IContentTracker.h

//========================================================================================
// 
// $File$
// 
// Owner: robin briggs
// 
// $Author$
// 
// $DateTime$
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// $Revision$
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// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
// 
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
// with the terms of the Adobe license agreement accompanying it. If you have received
// this file from a source other than Adobe, then your use, modification, or 
// distribution of it requires the prior written permission of Adobe.
// 
//========================================================================================

#ifndef __IContentTracker__
#define __IContentTracker__

#include "ShuksanID.h"
#include "IPMStream.h"

class IContentTracker : public IPMUnknown
{
 public:
 enum { kDefaultIID = IID_ICONTENTTRACKER };

 virtual void AddTag(ImplementationID tag) = 0;

 virtual void AddClass(ClassID clsID) = 0;

 virtual void PushClassContext(ClassID context) = 0;

 virtual void PushImplementationContext(ImplementationID context) = 0;

 virtual void PopContext() = 0;
 
 virtual void Open(IDataBase *db, UID id) = 0;

 virtual void Close() = 0;
};


class ContentTrackerEnabler
{
public:
 ContentTrackerEnabler(IPMStream *stream, ClassID context)
 {
 fTracker = (IContentTracker *)stream->QueryInterface(IID_ICONTENTTRACKER);
 if (fTracker != nil)
 {
 fTracker->PushClassContext(context);
 }
 }

 ContentTrackerEnabler(IPMStream *stream, ImplementationID context)
 {
 fTracker = (IContentTracker *)stream->QueryInterface(IID_ICONTENTTRACKER);
 if (fTracker != nil)
 {
 fTracker->PushImplementationContext(context);
 }
 }

 ~ContentTrackerEnabler()
 {
 if (fTracker != nil)
 {
 fTracker->PopContext();
 fTracker->Release();
 }
 }

 IContentTracker *GetTracker() const
 {
 return fTracker;
 }

private:
 IContentTracker * fTracker;
};


#endif // __IContentTracker__