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# result.h

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    00001
    00002
    00003
    00004
    00005 /***********************************************************************
    00006  Copyright (c) 1998 by Kevin Atkinson, (c) 1999-2001 by MySQL AB, and
    00007  (c) 2004-2007 by Educational Technology Resources, Inc.  Others may
    00008  also hold copyrights on code in this file.  See the CREDITS.txt file
    00009  in the top directory of the distribution for details.
    00010
    00011  This file is part of MySQL++.
    00012
    00013  MySQL++ is free software; you can redistribute it and/or modify it
    00014  under the terms of the GNU Lesser General Public License as published
    00015  by the Free Software Foundation; either version 2.1 of the License, or
    00016  (at your option) any later version.
    00017
    00018  MySQL++ is distributed in the hope that it will be useful, but WITHOUT
    00019  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    00020  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
    00021  License for more details.
    00022
    00023  You should have received a copy of the GNU Lesser General Public
    00024  License along with MySQL++; if not, write to the Free Software
    00025  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
    00026  USA
    00027 ***********************************************************************/
    00028
    00029 #if !defined(MYSQLPP_RESULT_H)
    00030 #define MYSQLPP_RESULT_H
    00031
    00032 #include "common.h"
    00033
    00034 #include "exceptions.h"
    00035 #include "field.h"
    00036 #include "field_names.h"
    00037 #include "field_types.h"
    00038 #include "noexceptions.h"
    00039 #include "refcounted.h"
    00040 #include "row.h"
    00041
    00042 namespace mysqlpp {
    00043
    00044
    00047
    00048 class MYSQLPP_EXPORT SimpleResult
    00049 {
    00050 private:
    00055         typedef bool SimpleResult::*private_bool_type;
    00056
    00057 public:
    00059         SimpleResult() :
    00060         copacetic_(false),
    00061         insert_id_(0),
    00062         rows_(0)
    00063         {
    00064         }
    00065
    00067         SimpleResult(bool copacetic, ulonglong insert_id,
    00068                         ulonglong rows, const std::string& info) :
    00069         copacetic_(copacetic),
    00070         insert_id_(insert_id),
    00071         rows_(rows),
    00072         info_(info)
    00073         {
    00074         }
    00075
    00082         operator private_bool_type() const
    00083         {
    00084                 return copacetic_ ? &SimpleResult::copacetic_ : 0;
    00085         }
    00086
    00088         ulonglong insert_id() const { return insert_id_; }
    00089
    00091         ulonglong rows() const { return rows_; }
    00092
    00095         const char* info() const { return info_.c_str(); }
    00096
    00097 private:
    00098         bool copacetic_;
    00099         ulonglong insert_id_;
    00100         ulonglong rows_;
    00101         std::string info_;
    00102 };
    00103
    00104
    00109
    00110 class MYSQLPP_EXPORT ResultBase : public OptionalExceptions
    00111 {
    00112 public:
    00114         virtual ~ResultBase() { }
    00115
    00117         const Field& fetch_field() const
    00118                         { return fields_.at(current_field_++); }
    00119
    00121         const Field& fetch_field(Fields::size_type i) const
    00122                         { return fields_.at(i); }
    00123
    00125         const Field& field(unsigned int i) const { return fields_.at(i); }
    00126
    00128         const Fields& fields() const { return fields_; }
    00129
    00131         const std::string& field_name(int i) const
    00132                         { return names_->at(i); }
    00133
    00135         const RefCountedPointer<FieldNames>& field_names() const
    00136                         { return names_; }
    00137
    00141         int field_num(const std::string&) const;
    00142
    00144         const FieldTypes::value_type& field_type(int i) const
    00145                         { return types_->at(i); }
    00146
    00149         const RefCountedPointer<FieldTypes>& field_types() const
    00150                         { return types_; }
    00151
    00153         size_t num_fields() const { return fields_.size(); }
    00154
    00156         const char* table() const
    00157                         { return fields_.empty() ? "" : fields_[0].table(); }
    00158
    00159 protected:
    00161         ResultBase() :
    00162         driver_(0),
    00163         current_field_(0)
    00164         {
    00165         }
    00166
    00168         ResultBase(MYSQL_RES* result, DBDriver* dbd, bool te = true);
    00169
    00171         ResultBase(const ResultBase& other) :
    00172         OptionalExceptions()
    00173         {
    00174                 copy(other);
    00175         }
    00176
    00178         ResultBase& copy(const ResultBase& other);
    00179
    00180         DBDriver* driver_;
    00181         Fields fields_;
    00182
    00184         RefCountedPointer<FieldNames> names_;
    00185
    00187         RefCountedPointer<FieldTypes> types_;
    00188
    00196         mutable Fields::size_type current_field_;
    00197 };
    00198
    00199
    00208
    00209 class MYSQLPP_EXPORT StoreQueryResult :
    00210                 public ResultBase,
    00211                 public std::vector<Row>
    00212 {
    00213 private:
    00218         typedef bool StoreQueryResult::*private_bool_type;
    00219
    00220 public:
    00221         typedef std::vector<Row> list_type;
    00222
    00224         StoreQueryResult() :
    00225         ResultBase(),
    00226         copacetic_(false)
    00227         {
    00228         }
    00229
    00231         StoreQueryResult(MYSQL_RES* result, DBDriver* dbd, bool te = true);
    00232
    00235         StoreQueryResult(const StoreQueryResult& other) :
    00236         ResultBase(),
    00237         std::vector<Row>(),
    00238         copacetic_(false)
    00239         {
    00240                 copy(other);
    00241         }
    00242
    00244         ~StoreQueryResult() { }
    00245
    00247         list_type::size_type num_rows() const { return size(); }
    00248
    00251         StoreQueryResult& operator =(const StoreQueryResult& rhs)
    00252                         { return this != &rhs ? copy(rhs) : *this; }
    00253
    00260         operator private_bool_type() const
    00261         {
    00262                 return copacetic_ ? &StoreQueryResult::copacetic_ : 0;
    00263         }
    00264
    00265 private:
    00268         StoreQueryResult& copy(const StoreQueryResult& other);
    00269
    00270         bool copacetic_;
    00271 };
    00272
    00273
    00280 template <>
    00281 struct RefCountedPointerDestroyer<MYSQL_RES>
    00282 {
    00284         void operator()(MYSQL_RES* doomed) const
    00285         {
    00286                 if (doomed) {
    00287                         mysql_free_result(doomed);
    00288                 }
    00289         }
    00290 };
    00291
    00292
    00297
    00298 class MYSQLPP_EXPORT UseQueryResult : public ResultBase
    00299 {
    00300 public:
    00302         UseQueryResult() :
    00303         ResultBase()
    00304         {
    00305         }
    00306
    00308         UseQueryResult(MYSQL_RES* result, DBDriver* dbd, bool te = true);
    00309
    00311         UseQueryResult(const UseQueryResult& other) :
    00312         ResultBase()
    00313         {
    00314                 copy(other);
    00315         }
    00316
    00318         ~UseQueryResult() { }
    00319
    00321         UseQueryResult& operator =(const UseQueryResult& rhs)
    00322                         { return this != &rhs ? copy(rhs) : *this; }
    00323
    00325         const Field& fetch_field() const
    00326                         { return fields_.at(current_field_++); }
    00327
    00329         const Field& fetch_field(Fields::size_type i) const
    00330                         { return fields_.at(i); }
    00331
    00337         const unsigned long* fetch_lengths() const;
    00338
    00346         Row fetch_row() const;
    00347
    00354         MYSQL_ROW fetch_raw_row() const;
    00355
    00360         void field_seek(Fields::size_type field) const
    00361                         { current_field_ = field; }
    00362
    00374         // it was successful:
    00385         operator MYSQL_RES*() const { return result_.raw(); }
    00386
    00387 private:
    00389         UseQueryResult& copy(const UseQueryResult& other);
    00390
    00401         mutable RefCountedPointer<MYSQL_RES> result_;
    00402 };
    00403
    00404
    00406 inline void
    00407 swap(StoreQueryResult& x, StoreQueryResult& y)
    00408 {
    00409         StoreQueryResult tmp = x;
    00410         x = y;
    00411         y = tmp;
    00412 }
    00413
    00415 inline void
    00416 swap(UseQueryResult& x, UseQueryResult& y)
    00417 {
    00418         UseQueryResult tmp = x;
    00419         x = y;
    00420         y = tmp;
    00421 }
    00422
    00423 } // end namespace mysqlpp
    00424
    00425 #endif // !defined(MYSQLPP_RESULT_H)