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QxDaoPointer.h
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    00001 /****************************************************************************
    00002 **
    00003 ** https://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 #include <QtCore/qdatastream.h>
    00049
    00050 #include <QxSerialize/QDataStream/QxSerializeQDataStream_QSharedPointer.h>
    00051
    00052 namespace qx {
    00053 template <class T> QSharedPointer<T> clone_to_qt_shared_ptr(const T & obj);
    00054 } // namespace qx
    00055
    00056 namespace qx {
    00057 namespace dao {
    00058 template <typename T> class ptr;
    00059 } // namespace dao
    00060 } // namespace qx
    00061
    00062 template <typename T> QDataStream & operator<< (QDataStream & stream, const qx::dao::ptr<T> & t);
    00063 template <typename T> QDataStream & operator>> (QDataStream & stream, qx::dao::ptr<T> & t);
    00064
    00065 namespace qx {
    00066 namespace dao {
    00067
    00068 namespace detail {
    00069 template <class T> struct QxDao_IsDirty;
    00070 } // namespace detail
    00071
    00137 template <typename T>
    00138 class ptr
    00139 {
    00140
    00141    template <class U> friend QDataStream & ::operator<< (QDataStream & stream, const qx::dao::ptr<U> & t);
    00142    template <class U> friend QDataStream & ::operator>> (QDataStream & stream, qx::dao::ptr<U> & t);
    00143
    00144 private:
    00145
    00146    QSharedPointer<T> m_pWork;
    00147    QSharedPointer<T> m_pOriginal;
    00148
    00149 public:
    00150
    00151    ptr()                                                                                                             { ; }
    00152    explicit ptr(T * ptr) : m_pWork(ptr)                                                                              { ; }
    00153    explicit ptr(T * ptr, T * original) : m_pWork(ptr), m_pOriginal(original)                                         { ; }
    00154    ptr(const qx::dao::ptr<T> & other) : m_pWork(other.m_pWork), m_pOriginal(other.m_pOriginal)                       { ; }
    00155    ptr(const QSharedPointer<T> & other) : m_pWork(other)                                                             { ; }
    00156    ptr(const QSharedPointer<T> & other, const QSharedPointer<T> & original) : m_pWork(other), m_pOriginal(original)  { ; }
    00157    ptr(const QWeakPointer<T> & other) : m_pWork(other)                                                               { ; }
    00158    ptr(const QWeakPointer<T> & other, const QWeakPointer<T> & original) : m_pWork(other), m_pOriginal(original)      { ; }
    00159    virtual ~ptr()                                                                                                    { ; }
    00160
    00161    template <typename Deleter> ptr(T * ptr, Deleter deleter) : m_pWork(ptr, deleter)                                       { ; }
    00162    template <typename Deleter> ptr(T * ptr, T * original, Deleter deleter) : m_pWork(ptr, deleter), m_pOriginal(original)  { ; }
    00163
    00164    template <class X> ptr(const qx::dao::ptr<X> & other) : m_pWork(qSharedPointerCast<T>(other.m_pWork)), m_pOriginal(qSharedPointerCast<T>(other.m_pOriginal))                                                { ; }
    00165    template <class X> ptr(const QSharedPointer<X> & other) : m_pWork(qSharedPointerCast<T>(other))                                                                                                             { ; }
    00166    template <class X> ptr(const QSharedPointer<X> & other, const QSharedPointer<T> & original) : m_pWork(qSharedPointerCast<T>(other)), m_pOriginal(qSharedPointerCast<T>(original))                           { ; }
    00167    template <class X> ptr(const QWeakPointer<X> & other) : m_pWork(qSharedPointerCast<T>(other.toStrongRef()))                                                                                                 { ; }
    00168    template <class X> ptr(const QWeakPointer<X> & other, const QWeakPointer<X> & original) : m_pWork(qSharedPointerCast<T>(other.toStrongRef())), m_pOriginal(qSharedPointerCast<T>(original.toStrongRef()))   { ; }
    00169
    00170    qx::dao::ptr<T> & operator=(const qx::dao::ptr<T> & other)     { m_pWork = other.m_pWork; m_pOriginal = other.m_pOriginal; return (* this); }
    00171    qx::dao::ptr<T> & operator=(const QSharedPointer<T> & other)   { m_pWork = other; m_pOriginal.clear(); return (* this); }
    00172    qx::dao::ptr<T> & operator=(const QWeakPointer<T> & other)     { m_pWork = other; m_pOriginal.clear(); return (* this); }
    00173
    00174    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); }
    00175    template <class X> qx::dao::ptr<T> & operator=(const QSharedPointer<X> & other)  { m_pWork = qSharedPointerCast<T>(other); m_pOriginal.clear(); return (* this); }
    00176    template <class X> qx::dao::ptr<T> & operator=(const QWeakPointer<X> & other)    { m_pWork = qSharedPointerCast<T>(other.toStrongRef()); m_pOriginal.clear(); return (* this); }
    00177
    00178    inline T * get() const                                      { return m_pWork.data(); }
    00179    inline T * getOriginal() const                              { return m_pOriginal.data(); }
    00180    inline T * data() const                                     { return m_pWork.data(); }
    00181    inline T * dataOriginal() const                             { return m_pOriginal.data(); }
    00182    inline bool isNull() const                                  { return m_pWork.isNull(); }
    00183    inline operator bool() const                                { return (! m_pWork.isNull()); }
    00184    inline bool operator!() const                               { return m_pWork.isNull(); }
    00185    inline T & operator*() const                                { return (* m_pWork.data()); }
    00186    inline T * operator->() const                               { return m_pWork.data(); }
    00187    inline void clear()                                         { m_pWork.clear(); m_pOriginal.clear(); }
    00188    inline void reset()                                         { m_pWork.clear(); m_pOriginal.clear(); }
    00189    inline void reset(const QSharedPointer<T> & ptr)            { m_pWork = ptr; m_pOriginal.clear(); }
    00190    inline void resetOriginal(const QSharedPointer<T> & ptr)    { m_pOriginal = ptr; }
    00191    inline bool isDirty() const                                 { QStringList lstDiff; return isDirty(lstDiff); }
    00192    inline QSharedPointer<T> toQtSharedPointer() const          { return m_pWork; }
    00193    inline void saveToOriginal()                                { m_pOriginal.clear(); if (m_pWork) { m_pOriginal = qx::clone_to_qt_shared_ptr(* m_pWork); } }
    00194    inline void restoreFromOriginal()                           { m_pWork.clear(); if (m_pOriginal) { m_pWork = qx::clone_to_qt_shared_ptr(* m_pOriginal); } }
    00195
    00196    template <class X> qx::dao::ptr<X> staticCast() const       { return qx::dao::ptr<X>(m_pWork.template staticCast<X>(), m_pOriginal.template staticCast<X>()); }
    00197    template <class X> qx::dao::ptr<X> dynamicCast() const      { return qx::dao::ptr<X>(m_pWork.template dynamicCast<X>(), m_pOriginal.template dynamicCast<X>()); }
    00198    template <class X> qx::dao::ptr<X> constCast() const        { return qx::dao::ptr<X>(m_pWork.template constCast<X>(), m_pOriginal.template constCast<X>()); }
    00199
    00200    bool isDirty(QStringList & lstDiff) const
    00201    {
    00202       lstDiff.clear();
    00203       if (m_pWork.isNull() || m_pOriginal.isNull()) { lstDiff.append("*"); return true; }
    00204       if (m_pWork == m_pOriginal) { return false; }
    00205       qx::dao::detail::QxDao_IsDirty<T>::compare((* m_pWork), (* m_pOriginal), lstDiff);
    00206       return (! lstDiff.isEmpty());
    00207    }
    00208
    00209 };
    00210
    00211 } // namespace dao
    00212 } // namespace qx
    00213
    00214 template<class T, class X> bool operator==(const qx::dao::ptr<T> & ptr1, const qx::dao::ptr<X> & ptr2)   { return (ptr1.toQtSharedPointer() == ptr2.toQtSharedPointer()); }
    00215 template<class T, class X> bool operator!=(const qx::dao::ptr<T> & ptr1, const qx::dao::ptr<X> & ptr2)   { return (ptr1.toQtSharedPointer() != ptr2.toQtSharedPointer()); }
    00216 template<class T, class X> bool operator==(const qx::dao::ptr<T> & ptr1, const X * ptr2)                 { return (ptr1.toQtSharedPointer() == ptr2); }
    00217 template<class T, class X> bool operator!=(const qx::dao::ptr<T> & ptr1, const X * ptr2)                 { return (ptr1.toQtSharedPointer() != ptr2); }
    00218 template<class T, class X> bool operator==(const T * ptr1, const qx::dao::ptr<X> & ptr2)                 { return (ptr1 == ptr2.toQtSharedPointer()); }
    00219 template<class T, class X> bool operator!=(const T * ptr1, const qx::dao::ptr<X> & ptr2)                 { return (ptr1 != ptr2.toQtSharedPointer()); }
    00220
    00221 template <typename T>
    00222 QDataStream & operator<< (QDataStream & stream, const qx::dao::ptr<T> & t)
    00223 {
    00224    stream << t.m_pWork;
    00225    stream << t.m_pOriginal;
    00226    return stream;
    00227 }
    00228
    00229 template <typename T>
    00230 QDataStream & operator>> (QDataStream & stream, qx::dao::ptr<T> & t)
    00231 {
    00232    stream >> t.m_pWork;
    00233    stream >> t.m_pOriginal;
    00234    return stream;
    00235 }
    00236
    00237 #endif // _QX_DAO_POINTER_H_