--- a/epoc32/include/caldataexchange.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/caldataexchange.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,89 @@
-caldataexchange.h
+// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#ifndef __CCALDATAEXCHANGE_H__ 
+#define __CCALDATAEXCHANGE_H__
+
+#include <calentry.h>
+
+class CCalDataExchangeImpl;
+class CCalSession;
+class RWriteStream;
+
+/** The default number of entries to import or export between callbacks.
+@publishedAll
+@released
+*/
+const TInt KDefaultNumberOfEntriesToHandle = 10;
+
+/** A call back class to show the progress of long-running operations.
+
+When a long-running operation is carried out, this class is used to signal its progress, 
+and when the function is complete.
+
+@publishedAll
+@released
+*/
+class MCalDataExchangeCallBack
+	{
+public:
+	/** Progress callback. 
+
+	This calls the observing class with the percentage complete of the current operation.
+	This also propagates any error to the observing class.
+
+	@param aPercentageCompleted The percentage complete. */
+	virtual void Progress(TInt aPercentageCompleted) = 0;
+
+	/** Progress callback.
+
+	This calls the observing class when the current operation is finished. */
+	virtual void Completed() = 0;
+	
+	/* Retrieve the number of entries to handle at once. 
+	@return The number of entries to handle at once.
+	*/
+	virtual TInt NumberOfEntriesToHandleAtOnce() { return KDefaultNumberOfEntriesToHandle; };
+	};
+
+/** 
+This class provides functionality for importing and exporting vCal entries.
+@publishedAll
+@released
+*/
+NONSHARABLE_CLASS(CCalDataExchange) : public CBase
+	{
+public:
+	IMPORT_C static CCalDataExchange* NewL(CCalSession& aSession);
+	IMPORT_C ~CCalDataExchange();
+	
+	IMPORT_C void ImportL(TUid aDataFormat, RReadStream& aReadStream, RPointerArray<CCalEntry>& aCalEntryArray);
+	IMPORT_C void ImportL(TUid aDataFormat, RReadStream& aReadStream, RPointerArray<CCalEntry>& aCalEntryArray, TInt aFlags);
+	IMPORT_C void ExportL(TUid aDataFormat, RWriteStream& aWriteStream, RPointerArray<CCalEntry>& aCalEntryArray);	
+	
+	IMPORT_C void ImportL(TUid aDataFormat, RReadStream& aReadStream, RPointerArray<CCalEntry>& aCalEntryArray, TInt aFlags, TInt aNumEntries);
+
+	IMPORT_C void ImportAsyncL(TUid aDataFormat, RReadStream& aReadStream, RPointerArray<CCalEntry>& aCalEntryArray, MCalDataExchangeCallBack& aObserver, TInt aFlags);
+	IMPORT_C void ExportAsyncL(TUid aDataFormat, RWriteStream& aWriteStream, RPointerArray<CCalEntry>& aCalEntryArray, MCalDataExchangeCallBack& aObserver);
+	
+private:
+	CCalDataExchange();
+	void ConstructL(CCalSession& aSession);
+	
+private:
+	CCalDataExchangeImpl* iImpl;
+	};
+
+#endif // __CCALDATAEXCHANGE_H__