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# noexceptions.h

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    00015 /***********************************************************************
    00016  Copyright (c) 2005 by Educational Technology Resources, Inc.
    00017  Others may also hold copyrights on code in this file.  See the CREDITS
    00018  file in the top directory of the distribution for details.
    00019
    00020  This file is part of MySQL++.
    00021
    00022  MySQL++ is free software; you can redistribute it and/or modify it
    00023  under the terms of the GNU Lesser General Public License as published
    00024  by the Free Software Foundation; either version 2.1 of the License, or
    00025  (at your option) any later version.
    00026
    00027  MySQL++ is distributed in the hope that it will be useful, but WITHOUT
    00028  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    00029  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
    00030  License for more details.
    00031
    00032  You should have received a copy of the GNU Lesser General Public
    00033  License along with MySQL++; if not, write to the Free Software
    00034  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
    00035  USA
    00036 ***********************************************************************/
    00037
    00038 #ifndef MYSQLPP_NOEXCEPTIONS_H
    00039 #define MYSQLPP_NOEXCEPTIONS_H
    00040
    00041 namespace mysqlpp {
    00042
    00043 #if !defined(DOXYGEN_IGNORE)
    00044 // Make Doxygen ignore this
    00045 class MYSQLPP_EXPORT NoExceptions;
    00046 #endif
    00047
    00053
    00054 class MYSQLPP_EXPORT OptionalExceptions
    00055 {
    00056 public:
    00060         OptionalExceptions(bool e = true) :
    00061         exceptions_(e)
    00062         {
    00063         }
    00064
    00066         virtual ~OptionalExceptions() { }
    00067
    00069         void enable_exceptions() { exceptions_ = true; }
    00070
    00072         void disable_exceptions() { exceptions_ = false; }
    00073
    00075         bool throw_exceptions() const { return exceptions_; }
    00076
    00077 protected:
    00082         void set_exceptions(bool e) { exceptions_ = e; }
    00083
    00086         friend class NoExceptions;
    00087
    00088 private:
    00089         bool exceptions_;
    00090 };
    00091
    00092
    00101
    00102 class MYSQLPP_EXPORT NoExceptions
    00103 {
    00104 public:
    00110         NoExceptions(OptionalExceptions& a) :
    00111         assoc_(a),
    00112         exceptions_were_enabled_(a.throw_exceptions())
    00113         {
    00114                 assoc_.disable_exceptions();
    00115         }
    00116
    00120         ~NoExceptions()
    00121         {
    00122                 assoc_.set_exceptions(exceptions_were_enabled_);
    00123         }
    00124
    00125 private:
    00126         OptionalExceptions& assoc_;
    00127         bool exceptions_were_enabled_;
    00128
    00129         // Hidden assignment operator and copy ctor, because we should not
    00130         // be copied.
    00131         NoExceptions(const NoExceptions&);
    00132         NoExceptions& operator=(const NoExceptions&);
    00133 };
    00134
    00135 } // end namespace mysqlpp
    00136
    00137 #endif // MYSQLPP_NOEXCEPTIONS_H
    00138