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QxDaoPointer.h
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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_POINTER_H_
    00033 #define _QX_DAO_POINTER_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QtCore/qsharedpointer.h>
    00047 #include <QtCore/qstringlist.h>
    00048
    00049 namespace qx {
    00050 template <class T> QSharedPointer<T> clone_to_qt_shared_ptr(const T & obj);
    00051 } // namespace qx
    00052
    00053 namespace qx {
    00054 namespace dao {
    00055
    00056 namespace detail {
    00057 template <class T> struct QxDao_IsDirty;
    00058 } // namespace detail
    00059
    00125 template <typename T>
    00126 class ptr
    00127 {
    00128
    00129 private:
    00130
    00131    QSharedPointer<T> m_pWork;
    00132    QSharedPointer<T> m_pOriginal;
    00133
    00134 public:
    00135
    00136    ptr()                                                                                                             { ; }
    00137    explicit ptr(T * ptr) : m_pWork(ptr)                                                                              { ; }
    00138    explicit ptr(T * ptr, T * original) : m_pWork(ptr), m_pOriginal(original)                                         { ; }
    00139    ptr(const qx::dao::ptr<T> & other) : m_pWork(other.m_pWork), m_pOriginal(other.m_pOriginal)                       { ; }
    00140    ptr(const QSharedPointer<T> & other) : m_pWork(other)                                                             { ; }
    00141    ptr(const QSharedPointer<T> & other, const QSharedPointer<T> & original) : m_pWork(other), m_pOriginal(original)  { ; }
    00142    ptr(const QWeakPointer<T> & other) : m_pWork(other)                                                               { ; }
    00143    ptr(const QWeakPointer<T> & other, const QWeakPointer<T> & original) : m_pWork(other), m_pOriginal(original)      { ; }
    00144    virtual ~ptr()                                                                                                    { ; }
    00145
    00146    template <typename Deleter> ptr(T * ptr, Deleter deleter) : m_pWork(ptr, deleter)                                       { ; }
    00147    template <typename Deleter> ptr(T * ptr, T * original, Deleter deleter) : m_pWork(ptr, deleter), m_pOriginal(original)  { ; }
    00148
    00149    template <class X> ptr(const qx::dao::ptr<X> & other) : m_pWork(qSharedPointerCast<T>(other.m_pWork)), m_pOriginal(qSharedPointerCast<T>(other.m_pOriginal))                                                { ; }
    00150    template <class X> ptr(const QSharedPointer<X> & other) : m_pWork(qSharedPointerCast<T>(other))                                                                                                             { ; }
    00151    template <class X> ptr(const QSharedPointer<X> & other, const QSharedPointer<T> & original) : m_pWork(qSharedPointerCast<T>(other)), m_pOriginal(qSharedPointerCast<T>(original))                           { ; }
    00152    template <class X> ptr(const QWeakPointer<X> & other) : m_pWork(qSharedPointerCast<T>(other.toStrongRef()))                                                                                                 { ; }
    00153    template <class X> ptr(const QWeakPointer<X> & other, const QWeakPointer<X> & original) : m_pWork(qSharedPointerCast<T>(other.toStrongRef())), m_pOriginal(qSharedPointerCast<T>(original.toStrongRef()))   { ; }
    00154
    00155    qx::dao::ptr<T> & operator=(const qx::dao::ptr<T> & other)     { m_pWork = other.m_pWork; m_pOriginal = other.m_pOriginal; return (* this); }
    00156    qx::dao::ptr<T> & operator=(const QSharedPointer<T> & other)   { m_pWork = other; m_pOriginal.clear(); return (* this); }
    00157    qx::dao::ptr<T> & operator=(const QWeakPointer<T> & other)     { m_pWork = other; m_pOriginal.clear(); return (* this); }
    00158
    00159    template <class X> qx::dao::ptr<T> & operator=(const qx::dao::ptr<X> & other)    { m_pWork = qSharedPointerCast<T>(other.m_pWork); m_pOriginal = qSharedPointerCast<T>(other.m_pOriginal); return (* this); }
    00160    template <class X> qx::dao::ptr<T> & operator=(const QSharedPointer<X> & other)  { m_pWork = qSharedPointerCast<T>(other); m_pOriginal.clear(); return (* this); }
    00161    template <class X> qx::dao::ptr<T> & operator=(const QWeakPointer<X> & other)    { m_pWork = qSharedPointerCast<T>(other.toStrongRef()); m_pOriginal.clear(); return (* this); }
    00162
    00163    inline T * get() const                                      { return m_pWork.data(); }
    00164    inline T * getOriginal() const                              { return m_pOriginal.data(); }
    00165    inline T * data() const                                     { return m_pWork.data(); }
    00166    inline T * dataOriginal() const                             { return m_pOriginal.data(); }
    00167    inline bool isNull() const                                  { return m_pWork.isNull(); }
    00168    inline operator bool() const                                { return (! m_pWork.isNull()); }
    00169    inline bool operator!() const                               { return m_pWork.isNull(); }
    00170    inline T & operator*() const                                { return (* m_pWork.data()); }
    00171    inline T * operator->() const                               { return m_pWork.data(); }
    00172    inline void clear()                                         { m_pWork.clear(); m_pOriginal.clear(); }
    00173    inline void reset()                                         { m_pWork.clear(); m_pOriginal.clear(); }
    00174    inline void reset(const QSharedPointer<T> & ptr)            { m_pWork = ptr; m_pOriginal.clear(); }
    00175    inline void resetOriginal(const QSharedPointer<T> & ptr)    { m_pOriginal = ptr; }
    00176    inline void saveToOriginal()                                { m_pOriginal.clear(); if (m_pWork) { m_pOriginal = qx::clone_to_qt_shared_ptr(* m_pWork); } }
    00177    inline void restoreFromOriginal()                           { m_pWork.clear(); if (m_pOriginal) { m_pWork = qx::clone_to_qt_shared_ptr(* m_pOriginal); } }
    00178    inline bool isDirty() const                                 { QStringList lstDiff; return isDirty(lstDiff); }
    00179    inline QSharedPointer<T> toQtSharedPointer() const          { return m_pWork; }
    00180
    00181    template <class X> qx::dao::ptr<X> staticCast() const       { return qx::dao::ptr<X>(m_pWork.template staticCast<X>(), m_pOriginal.template staticCast<X>()); }
    00182    template <class X> qx::dao::ptr<X> dynamicCast() const      { return qx::dao::ptr<X>(m_pWork.template dynamicCast<X>(), m_pOriginal.template dynamicCast<X>()); }
    00183    template <class X> qx::dao::ptr<X> constCast() const        { return qx::dao::ptr<X>(m_pWork.template constCast<X>(), m_pOriginal.template constCast<X>()); }
    00184
    00185    bool isDirty(QStringList & lstDiff) const
    00186    {
    00187       lstDiff.clear();
    00188       if (m_pWork.isNull() || m_pOriginal.isNull()) { lstDiff.append("*"); return true; }
    00189       if (m_pWork == m_pOriginal) { return false; }
    00190       qx::dao::detail::QxDao_IsDirty<T>::compare((* m_pWork), (* m_pOriginal), lstDiff);
    00191       return (! lstDiff.isEmpty());
    00192    }
    00193
    00194 };
    00195
    00196 } // namespace dao
    00197 } // namespace qx
    00198
    00199 template<class T, class X> bool operator==(const qx::dao::ptr<T> & ptr1, const qx::dao::ptr<X> & ptr2)   { return (ptr1.toQtSharedPointer() == ptr2.toQtSharedPointer()); }
    00200 template<class T, class X> bool operator!=(const qx::dao::ptr<T> & ptr1, const qx::dao::ptr<X> & ptr2)   { return (ptr1.toQtSharedPointer() != ptr2.toQtSharedPointer()); }
    00201 template<class T, class X> bool operator==(const qx::dao::ptr<T> & ptr1, const X * ptr2)                 { return (ptr1.toQtSharedPointer() == ptr2); }
    00202 template<class T, class X> bool operator!=(const qx::dao::ptr<T> & ptr1, const X * ptr2)                 { return (ptr1.toQtSharedPointer() != ptr2); }
    00203 template<class T, class X> bool operator==(const T * ptr1, const qx::dao::ptr<X> & ptr2)                 { return (ptr1 == ptr2.toQtSharedPointer()); }
    00204 template<class T, class X> bool operator!=(const T * ptr1, const qx::dao::ptr<X> & ptr2)                 { return (ptr1 != ptr2.toQtSharedPointer()); }
    00205
    00206 #endif // _QX_DAO_POINTER_H_