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construct_ptr.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://www.qxorm.com/
    00004 ** http://sourceforge.net/projects/qxorm/
    00005 ** Original file by Lionel Marty
    00006 **
    00007 ** This file is part of the QxOrm library
    00008 **
    00009 ** This software is provided 'as-is', without any express or implied
    00010 ** warranty. In no event will the authors be held liable for any
    00011 ** damages arising from the use of this software.
    00012 **
    00013 ** GNU Lesser General Public License Usage
    00014 ** This file must be used under the terms of the GNU Lesser
    00015 ** General Public License version 2.1 as published by the Free Software
    00016 ** Foundation and appearing in the file 'license.lgpl.txt' included in the
    00017 ** packaging of this file.  Please review the following information to
    00018 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00019 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00020 **
    00021 ** If you have questions regarding the use of this file, please contact :
    00022 ** contact@qxorm.com
    00023 **
    00024 ****************************************************************************/
    00025
    00026 #ifndef _QX_CONSTRUCT_PTR_H_
    00027 #define _QX_CONSTRUCT_PTR_H_
    00028
    00029 #ifdef _MSC_VER
    00030 #pragma once
    00031 #endif
    00032
    00040 #include <boost/scoped_ptr.hpp>
    00041 #include <boost/shared_ptr.hpp>
    00042 #include <boost/intrusive_ptr.hpp>
    00043 #include <boost/type_traits/is_abstract.hpp>
    00044 #include <boost/type_traits/remove_pointer.hpp>
    00045
    00046 #include <QtCore/qsharedpointer.h>
    00047
    00048 #if (QT_VERSION >= 0x040600)
    00049 #include <QtCore/qscopedpointer.h>
    00050 #endif // (QT_VERSION >= 0x040600)
    00051
    00052 #include <QxDao/QxDaoPointer.h>
    00053
    00054 namespace qx {
    00055 namespace trait {
    00056
    00061 template <typename T>
    00062 struct construct_ptr
    00063 {
    00064
    00065 private:
    00066
    00067    typedef typename boost::remove_pointer<T>::type type_ptr;
    00068
    00069 public:
    00070
    00071    static inline void get(T & t)
    00072    { new_ptr<boost::is_abstract<type_ptr>::value, 0>::get(t); }
    00073
    00074 private:
    00075
    00076    template <bool isAbstract /* = false */, int dummy>
    00077    struct new_ptr
    00078    { static inline void get(T & t) { t = new type_ptr(); } };
    00079
    00080    template <int dummy>
    00081    struct new_ptr<true, dummy>
    00082    { static inline void get(T & t) { Q_UNUSED(t); qDebug("[QxOrm] qx::trait::construct_ptr<T> : %s", "cannot instantiate abstract class"); } };
    00083
    00084 };
    00085
    00086 template <typename T>
    00087 struct construct_ptr< boost::scoped_ptr<T> >
    00088 { static inline void get(boost::scoped_ptr<T> & t) { t.reset(new T()); } };
    00089
    00090 template <typename T>
    00091 struct construct_ptr< boost::shared_ptr<T> >
    00092 { static inline void get(boost::shared_ptr<T> & t) { t.reset(new T()); } };
    00093
    00094 template <typename T>
    00095 struct construct_ptr< boost::intrusive_ptr<T> >
    00096 { static inline void get(boost::intrusive_ptr<T> & t) { t.reset(new T()); } };
    00097
    00098 template <typename T>
    00099 struct construct_ptr< QSharedPointer<T> >
    00100 { static inline void get(QSharedPointer<T> & t) { t = QSharedPointer<T>(new T()); } };
    00101
    00102 #if (QT_VERSION >= 0x040600)
    00103 template <typename T>
    00104 struct construct_ptr< QScopedPointer<T> >
    00105 { static inline void get(QScopedPointer<T> & t) { t = QScopedPointer<T>(new T()); } };
    00106 #endif // (QT_VERSION >= 0x040600)
    00107
    00108 template <typename T>
    00109 struct construct_ptr< qx::dao::ptr<T> >
    00110 { static inline void get(qx::dao::ptr<T> & t) { t = qx::dao::ptr<T>(new T()); } };
    00111
    00112 } // namespace trait
    00113 } // namespace qx
    00114
    00115 #endif // _QX_CONSTRUCT_PTR_H_