QxOrm  1.3.2
C++ Object Relational Mapping library
QxSqlRelation.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
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00012 ** Commercial Usage
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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
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00026 ** If you are unsure which license is appropriate for your use, or
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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 <boost/mpl/if.hpp>
00047 #include <boost/mpl/logical.hpp>
00048 #include <boost/type_traits/is_same.hpp>
00049 #include <boost/type_traits/is_pointer.hpp>
00050 
00051 #include <QxDao/QxDao.h>
00052 #include <QxDao/IxSqlRelation.h>
00053 #include <QxDao/IxSqlQueryBuilder.h>
00054 
00055 #include <QxTraits/remove_attr.h>
00056 #include <QxTraits/remove_smart_ptr.h>
00057 #include <QxTraits/generic_container.h>
00058 #include <QxTraits/is_container.h>
00059 #include <QxTraits/is_valid_primary_key.h>
00060 #include <QxTraits/is_qx_registered.h>
00061 
00062 namespace qx {
00063 
00064 template <class T>
00065 class QxClass;
00066 
00071 template <class DataType, class Owner>
00072 class QxSqlRelation : public IxSqlRelation
00073 {
00074 
00075 protected:
00076 
00077    typedef typename qx::trait::remove_attr<DataType>::type type_tmp_1;
00078    typedef typename qx::trait::remove_smart_ptr<type_tmp_1>::type type_tmp_2;
00079    typedef type_tmp_2 type_container;
00080    typedef qx::trait::generic_container<type_container> type_generic_container;
00081    typedef typename type_generic_container::type_item type_item;
00082    typedef typename boost::mpl::if_c<qx::trait::is_container<type_container>::value, typename type_generic_container::type_value_qx, type_container>::type type_tmp_3;
00083    typedef typename QxSqlRelation<DataType, Owner>::type_tmp_3 type_data;
00084    typedef Owner type_owner;
00085 
00086    enum { is_valid = (qx::trait::is_qx_registered<type_data>::value && qx::trait::is_qx_registered<type_owner>::value) };
00087    enum { is_data_pointer = (boost::is_pointer<DataType>::value || qx::trait::is_smart_ptr<DataType>::value) };
00088    enum { is_data_container = qx::trait::is_container<type_container>::value };
00089    enum { is_same_data_owner = boost::is_same<type_data, type_owner>::value };
00090 
00091 protected:
00092 
00093    static QxCollection<QString, IxDataMember *> m_lstDataMember;     
00094    static IxSqlRelationX m_lstSqlRelation;                           
00095    static QMutex m_oMutex;                                           
00096    bool m_bInitInEvent;                                              
00097 
00098 public:
00099 
00100    QxSqlRelation(IxDataMember * p) : IxSqlRelation(p), m_bInitInEvent(false) { ; }
00101    virtual ~QxSqlRelation() { BOOST_STATIC_ASSERT(is_valid); }
00102 
00103    virtual void init()
00104    {
00105       if (m_bInitInEvent) { return; }; m_bInitInEvent = true;
00106       QMutexLocker locker(& QxSqlRelation<DataType, Owner>::m_oMutex);
00107       m_pClass = QxClass<type_data>::getSingleton();
00108       m_pClassOwner = QxClass<type_owner>::getSingleton();
00109       m_pDataMemberX = (m_pClass ? m_pClass->getDataMemberX() : NULL);
00110       m_pDataMemberId = (m_pDataMemberX ? m_pDataMemberX->getId_WithDaoStrategy() : NULL);
00111       m_pDataMemberIdOwner = ((m_pClassOwner && m_pClassOwner->getDataMemberX()) ? m_pClassOwner->getDataMemberX()->getId_WithDaoStrategy() : NULL);
00112       m_lstDataMemberPtr = (& QxSqlRelation<DataType, Owner>::m_lstDataMember);
00113       m_lstSqlRelationPtr = (& QxSqlRelation<DataType, Owner>::m_lstSqlRelation);
00114       if (m_pClass) { m_oSoftDelete = m_pClass->getSoftDelete(); }
00115       qAssert(m_pClass && m_pClassOwner && m_pDataMember && m_pDataMemberX && m_pDataMemberId);
00116       if (getDataCount() > 0 || getRelationCount() > 0) { m_bInitInEvent = false; return; }
00117       IxDataMember * p = NULL; long lCount = m_pDataMemberX->count_WithDaoStrategy();
00118       for (long l = 0; l < lCount; ++l) { if ((p = isValid_DataMember(l))) { m_lstDataMember.insert(p->getKey(), p); } }
00119       for (long l = 0; l < lCount; ++l) { if ((p = isValid_SqlRelation(l))) { m_lstSqlRelation.insert(p->getKey(), p->getSqlRelation()); } }
00120       m_bInitInEvent = false;
00121    }
00122 
00123 private:
00124 
00125    inline IxDataMember * isValid_DataMember(long lIndex) const
00126    {
00127       IxDataMember * p = m_pDataMemberX->get_WithDaoStrategy(lIndex);
00128       bool bValid = (p && p->getDao() && ! p->hasSqlRelation());
00129       bValid = (bValid && (p != m_pDataMemberId));
00130       return (bValid ? p : NULL);
00131    }
00132 
00133    inline IxDataMember * isValid_SqlRelation(long lIndex) const
00134    {
00135       IxDataMember * p = m_pDataMemberX->get_WithDaoStrategy(lIndex);
00136       bool bIsValid = (p && p->getDao() && p->hasSqlRelation());
00137       if (bIsValid && (! is_same_data_owner) && (p != m_pDataMember)) { p->getSqlRelation()->init(); }
00138       return (bIsValid ? p : NULL);
00139    }
00140 
00141 protected:
00142 
00143    inline DataType * getDataTypePtr(QxSqlRelationParams & params) const
00144    { qAssert(params.owner() && m_pDataMember); return static_cast<DataType *>(m_pDataMember->getValueVoidPtr(params.owner())); }
00145 
00146    inline type_owner & getOwner(QxSqlRelationParams & params) const
00147    { qAssert(params.owner()); return (* static_cast<type_owner *>(params.owner())); }
00148 
00149    inline type_data & getData(QxSqlRelationParams & params) const
00150    { return getData_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
00151 
00152    inline type_container & getContainer(QxSqlRelationParams & params) const
00153    { return getContainer_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
00154 
00155    inline type_item createItem() const
00156    { return createItem_Helper<is_data_container, 0>::get(); }
00157 
00158    inline bool isNullData(QxSqlRelationParams & params) const
00159    { return isNullData_Helper<is_data_pointer, 0>::get(getDataTypePtr(params)); }
00160 
00161    bool callTriggerBeforeFetch(type_data & t, QxSqlRelationParams & params) const
00162    {
00163       if (! params.builder().getDaoHelper()) { return true; }
00164       qx::dao::on_before_fetch<type_data>((& t), params.builder().getDaoHelper());
00165       return params.builder().getDaoHelper()->isValid();
00166    }
00167 
00168    bool callTriggerAfterFetch(type_data & t, QxSqlRelationParams & params) const
00169    {
00170       if (! params.builder().getDaoHelper()) { return true; }
00171       qx::dao::on_after_fetch<type_data>((& t), params.builder().getDaoHelper());
00172       return params.builder().getDaoHelper()->isValid();
00173    }
00174 
00175 private:
00176 
00177    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
00178    struct getData_Helper
00179    { static inline type_data & get(DataType * t) { return (* t); } };
00180 
00181    template <int dummy>
00182    struct getData_Helper<true, false, dummy>
00183    { static inline type_data & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
00184 
00185    template <int dummy>
00186    struct getData_Helper<false, true, dummy>
00187    { static inline type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
00188 
00189    template <int dummy>
00190    struct getData_Helper<true, true, dummy>
00191    { static inline type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
00192 
00193    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
00194    struct getContainer_Helper
00195    { static inline type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
00196 
00197    template <int dummy>
00198    struct getContainer_Helper<true, false, dummy>
00199    { static inline type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
00200 
00201    template <int dummy>
00202    struct getContainer_Helper<false, true, dummy>
00203    { static inline type_container & get(DataType * t) { return (* t); } };
00204 
00205    template <int dummy>
00206    struct getContainer_Helper<true, true, dummy>
00207    { static inline type_container & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
00208 
00209    template <bool bIsContainer /* = false */, int dummy>
00210    struct createItem_Helper
00211    { static inline type_item get() { qAssert(false); type_item * pDummy(NULL); return (* pDummy); } };
00212 
00213    template <int dummy>
00214    struct createItem_Helper<true, dummy>
00215    { static inline type_item get() { return type_generic_container::createItem(); } };
00216 
00217    template <bool bIsPointer /* = false */, int dummy>
00218    struct isNullData_Helper
00219    { static inline bool get(DataType * t) { Q_UNUSED(t); return false; } };
00220 
00221    template <int dummy>
00222    struct isNullData_Helper<true, dummy>
00223    { static inline bool get(DataType * t) { return ((! (* t)) ? true : false); } };
00224 
00225 };
00226 
00227 template <class DataType, class Owner> QxCollection<QString, IxDataMember *> QxSqlRelation<DataType, Owner>::m_lstDataMember;
00228 template <class DataType, class Owner> IxSqlRelationX QxSqlRelation<DataType, Owner>::m_lstSqlRelation;
00229 template <class DataType, class Owner> QMutex QxSqlRelation<DataType, Owner>::m_oMutex(QMutex::Recursive);
00230 
00231 } // namespace qx
00232 
00233 #include <QxDao/QxSqlRelation_OneToOne.h>
00234 #include <QxDao/QxSqlRelation_OneToMany.h>
00235 #include <QxDao/QxSqlRelation_ManyToOne.h>
00236 #include <QxDao/QxSqlRelation_ManyToMany.h>
00237 #include <QxDao/QxSqlRelation_RawData.h>
00238 
00239 #endif // _QX_SQL_RELATION_H_