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QxOrm
1.4.2
C++ Object Relational Mapping library
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00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com) 00005 ** 00006 ** This file is part of the QxOrm library 00007 ** 00008 ** This software is provided 'as-is', without any express or implied 00009 ** warranty. In no event will the authors be held liable for any 00010 ** damages arising from the use of this software 00011 ** 00012 ** Commercial Usage 00013 ** Licensees holding valid commercial QxOrm licenses may use this file in 00014 ** accordance with the commercial license agreement provided with the 00015 ** Software or, alternatively, in accordance with the terms contained in 00016 ** a written agreement between you and Lionel Marty 00017 ** 00018 ** GNU General Public License Usage 00019 ** Alternatively, this file may be used under the terms of the GNU 00020 ** General Public License version 3.0 as published by the Free Software 00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the 00022 ** packaging of this file. Please review the following information to 00023 ** ensure the GNU General Public License version 3.0 requirements will be 00024 ** met : http://www.gnu.org/copyleft/gpl.html 00025 ** 00026 ** If you are unsure which license is appropriate for your use, or 00027 ** if you have questions regarding the use of this file, please contact : 00028 ** contact@qxorm.com 00029 ** 00030 ****************************************************************************/ 00031 00032 #ifndef _QX_DAO_IS_DIRTY_H_ 00033 #define _QX_DAO_IS_DIRTY_H_ 00034 00035 #ifdef _MSC_VER 00036 #pragma once 00037 #endif 00038 00039 #include <boost/static_assert.hpp> 00040 #include <boost/mpl/if.hpp> 00041 #include <boost/mpl/logical.hpp> 00042 #include <boost/type_traits/is_pointer.hpp> 00043 00044 #include <QtCore/qstringlist.h> 00045 00046 #include <QxDao/QxSqlQueryBuilder.h> 00047 #include <QxDao/IxSqlRelation.h> 00048 00049 #include <QxTraits/is_qx_registered.h> 00050 #include <QxTraits/is_container.h> 00051 #include <QxTraits/is_smart_ptr.h> 00052 #include <QxTraits/generic_container.h> 00053 00054 namespace qx { 00055 namespace dao { 00056 namespace detail { 00057 00058 template <class T> 00059 inline void is_dirty(const T & obj1, const T & obj2, QStringList & lstDiff); 00060 00061 template <class T> 00062 struct QxDao_IsDirty_Generic 00063 { 00064 00065 static void compare(const T & obj1, const T & obj2, QStringList & lstDiff) 00066 { 00067 BOOST_STATIC_ASSERT(qx::trait::is_qx_registered<T>::value); 00068 00069 qx::QxSqlQueryBuilder<T> builder; builder.init(); 00070 qx::IxDataMember * pId = builder.getDataId(); 00071 if (pId && (! pId->isEqual((& obj1), (& obj2)))) { lstDiff.append(pId->getKey()); } 00072 00073 long l = 0; 00074 qx::IxDataMember * p = NULL; 00075 while ((p = builder.nextData(l))) 00076 { if (p && (! p->isEqual((& obj1), (& obj2)))) { lstDiff.append(p->getKey()); } } 00077 } 00078 00079 }; 00080 00081 template <class T> 00082 struct QxDao_IsDirty_Container 00083 { 00084 00085 static void compare(const T & obj1, const T & obj2, QStringList & lstDiff) 00086 { 00087 if (qx::trait::generic_container<T>::size(obj1) <= 0) { return; } 00088 if (qx::trait::generic_container<T>::size(obj1) != qx::trait::generic_container<T>::size(obj2)) { lstDiff.append("*"); return; } 00089 00090 long lCurrIndex = 0; 00091 typename T::const_iterator it2 = obj2.begin(); 00092 00093 for (typename T::const_iterator it1 = obj1.begin(); it1 != obj1.end(); ++it1) 00094 { 00095 QStringList lstDiffItem; 00096 qx::dao::detail::is_dirty((* it1), (* it2), lstDiffItem); 00097 if (lstDiffItem.count() > 0) { lstDiff.append(QString::number(lCurrIndex) + "|" + lstDiffItem.join("|")); } 00098 ++lCurrIndex; ++it2; 00099 } 00100 } 00101 00102 }; 00103 00104 template <class T> 00105 struct QxDao_IsDirty_Ptr 00106 { 00107 00108 static void compare(const T & obj1, const T & obj2, QStringList & lstDiff) 00109 { qx::dao::detail::is_dirty((* obj1), (* obj2), lstDiff); } 00110 00111 }; 00112 00113 template <class T> 00114 struct QxDao_IsDirty 00115 { 00116 00117 static void compare(const T & obj1, const T & obj2, QStringList & lstDiff) 00118 { 00119 typedef typename boost::mpl::if_c< boost::is_pointer<T>::value, qx::dao::detail::QxDao_IsDirty_Ptr<T>, qx::dao::detail::QxDao_IsDirty_Generic<T> >::type type_dao_1; 00120 typedef typename boost::mpl::if_c< qx::trait::is_smart_ptr<T>::value, qx::dao::detail::QxDao_IsDirty_Ptr<T>, type_dao_1 >::type type_dao_2; 00121 typedef typename boost::mpl::if_c< qx::trait::is_container<T>::value, qx::dao::detail::QxDao_IsDirty_Container<T>, type_dao_2 >::type type_dao_3; 00122 type_dao_3::compare(obj1, obj2, lstDiff); 00123 } 00124 00125 }; 00126 00127 template <class T> 00128 inline void is_dirty(const T & obj1, const T & obj2, QStringList & lstDiff) 00129 { return qx::dao::detail::QxDao_IsDirty<T>::compare(obj1, obj2, lstDiff); } 00130 00131 } // namespace detail 00132 } // namespace dao 00133 } // namespace qx 00134 00135 #endif // _QX_DAO_IS_DIRTY_H_