Main Page | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Namespace Members | Class Members | File Members

pqxxobject/field_base.h

Go to the documentation of this file.
00001 // database field base class                                     -*- C++ -*-
00002 // $Id: field_base.h,v 1.2 2004/04/01 10:13:09 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 PQXXOBJECT_FIELD_BASE_H
00040 #define PQXXOBJECT_FIELD_BASE_H
00041 
00042 #include <string>
00043 
00044 #include <sigc++/object.h>
00045 #include <sigc++/signal.h>
00046 
00047 namespace pqxxobject
00048 {
00068   class field_base : public SigC::Object
00069   {
00070   public:
00072     field_base();
00073 
00079     field_base(const std::string& column_name);
00080 
00082     field_base(const field_base& rhs);
00083 
00085     virtual ~field_base();
00086 
00093     field_base& operator = (const field_base& rhs);
00094 
00099     const std::string& get_column_name() const;
00100 
00105     void set_column_name(const std::string& column);
00106 
00111     virtual bool is_null() const = 0;
00112 
00117     virtual bool is_not_null() const = 0;
00118 
00133     SigC::Signal0<void>& signal_changed();
00134 
00135   protected:
00137     std::string m_column_name;
00138 
00140     SigC::Signal0<void> m_signal_changed;
00141 
00142   }; // class field_base
00143 
00144 
00145 }; // namespace pqxxobject
00146 
00147 #endif // PQXXOBJECT_FIELD_BASE_H

Generated on Sat May 22 18:33:57 2004 for pqxxobject API Reference by doxygen 1.3.6-20040222