//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CParseHandlerMDRequest.h
//
//	@doc:
//		SAX parse handler class for metadata requests
//---------------------------------------------------------------------------

#ifndef GPDXL_CParseHandlerMDRequest_H
#define GPDXL_CParseHandlerMDRequest_H

#include "gpos/base.h"

#include "naucrates/dxl/parser/CParseHandlerBase.h"
#include "naucrates/md/CMDRequest.h"

namespace gpdxl
{
using namespace gpos;
using namespace gpmd;

XERCES_CPP_NAMESPACE_USE

//---------------------------------------------------------------------------
//	@class:
//		CParseHandlerMDRequest
//
//	@doc:
//		Parse handler for relation metadata
//
//---------------------------------------------------------------------------
class CParseHandlerMDRequest : public CParseHandlerBase
{
private:
	// array of metadata ids
	IMdIdArray *m_mdid_array;

	// array of type requests
	CMDRequest::SMDTypeRequestArray *m_mdtype_request_array;

	// process the start of an element
	void StartElement(
		const XMLCh *const element_uri,			// URI of element's namespace
		const XMLCh *const element_local_name,	// local part of element's name
		const XMLCh *const element_qname,		// element's qname
		const Attributes &attr					// element's attributes
		) override;

	// process the end of an element
	void EndElement(
		const XMLCh *const element_uri,			// URI of element's namespace
		const XMLCh *const element_local_name,	// local part of element's name
		const XMLCh *const element_qname		// element's qname
		) override;

public:
	CParseHandlerMDRequest(const CParseHandlerMDRequest &) = delete;

	// ctor
	CParseHandlerMDRequest(CMemoryPool *mp,
						   CParseHandlerManager *parse_handler_mgr,
						   CParseHandlerBase *pph);

	// dtor
	~CParseHandlerMDRequest() override;

	// parse handler type
	EDxlParseHandlerType GetParseHandlerType() const override;

	// parsed mdids
	IMdIdArray *GetMdIdArray() const;

	// parsed type requests
	CMDRequest::SMDTypeRequestArray *GetMDTypeRequestArray() const;
};
}  // namespace gpdxl

#endif	// !GPDXL_CParseHandlerMDRequest_H

// EOF