greenplumn CParseHandlerScalarBitmapBoolOp 源码

greenplumn CParseHandlerScalarBitmapBoolOp 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2014 VMware, Inc. or its affiliates.
//
//	@filename:
//		CParseHandlerScalarBitmapBoolOp.cpp
//
//	@doc:
//
//		Implementation of the SAX parse handler class for parsing scalar bitmap
//		bool op
//---------------------------------------------------------------------------

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

#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/operators/CDXLScalarBitmapBoolOp.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"


using namespace gpdxl;


XERCES_CPP_NAMESPACE_USE

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerScalarBitmapBoolOp::CParseHandlerScalarBitmapBoolOp
//
//	@doc:
//		Constructor
//
//---------------------------------------------------------------------------
CParseHandlerScalarBitmapBoolOp::CParseHandlerScalarBitmapBoolOp(
	CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
	CParseHandlerBase *parse_handler_root)
	: CParseHandlerScalarOp(mp, parse_handler_mgr, parse_handler_root)
{
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerScalarBitmapBoolOp::StartElement
//
//	@doc:
//		Processes a Xerces start element event
//
//---------------------------------------------------------------------------
void
CParseHandlerScalarBitmapBoolOp::StartElement(
	const XMLCh *const,	 // element_uri
	const XMLCh *const element_local_name,
	const XMLCh *const,	 // element_qname
	const Attributes &attrs)
{
	CDXLScalarBitmapBoolOp::EdxlBitmapBoolOp bitmap_bool_dxlop =
		CDXLScalarBitmapBoolOp::EdxlbitmapAnd;
	Edxltoken token_type = EdxltokenScalarBitmapAnd;

	if (0 == XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenScalarBitmapOr),
				 element_local_name))
	{
		bitmap_bool_dxlop = CDXLScalarBitmapBoolOp::EdxlbitmapOr;
		token_type = EdxltokenScalarBitmapOr;
	}
	else if (0 != XMLString::compareString(
					  CDXLTokens::XmlstrToken(EdxltokenScalarBitmapAnd),
					  element_local_name))
	{
		GPOS_RAISE(
			gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
			CDXLUtils::CreateDynamicStringFromXMLChArray(
				m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name)
				->GetBuffer());
	}

	IMDId *mdid = CDXLOperatorFactory::ExtractConvertAttrValueToMdId(
		m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenTypeId,
		token_type);
	m_dxl_node = GPOS_NEW(m_mp) CDXLNode(
		m_mp,
		GPOS_NEW(m_mp) CDXLScalarBitmapBoolOp(m_mp, mdid, bitmap_bool_dxlop));

	// install parse handlers for children
	CParseHandlerBase *right_child_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenScalar), m_parse_handler_mgr,
			this);
	m_parse_handler_mgr->ActivateParseHandler(right_child_parse_handler);

	CParseHandlerBase *left_child_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenScalar), m_parse_handler_mgr,
			this);
	m_parse_handler_mgr->ActivateParseHandler(left_child_parse_handler);

	this->Append(left_child_parse_handler);
	this->Append(right_child_parse_handler);
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerScalarBitmapBoolOp::EndElement
//
//	@doc:
//		Processes a Xerces end element event
//
//---------------------------------------------------------------------------
void
CParseHandlerScalarBitmapBoolOp::EndElement(
	const XMLCh *const,	 // element_uri,
	const XMLCh *const element_local_name,
	const XMLCh *const	// element_qname
)
{
	if (0 != XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenScalarBitmapOr),
				 element_local_name) &&
		0 != XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenScalarBitmapAnd),
				 element_local_name))
	{
		GPOS_RAISE(
			gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
			CDXLUtils::CreateDynamicStringFromXMLChArray(
				m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name)
				->GetBuffer());
	}

	const ULONG size = this->Length();
	GPOS_ASSERT(2 == size);

	// add constructed children from child parse handlers
	for (ULONG idx = 0; idx < size; idx++)
	{
		CParseHandlerOp *op_parse_handler =
			dynamic_cast<CParseHandlerOp *>((*this)[idx]);
		AddChildFromParseHandler(op_parse_handler);
	}

	// deactivate handler
	m_parse_handler_mgr->DeactivateHandler();
}

// EOF

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