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morkSortingRowCursor.h
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00037 
00038 #ifndef _MORKSORTINGROWCURSOR_
00039 #define _MORKSORTINGROWCURSOR_ 1
00040 
00041 #ifndef _MORK_
00042 #include "mork.h"
00043 #endif
00044 
00045 #ifndef _MORKCURSOR_
00046 #include "morkCursor.h"
00047 #endif
00048 
00049 #ifndef _MORKSORTINGROWCURSOR_
00050 #include "morkSortingRowCursor.h"
00051 #endif
00052 
00053 #ifndef _MORKTABLEROWCURSOR_
00054 #include "morkTableRowCursor.h"
00055 #endif
00056 
00057 #ifndef _MORKMAP_
00058 #include "morkMap.h"
00059 #endif
00060 
00061 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00062 
00063 class orkinSortingRowCursor;
00064 // define morkDerived_kSortingRowCursor  /*i*/ 0x7343 /* ascii 'sC' */
00065 
00066 class morkSortingRowCursor : public morkTableRowCursor { // row iterator
00067 
00068 // public: // slots inherited from morkObject (meant to inform only)
00069   // nsIMdbHeap*     mNode_Heap;
00070   // mork_able    mNode_Mutable; // can this node be modified?
00071   // mork_load    mNode_Load;    // is this node clean or dirty?
00072   // mork_base    mNode_Base;    // must equal morkBase_kNode
00073   // mork_derived mNode_Derived; // depends on specific node subclass
00074   // mork_access  mNode_Access;  // kOpen, kClosing, kShut, or kDead
00075   // mork_usage   mNode_Usage;   // kHeap, kStack, kMember, kGlobal, kNone
00076   // mork_uses    mNode_Uses;    // refcount for strong refs
00077   // mork_refs    mNode_Refs;    // refcount for strong refs + weak refs
00078 
00079   // morkFactory* mObject_Factory;  // weak ref to suite factory
00080 
00081   // mork_seed  mCursor_Seed;
00082   // mork_pos   mCursor_Pos;
00083   // mork_bool  mCursor_DoFailOnSeedOutOfSync;
00084   // mork_u1    mCursor_Pad[ 3 ]; // explicitly pad to u4 alignment
00085 
00086   // morkTable*  mTableRowCursor_Table; // weak ref to table
00087 
00088 public: // state is public because the entire Mork system is private
00089 
00090   morkSorting*  mSortingRowCursor_Sorting; // weak ref to sorting
00091     
00092 // { ===== begin morkNode interface =====
00093 public: // morkNode virtual methods
00094   virtual void CloseMorkNode(morkEnv* ev); // CloseSortingRowCursor()
00095   virtual ~morkSortingRowCursor(); // assert that close executed earlier
00096   
00097 public: // morkSortingRowCursor construction & destruction
00098   morkSortingRowCursor(morkEnv* ev, const morkUsage& inUsage,
00099     nsIMdbHeap* ioHeap, morkTable* ioTable, mork_pos inRowPos,
00100     morkSorting* ioSorting);
00101   void CloseSortingRowCursor(morkEnv* ev); // called by CloseMorkNode();
00102 
00103 private: // copying is not allowed
00104   morkSortingRowCursor(const morkSortingRowCursor& other);
00105   morkSortingRowCursor& operator=(const morkSortingRowCursor& other);
00106 
00107 public: // dynamic type identification
00108   // mork_bool IsSortingRowCursor() const
00109   // { return IsNode() && mNode_Derived == morkDerived_kSortingRowCursor; }
00110 // } ===== end morkNode methods =====
00111 
00112 public: // typing
00113   static void NonSortingRowCursorTypeError(morkEnv* ev);
00114 
00115 public: // other table row cursor methods
00116 
00117   virtual mork_bool CanHaveDupRowMembers(morkEnv* ev);
00118   virtual mork_count GetMemberCount(morkEnv* ev);
00119 
00120   virtual orkinTableRowCursor* AcquireUniqueRowCursorHandle(morkEnv* ev);
00121   
00122   // virtual mdb_pos NextRowOid(morkEnv* ev, mdbOid* outOid);
00123   virtual morkRow* NextRow(morkEnv* ev, mdbOid* outOid, mdb_pos* outPos);
00124 
00125 public: // typesafe refcounting inlines calling inherited morkNode methods
00126   static void SlotWeakSortingRowCursor(morkSortingRowCursor* me,
00127     morkEnv* ev, morkSortingRowCursor** ioSlot)
00128   { morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
00129   
00130   static void SlotStrongSortingRowCursor(morkSortingRowCursor* me,
00131     morkEnv* ev, morkSortingRowCursor** ioSlot)
00132   { morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); }
00133 };
00134 
00135 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00136 
00137 #endif /* _MORKSORTINGROWCURSOR_ */