameter;
00255
00261 std::string tname;
00262
00264 std::string str_parameter;
00265
00267 Xapian::termpos term_pos;
00268
00270 Xapian::termcount wqf;
00271
00279 void swap(Query::Internal &other);
00280
00282 void initialise_from_copy(const Query::Internal & copyme);
00283
00284 void accumulate_terms(
00285 std::vector<std::pair<std::string, Xapian::termpos> > &terms) const;
00286
00291 Internal * simplify_query();
00292
00298 void validate_query() const;
00299
00305 bool simplify_matchnothing();
00306
00309 static std::string get_op_name(Xapian::Query::Internal::op_t op);
00310
00313 void collapse_subqs();
00314
00318 void flatten_subqs();
00319
00322 std::string serialise(Xapian::termpos & curpos) const;
00323
00324 public:
00326 Internal(const Query::Internal & copyme);
00327
00329 void operator=(const Query::Internal & copyme);
00330
00332 explicit Internal(const std::string & tname_, Xapian::termcount wqf_ = 1,
00333 Xapian::termpos term_pos_ = 0);
00334
00336 Internal(op_t op_, Xapian::termcount parameter);
00337
00339 Internal(op_t op_, Xapian::valueno valno,
00340 const std::string &begin, const std::string &end);
00341
00343 ~Internal();
00344
00345 static Xapian::Query::Internal * unserialise(const std::string &s);
00346
00349 void add_subquery(const Query::Internal * subq);
00350
00353 Query::Internal * end_construction();
00354
00358 std::string serialise() const {
00359 Xapian::termpos curpos = 1;
00360 return serialise(curpos);
00361 }
00362
00366 std::string get_description() const;
00367
00372 Xapian::termcount get_length() const;
00373
00379 TermIterator get_terms() const;
00380 };
00381
00382 }
00383
00384 #endif