//////////////////////////////////////////////////////////////////
// CComponentData
// 
// Exposes the IPropertyBag interface for the components to store
// their data in.
//
// Also supports other host specific settings.
//
// Current implementation saves the data in the registry and only
// saves when requested to by host.
//
// Component can pass a Variant NULL to delete the specified 
// property
//
// Only the following types are supported for now: 
//		VT_UI1 
//		VT_I2 
//		VT_I4 
//		VT_R4 
//		VT_R8 
//		VT_CY 
//		VT_BSTR
//////////////////////////////////////////////////////////////////


#if !defined(COMPONENTDATA_H__2AA70045_1988_11D2_B2D4_0020182B97FC__INCLUDED_)
#define COMPONENTDATA_H__2AA70045_1988_11D2_B2D4_0020182B97FC__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
// ComponentData.h : header file
//

#define DATA_KEY _T("Data")

#include "../common/interfaces.h"
#include <map>
#include <utility>
using std::map;
using std::make_pair;

#include <mystring.h>

typedef map<string, CComVariant> string_variant_map;

/////////////////////////////////////////////////////////////////////////////
// CComponentData command target
class ATL_NO_VTABLE CComponentData : 
	public CComObjectRootEx<CComMultiThreadModel>,
	public IPropertyBag
{

// Attributes
public:
	CComponentData();
	virtual ~CComponentData();


public:
	// Host specific functions
	// Add String support later when needed.
	bool WriteInt(const string& sKey, int nValue);
	int GetInt(const string& sKey, int nDefault);
	bool Delete(const string& sKey);

	// Can be used by Host and also called from the 
	// IPropertyBag Implementation below
	HRESULT Write(const string& sValName, const VARIANT& varVal);
	HRESULT Read(const string& sValName, VARIANT& varVal);

	// Initializes Key
	HRESULT Initialize(const string& sKey);


	// Saves All Setting to Registry Key
	// If sKey = NULL then saves to key given in Initialize
	HRESULT Save(string sKey = _T(""));


	// Returns an IUnknown to IPropertyBag
//	IUnknown* GetIUnknown(bool bAddRef = false);


protected:

	// Arrays of Settings to be written to Registry
	// Supports Integers and Strings Only
	string_variant_map m_mapValues;

	// Registry Key
	string m_sKey;

public:

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CComponentData)
	COM_INTERFACE_ENTRY(IPropertyBag)
END_COM_MAP()

	// IPropertyBag Interface
	STDMETHOD(Read)(LPCOLESTR pszPropName, VARIANT* pVar, IErrorLog* pErrorLog);
	STDMETHOD(Write)(LPCOLESTR pszPropName, VARIANT* pVar);

};

/////////////////////////////////////////////////////////////////////////////


#endif // !defined(COMPONENTDATA_H__2AA70045_1988_11D2_B2D4_0020182B97FC__INCLUDED_)