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QxSqlRelation.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_SQL_RELATION_H_
    00033 #define _QX_SQL_RELATION_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QxDao/QxDao.h>
    00047 #include <QxDao/IxSqlRelation.h>
    00048 #include <QxDao/IxSqlQueryBuilder.h>
    00049
    00050 #include <QxTraits/remove_attr.h>
    00051 #include <QxTraits/remove_smart_ptr.h>
    00052 #include <QxTraits/generic_container.h>
    00053 #include <QxTraits/is_container.h>
    00054 #include <QxTraits/is_valid_primary_key.h>
    00055 #include <QxTraits/is_qx_registered.h>
    00056
    00057 #include <QxRegister/IxClass.h>
    00058
    00059 namespace qx {
    00060
    00061 template <class T>
    00062 class QxClass;
    00063
    00068 template <class DataType, class Owner>
    00069 class QxSqlRelation : public IxSqlRelation
    00070 {
    00071
    00072 protected:
    00073
    00074    typedef typename qx::trait::remove_attr<DataType>::type type_tmp_1;
    00075    typedef typename qx::trait::remove_smart_ptr<type_tmp_1>::type type_tmp_2;
    00076    typedef type_tmp_2 type_container;
    00077    typedef qx::trait::generic_container<type_container> type_generic_container;
    00078    typedef typename type_generic_container::type_item type_item;
    00079    typedef typename std::conditional<qx::trait::is_container<type_container>::value, typename type_generic_container::type_value_qx, type_container>::type type_tmp_3;
    00080    typedef typename QxSqlRelation<DataType, Owner>::type_tmp_3 type_data;
    00081    typedef Owner type_owner;
    00082
    00083    enum { is_valid = (qx::trait::is_qx_registered<type_data>::value && qx::trait::is_qx_registered<type_owner>::value) };
    00084    enum { is_data_pointer = (std::is_pointer<DataType>::value || qx::trait::is_smart_ptr<DataType>::value) };
    00085    enum { is_data_container = qx::trait::is_container<type_container>::value };
    00086    enum { is_same_data_owner = std::is_same<type_data, type_owner>::value };
    00087
    00088 public:
    00089
    00090    QxSqlRelation(IxDataMember * p) : IxSqlRelation(p) { this->setIsSameDataOwner(static_cast<int>(is_same_data_owner)); }
    00091    virtual ~QxSqlRelation() { static_assert(is_valid, "is_valid"); }
    00092
    00093    virtual void init()
    00094    {
    00095       if (! this->canInit()) { return; }
    00096       this->setClass(QxClass<type_data>::getSingleton(), QxClass<type_owner>::getSingleton());
    00097       IxSqlRelation::init();
    00098    }
    00099
    00100 protected:
    00101
    00102    DataType * getDataTypePtr(QxSqlRelationParams & params) const
    00103    { qAssert(params.owner() && this->getDataMember()); return static_cast<DataType *>(this->getDataMember()->getValueVoidPtr(params.owner())); }
    00104
    00105    type_owner & getOwner(QxSqlRelationParams & params) const
    00106    { qAssert(params.owner()); return (* static_cast<type_owner *>(params.owner())); }
    00107
    00108    type_data & getData(QxSqlRelationParams & params) const
    00109    { return getData_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
    00110
    00111    type_container & getContainer(QxSqlRelationParams & params) const
    00112    { return getContainer_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
    00113
    00114    type_item createItem() const
    00115    { return createItem_Helper<is_data_container, 0>::get(); }
    00116
    00117    bool isNullData(QxSqlRelationParams & params) const
    00118    { return isNullData_Helper<is_data_pointer, 0>::get(getDataTypePtr(params)); }
    00119
    00120    bool callTriggerBeforeFetch(type_data & t, QxSqlRelationParams & params) const
    00121    {
    00122       if (! params.builder().getDaoHelper()) { return true; }
    00123       qx::dao::on_before_fetch<type_data>((& t), params.builder().getDaoHelper());
    00124       return params.builder().getDaoHelper()->isValid();
    00125    }
    00126
    00127    bool callTriggerAfterFetch(type_data & t, QxSqlRelationParams & params) const
    00128    {
    00129       if (! params.builder().getDaoHelper()) { return true; }
    00130       qx::dao::on_after_fetch<type_data>((& t), params.builder().getDaoHelper());
    00131       return params.builder().getDaoHelper()->isValid();
    00132    }
    00133
    00134 private:
    00135
    00136    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
    00137    struct getData_Helper
    00138    { static type_data & get(DataType * t) { return (* t); } };
    00139
    00140    template <int dummy>
    00141    struct getData_Helper<true, false, dummy>
    00142    { static type_data & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
    00143
    00144    template <int dummy>
    00145    struct getData_Helper<false, true, dummy>
    00146    { static type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
    00147
    00148    template <int dummy>
    00149    struct getData_Helper<true, true, dummy>
    00150    { static type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
    00151
    00152    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
    00153    struct getContainer_Helper
    00154    { static type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
    00155
    00156    template <int dummy>
    00157    struct getContainer_Helper<true, false, dummy>
    00158    { static type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
    00159
    00160    template <int dummy>
    00161    struct getContainer_Helper<false, true, dummy>
    00162    { static type_container & get(DataType * t) { return (* t); } };
    00163
    00164    template <int dummy>
    00165    struct getContainer_Helper<true, true, dummy>
    00166    { static type_container & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
    00167
    00168    template <bool bIsContainer /* = false */, int dummy>
    00169    struct createItem_Helper
    00170    { static type_item get() { qAssert(false); type_item * pDummy(NULL); return (* pDummy); } };
    00171
    00172    template <int dummy>
    00173    struct createItem_Helper<true, dummy>
    00174    { static type_item get() { return type_generic_container::createItem(); } };
    00175
    00176    template <bool bIsPointer /* = false */, int dummy>
    00177    struct isNullData_Helper
    00178    { static bool get(DataType * t) { Q_UNUSED(t); return false; } };
    00179
    00180    template <int dummy>
    00181    struct isNullData_Helper<true, dummy>
    00182    { static bool get(DataType * t) { return ((! (* t)) ? true : false); } };
    00183
    00184 };
    00185
    00186 } // namespace qx
    00187
    00188 #include <QxDao/QxSqlRelation_OneToOne.h>
    00189 #include <QxDao/QxSqlRelation_OneToMany.h>
    00190 #include <QxDao/QxSqlRelation_ManyToOne.h>
    00191 #include <QxDao/QxSqlRelation_ManyToMany.h>
    00192 #include <QxDao/QxSqlRelation_RawData.h>
    00193
    00194 #endif // _QX_SQL_RELATION_H_