objiter.h Source File

00001 /*
00002     Copyright (C) 2001 by Martin Geisse <mgeisse@gmx.net>
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __OBJITER_H__
00020 #define __OBJITER_H__
00021 
00022 #include "iutil/object.h"
00023 
00028 #define CS_DECLARE_OBJECT_ITERATOR(NAME,INTERFACE)                      \
00029   class NAME : public csTypedObjectIterator                             \
00030   {                                                                     \
00031   protected:                                                            \
00032     virtual void GetRequestedInterface (scfInterfaceID &id, int &ver) const     \
00033     { id = scfGetID_##INTERFACE (); ver = VERSION_##INTERFACE; }        \
00034   public:                                                               \
00035     inline NAME (iObject *Parent) : csTypedObjectIterator (Parent)      \
00036       { FetchObject (); }                                               \
00037     inline INTERFACE *Get ()                                            \
00038       { return (INTERFACE*)CurrentTypedObject; }                        \
00039   };
00040 
00041 class csTypedObjectIterator
00042 {
00043 protected:
00044   iObjectIterator *iter;
00045   iBase *CurrentTypedObject;
00046 
00047   void FetchObject ();
00048   virtual void GetRequestedInterface (scfInterfaceID &id, int &ver) const = 0;
00049 
00050 public:
00051   // constructor
00052   csTypedObjectIterator (iObject *Parent);
00053   // destructor
00054   virtual ~csTypedObjectIterator ();
00055 
00056   // Move forward
00057   inline bool Next();
00058   // Reset the iterator to the beginning
00059   inline void Reset();
00060   // Get the object we are pointing at
00061   inline iObject *GetObject () const;
00062   // Get the parent object
00063   inline iObject *GetParentObj() const;
00064   // Check if we have any children of requested type
00065   inline bool IsFinished () const;
00066   // Find the object with the given name
00067   inline bool FindName (const char* name);
00068 };
00069 
00070 inline bool csTypedObjectIterator::Next()
00071   { bool r = iter->Next (); FetchObject (); return r; }
00072 inline void csTypedObjectIterator::Reset()
00073   { iter->Reset (); FetchObject (); }
00074 inline iObject *csTypedObjectIterator::GetObject () const
00075   { return iter->GetObject (); }
00076 inline iObject *csTypedObjectIterator::GetParentObj() const
00077   { return iter->GetParentObj (); }
00078 inline bool csTypedObjectIterator::IsFinished () const
00079   { return iter->IsFinished (); }
00080 inline bool csTypedObjectIterator::FindName (const char* name)
00081   { bool r = iter->FindName (name); FetchObject (); return r; }
00082 
00083 #endif // __OBJITER_H__