greenplumn CParseHandlerMDRequest 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerMDRequest.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerMDRequest.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing MD requests
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerMDRequest.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::CParseHandlerMDRequest
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerMDRequest::CParseHandlerMDRequest(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_mdid_array(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::~CParseHandlerMDRequest
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CParseHandlerMDRequest::~CParseHandlerMDRequest()
{
CRefCount::SafeRelease(m_mdid_array);
CRefCount::SafeRelease(m_mdtype_request_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerMDRequest::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(EdxltokenMDRequest),
element_local_name))
{
/ start of MD request section
GPOS_ASSERT(nullptr == m_mdid_array);
m_mdid_array = GPOS_NEW(m_mp) IMdIdArray(m_mp);
m_mdtype_request_array =
GPOS_NEW(m_mp) CMDRequest::SMDTypeRequestArray(m_mp);
return;
}
if (0 == XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenMdid),
element_local_name))
{
GPOS_ASSERT(nullptr != m_mdid_array);
/ parse mdid
IMDId *mdid = CDXLOperatorFactory::ExtractConvertAttrValueToMdId(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenValue,
EdxltokenMdid);
m_mdid_array->Append(mdid);
return;
}
GPOS_ASSERT(0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenMDTypeRequest),
element_local_name));
GPOS_ASSERT(nullptr != m_mdtype_request_array);
CSystemId sysid = CDXLOperatorFactory::Sysid(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenSysid,
EdxltokenMDTypeRequest);
if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenMDTypeRequest),
element_local_name))
{
/ parse type request
IMDType::ETypeInfo type_info = (IMDType::ETypeInfo)
CDXLOperatorFactory::ExtractConvertAttrValueToUlong(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
EdxltokenTypeInfo, EdxltokenMDTypeRequest);
m_mdtype_request_array->Append(
GPOS_NEW(m_mp) CMDRequest::SMDTypeRequest(sysid, type_info));
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerMDRequest::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 ==
XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenMDRequest),
element_local_name))
{
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::GetParseHandlerType
/
/ @doc:
/ Return the type of the parse handler
/
/---------------------------------------------------------------------------
EDxlParseHandlerType
CParseHandlerMDRequest::GetParseHandlerType() const
{
return EdxlphMetadataRequest;
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::GetMdIdArray
/
/ @doc:
/ Parsed array of mdids
/
/---------------------------------------------------------------------------
IMdIdArray *
CParseHandlerMDRequest::GetMdIdArray() const
{
return m_mdid_array;
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerMDRequest::GetMDTypeRequestArray
/
/ @doc:
/ Parsed array of type requests
/
/---------------------------------------------------------------------------
CMDRequest::SMDTypeRequestArray *
CParseHandlerMDRequest::GetMDTypeRequestArray() const
{
return m_mdtype_request_array;
}
/ EOF
相关信息
相关文章
greenplumn CParseHandlerAgg 源码
greenplumn CParseHandlerAppend 源码
greenplumn CParseHandlerArray 源码
greenplumn CParseHandlerAssert 源码
greenplumn CParseHandlerBase 源码
greenplumn CParseHandlerBroadcastMotion 源码
greenplumn CParseHandlerCTEConfig 源码
greenplumn CParseHandlerCTEList 源码