00001 // database table convenience wrapper -*- C++ -*- 00002 // $Id: table.h,v 1.8 2004/02/20 22:49:15 roger Exp $ 00003 // 00004 // Copyright (C) 2003 Roger Leigh <rleigh@debian.org> 00005 // 00006 // 00007 // All rights reserved. 00008 // 00009 // Redistribution and use in source and binary forms, with or without 00010 // modification, are permitted provided that the following conditions 00011 // are met: 00012 // 00013 // * Redistributions of source code must retain the above copyright 00014 // notice, this list of conditions and the following disclaimer. 00015 // * Redistributions in binary form must reproduce the above 00016 // copyright notice, this list of conditions and the following 00017 // disclaimer in the documentation and/or other materials provided 00018 // with the distribution. 00019 // * Neither the name of the author, nor the names of other 00020 // contributors may be used to endorse or promote products derived 00021 // from this software without specific prior written permission. 00022 // 00023 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 00024 // CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 00025 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00026 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00027 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 00028 // BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00029 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00030 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00031 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 00032 // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 00033 // TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00034 // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00035 // SUCH DAMAGE. 00036 // 00038 00039 #ifndef PQXX_OBJECT_TABLE_H 00040 #define PQXX_OBJECT_TABLE_H 00041 00042 #include <list> 00043 #include <memory> 00044 00045 #include <pqxx-object/row.h> 00046 00047 namespace pqxxobject 00048 { 00056 template<typename Row> 00057 class table 00058 { 00059 public: 00061 typedef Row row_type; 00063 typedef typename Row::row_ptr row_ptr; 00065 typedef std::list<Row> row_list; 00067 typedef std::auto_ptr<row_list> row_list_ptr; 00068 00069 00070 protected: 00079 explicit table(pqxxobject::transaction& tran): 00080 m_transaction(tran) 00081 {} 00082 00083 public: 00085 virtual ~table() 00086 {} 00087 00092 virtual 00093 void 00094 insert(row_type& row) 00095 { 00096 row.insert(m_transaction); 00097 } 00098 00103 virtual 00104 void 00105 update(row_type& row) 00106 { 00107 row.update(m_transaction); 00108 } 00109 00114 virtual 00115 void 00116 erase(row_type& row) 00117 { 00118 row.erase(m_transaction); 00119 } 00120 00125 virtual 00126 void 00127 refresh(row_type& row) 00128 { 00129 row.refresh(m_transaction); 00130 } 00131 00132 protected: 00138 virtual 00139 row_ptr 00140 find_one(const std::string& query) 00141 { 00142 try 00143 { 00144 m_transaction.begin("pqxxobject::table::find_one"); 00145 00146 pqxx::result R (m_transaction.exec(query)); 00147 00148 00149 row_ptr ret; 00150 00151 if (R.size() > 0) 00152 { 00153 pqxx::result::const_iterator cur = R.begin(); 00154 // Assign result (if any) to temporary row. 00155 if (cur != R.end()) 00156 ret = row_type::create(cur, m_transaction); 00157 } 00158 00159 m_transaction.commit(); 00160 return ret; 00161 } 00162 catch (const std::exception& e) 00163 { 00164 m_transaction.abort(); 00165 throw DatabaseError(e.what()); 00166 } 00167 } 00168 00174 virtual 00175 row_list_ptr 00176 find_many(const std::string& query) 00177 { 00178 try 00179 { 00180 m_transaction.begin("pqxxobject::table::find_many"); 00181 00182 pqxx::result R (m_transaction.exec(query)); 00183 00184 row_list_ptr ret(new row_list); 00185 00186 for (pqxx::result::const_iterator cur = R.begin(); cur != R.end(); cur++) 00187 { 00188 row_ptr tmp_row; 00189 // Assign results (one row) to temporary row 00190 tmp_row = row_type::create(cur, m_transaction); 00191 // Add this member to the list 00192 ret->push_back(*tmp_row); 00193 } 00194 00195 m_transaction.commit(); 00196 00197 return ret; 00198 } 00199 catch (const std::exception& e) 00200 { 00201 m_transaction.abort(); 00202 throw DatabaseError(e.what()); 00203 } 00204 } 00205 00206 pqxxobject::transaction& m_transaction; 00207 00208 }; // class table 00209 00210 }; // namespace pqxxobject 00211 00212 #endif // PQXX_OBJECT_TABLE_H