greenplumn CParseHandlerDirectDispatchInfo 源码

greenplumn CParseHandlerDirectDispatchInfo 代码

文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerDirectDispatchInfo.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2013 VMware, Inc. or its affiliates.
//
//	@filename:
//		CParseHandlerDirectDispatchInfo.cpp
//
//	@doc:
//		Implementation of the SAX parse handler class for parsing direct dispatch info
//
//	@owner:
//
//
//	@test:
//
//---------------------------------------------------------------------------

#include "naucrates/dxl/parser/CParseHandlerDirectDispatchInfo.h"

#include "naucrates/dxl/operators/CDXLDirectDispatchInfo.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"

using namespace gpdxl;
using namespace gpopt;


//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerDirectDispatchInfo::CParseHandlerDirectDispatchInfo
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CParseHandlerDirectDispatchInfo::CParseHandlerDirectDispatchInfo(
	CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
	CParseHandlerBase *parse_handler_root)
	: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
	  m_dxl_datum_array(nullptr),
	  m_datum_array_combination(nullptr),
	  m_direct_dispatch_info(nullptr),
	  m_dispatch_is_raw(false)
{
}


//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerDirectDispatchInfo::~CParseHandlerDirectDispatchInfo
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CParseHandlerDirectDispatchInfo::~CParseHandlerDirectDispatchInfo()
{
	CRefCount::SafeRelease(m_dxl_datum_array);
	CRefCount::SafeRelease(m_direct_dispatch_info);
}


//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerDirectDispatchInfo::StartElement
//
//	@doc:
//		Invoked by Xerces to process an opening tag
//
//---------------------------------------------------------------------------
void
CParseHandlerDirectDispatchInfo::StartElement(
	const XMLCh *const,	 //element_uri,
	const XMLCh *const element_local_name,
	const XMLCh *const,	 // element_qname,
	const Attributes &attrs)
{
	if (0 == XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenDirectDispatchInfo),
				 element_local_name))
	{
		m_dispatch_is_raw = CDXLOperatorFactory::ExtractConvertAttrValueToBool(
			m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
			EdxltokenDirectDispatchIsRaw, EdxltokenDirectDispatchInfo,
			true,  // optional
			false  // default
		);

		m_datum_array_combination = GPOS_NEW(m_mp) CDXLDatum2dArray(m_mp);
	}
	else if (0 == XMLString::compareString(
					  CDXLTokens::XmlstrToken(EdxltokenDirectDispatchKeyValue),
					  element_local_name))
	{
		CRefCount::SafeRelease(m_dxl_datum_array);
		m_dxl_datum_array = GPOS_NEW(m_mp) CDXLDatumArray(m_mp);
	}
	else if (0 ==
			 XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenDatum),
									  element_local_name))
	{
		GPOS_ASSERT(nullptr != m_dxl_datum_array);

		CDXLDatum *dxl_datum = CDXLOperatorFactory::GetDatumVal(
			m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
			EdxltokenDirectDispatchInfo);
		m_dxl_datum_array->Append(dxl_datum);
	}
	else
	{
		CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
			m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
		GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
				   str->GetBuffer());
	}
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerDirectDispatchInfo::EndElement
//
//	@doc:
//		Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerDirectDispatchInfo::EndElement(
	const XMLCh *const,	 // element_uri,
	const XMLCh *const element_local_name,
	const XMLCh *const	// element_qname
)
{
	if (0 == XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenDirectDispatchInfo),
				 element_local_name))
	{
		m_direct_dispatch_info = GPOS_NEW(m_mp) CDXLDirectDispatchInfo(
			m_datum_array_combination, m_dispatch_is_raw);
		m_parse_handler_mgr->DeactivateHandler();
	}
	else if (0 == XMLString::compareString(
					  CDXLTokens::XmlstrToken(EdxltokenDirectDispatchKeyValue),
					  element_local_name))
	{
		GPOS_ASSERT(nullptr != m_dxl_datum_array);
		m_dxl_datum_array->AddRef();
		m_datum_array_combination->Append(m_dxl_datum_array);
	}
	else if (0 !=
			 XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenDatum),
									  element_local_name))
	{
		CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
			m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
		GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
				   str->GetBuffer());
	}
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerDirectDispatchInfo::GetDXLDirectDispatchInfo
//
//	@doc:
//		Return parsed DXL datum array
//
//---------------------------------------------------------------------------
CDXLDirectDispatchInfo *
CParseHandlerDirectDispatchInfo::GetDXLDirectDispatchInfo() const
{
	return m_direct_dispatch_info;
}

// EOF

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