#ifndef CMETADATA_UTILITY_ITF_H
#define CMETADATA_UTILITY_ITF_H


#ifdef __cplusplus

#include <e32base.h>
#include <e32std.h>
#include <e32hashtab.h>
#include <OpenMAXAL.h>

#include <Hxmetadatautil.h>
#include <MetaDataUtility.h>
#include <MetaDataFieldContainer.h>
#include <MetaDataField.hrh>


#define MAX_EXTENSION_SIZE 10
#define uint32 unsigned int

class CS60MetadataUtilityItf;
class CHXMetadataUtilityItf;

NONSHARABLE_CLASS(CMetadataUtilityItf)
{
public:

	enum TValueEncodingType
	{
		EUnknownEncoding,
		EAsciiEncoding,
		EUnicodeEncoding,
		EBinaryEncoding,	
	};
	
	static CMetadataUtilityItf* New(char* uri);

	CMetadataUtilityItf();
	virtual ~CMetadataUtilityItf();
	TInt ParseSource(char* uri);
	TInt OpenSource(char* uri);	
	TInt CalculateNumMetadataItems(TUint*);
	char* GetKey(TInt index);
	TInt GetValueSize(TInt index);
	TInt GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);

	//helper function
	//extracts left part of input descriptor upto (maxLen-1) and copies content in outPtr
	//append a null terminator
	static TInt ExtractUCS2(TDesC& inDes, char* outPtr,TInt maxLen);

private:
	CS60MetadataUtilityItf* m_pS60Util;
	CHXMetadataUtilityItf*  m_pHXUtil;
};


NONSHARABLE_CLASS(CS60MetadataUtilityItf)
{
public:

	static CS60MetadataUtilityItf* New();
  	~CS60MetadataUtilityItf();

	TInt CalculateNumMetadataItems(TUint*);
	
	char* GetKey(TInt index);
	TInt  GetValueSize(TInt index);
	TInt  GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);

	TInt 	ParseSource(TDesC&);

	char* KeyMapping(TMetaDataFieldId);
	TInt  ValueEncoding(TMetaDataFieldId);

	static bool IsSupportedExtension(char* extn);

	TInt Reset();

private:
	
    CS60MetadataUtilityItf();
    void ConstructL();
	
   	CMetaDataUtility* pMetaDataUtility; //S60MetadataUtility
   	
	TUint 		uNumMetadataItems;		
		
};

NONSHARABLE_CLASS(CHXMetadataUtilityItf)
{
public:

	static CHXMetadataUtilityItf* New();
  ~CHXMetadataUtilityItf();

	TInt CalculateNumMetadataItems(TUint*);
	
	char* GetKey(TInt index);
	
	TInt ValueEncoding(HXMetaDataKeys::EHXMetaDataId fldID);
	TInt  GetValueSize(TInt index);
	TInt  GetValue(TInt index, char* data, TInt maxLength, TInt* outSize, TInt* encodingType);
	
	TInt 	ParseSource(TDesC&);
	char* KeyMapping(HXMetaDataKeys::EHXMetaDataId);
	
	TInt Reset();

private:
	CHXMetadataUtilityItf();
    void ConstructL();
   	
  CHXMetaDataUtility *pHXMetaDataUtility;
  
  TUint 	  uNumMetadataItems;	  
};


#else

extern void* mmf_metadata_utility_init(char*);
extern void  mmf_metadata_utility_destroy(void* context);
extern XAresult mmf_metadata_utility_parse_source(void* , char*);
extern XAresult  mmf_get_item_count(void* context, XAuint32* itemCount);
extern XAresult  mmf_get_key_size(void* context, XAuint32 keyIndex, XAuint32* keySize);
extern XAresult  mmf_get_key(void* context, XAuint32 index,XAuint32 keySize, XAMetadataInfo *pKey);
extern XAresult  mmf_get_value_size(void* context, XAuint32 index, XAuint32 *pValueSize);
extern XAresult  mmf_get_value(void* context, XAuint32 index, XAuint32 valueSize, XAMetadataInfo *pValue);
#endif //__cplusplus

#endif