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pqxx-object/row_base.h

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00001 // database row base class                                       -*- C++ -*-
00002 // $Id: row_base.h,v 1.5 2004/01/28 21:21:08 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_ROW_BASE_H
00040 #define PQXX_OBJECT_ROW_BASE_H
00041 
00042 #include <sigc++/object.h>
00043 #include <sigc++/signal.h>
00044 #include <sigc++/object_slot.h>
00045 
00046 #include <pqxx-object/transaction.h>
00047 
00048 namespace pqxxobject
00049 {
00056   class row_base : public SigC::Object
00057   {
00058   public:
00060     enum row_state
00061       {
00066         STATE_UNINITIALISED,
00068         STATE_INITIALISED,
00073         STATE_INCONSISTENT
00074       };
00075 
00077     row_base();
00078 
00084     row_base(row_state status,
00085              bool modified=false);
00086 
00090     row_base(const row_base& rhs);
00091 
00093     virtual ~row_base();
00094 
00095 
00100     row_base& operator = (const row_base& rhs);
00101 
00106     row_state get_state() const;
00107 
00112     bool is_modified() const;
00113 
00118     void refresh(pqxxobject::transaction& tran);
00119 
00124     void insert(pqxxobject::transaction& tran);
00125 
00130     void update(pqxxobject::transaction& tran);
00131 
00136     void erase(pqxxobject::transaction& tran);
00137 
00142     SigC::Signal0<void>& signal_changed();
00143 
00148     SigC::Signal0<void>& signal_refreshed();
00149 
00154     SigC::Signal0<void>& signal_inserted();
00155 
00160     SigC::Signal0<void>& signal_updated();
00161 
00166     SigC::Signal0<void>& signal_erased();
00167 
00168   protected:
00175     virtual void refresh_impl(pqxxobject::transaction& tran);
00176 
00183     virtual void insert_impl(pqxxobject::transaction& tran);
00184 
00191     virtual void update_impl(pqxxobject::transaction& tran);
00192 
00199     virtual void erase_impl(pqxxobject::transaction& tran);
00200 
00202     row_state m_state;
00204     bool m_modified;
00205 
00207     SigC::Signal0<void> m_signal_changed;
00209     SigC::Signal0<void> m_signal_refreshed;
00211     SigC::Signal0<void> m_signal_inserted;
00213     SigC::Signal0<void> m_signal_updated;
00215     SigC::Signal0<void> m_signal_erased;
00216 
00217   }; // class row_base
00218 
00219 }; // namespace pqxxobject
00220 
00221 #endif // PQXX_OBJECT_ROW_BASE_H

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