OW_WQLImpl.cpp

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#include "OW_WQLImpl.hpp"
#include "OW_MutexLock.hpp"
#include "OW_WQLProcessor.hpp"
#include "OW_WQLAst.hpp"
#include "OW_AutoPtr.hpp"
#include "OW_CIMException.hpp"
#include "OW_WQLSelectStatementGen.hpp"
#include "OW_ResultHandlerIFC.hpp"
#include "OW_ServiceIFCNames.hpp"

namespace OW_NAMESPACE
{

Mutex WQLImpl::s_classLock;
const char* WQLImpl::s_parserInput = 0;
stmt* WQLImpl::s_statement = 0;

WQLImpl::~WQLImpl()
{
}

String
WQLImpl::getName() const
{
   return ServiceIFCNames::WQL;
}

void WQLImpl::evaluate(const String& nameSpace,
   CIMInstanceResultHandlerIFC& result,
   const String& query, const String& queryLanguage,
   const CIMOMHandleIFCRef& hdl)
{
   OW_WQL_LOG_DEBUG(Format("nameSpace %1, query %2, queryLanguage %3 .", nameSpace, query, queryLanguage));
   MutexLock lock(s_classLock);
   // set up the parser's input
   s_parserInput = query.c_str();
   WQLscanner_init();
#ifdef YYOW_DEBUG
   owwqldebug = 1;
#endif
   OW_WQL_LOG_DEBUG("Parsing: ");
   int owwqlresult = owwqlparse();
   if (owwqlresult)
   {
      OW_THROWCIMMSG(CIMException::INVALID_QUERY, "Parse failed");
   }
   else
   {
      OW_WQL_LOG_DEBUG("Parse succeeded");
   }
   OW_WQL_LOG_DEBUG("Processing: ");
   WQLProcessor p(hdl, nameSpace);
   AutoPtr<stmt> pAST(WQLImpl::s_statement);
   lock.release();
   if (pAST.get())
   {
      pAST->acceptInterface(&p);
   }
   else
   {
      OW_WQL_LOG_DEBUG("pAST was NULL!");
   }
   CIMInstanceArray instances = p.getInstances();
   for (size_t i = 0; i < instances.size(); ++i)
   {
      result.handle(instances[i]);
   }

   s_parserInput = 0;
}

WQLSelectStatement
WQLImpl::createSelectStatement(const String& query)
{
   MutexLock lock(s_classLock);
   // set up the parser's input
   s_parserInput = query.c_str();
   WQLscanner_init();
#ifdef YYOW_DEBUG
   owwqldebug = 1;
#endif
   int owwqlresult = owwqlparse();
   if (owwqlresult)
   {
      OW_THROWCIMMSG(CIMException::INVALID_QUERY, "Parse failed");
   }
   else
   {
      OW_WQL_LOG_DEBUG("Parse succeeded");
   }
   WQLSelectStatementGen p;
   AutoPtr<stmt> pAST(WQLImpl::s_statement);
   lock.release();
   if (pAST.get())
   {
      pAST->acceptInterface(&p);
   }
   else
   {
      OW_WQL_LOG_DEBUG("pAST was NULL!");
   }
   
   s_parserInput = 0;

   return p.getSelectStatement();
}
bool WQLImpl::supportsQueryLanguage(const String& lang)
{
   if (lang.equalsIgnoreCase("wql1"))
   {
      return true;
   }
   else if (lang.equalsIgnoreCase("wql2"))
   {
      return true;
   }
   else if (lang.equalsIgnoreCase("wql"))
   {
      return true;
   }
   else
   {
      return false;
   }
}

void
WQLImpl::init(const ServiceEnvironmentIFCRef& env)
{
}

void
WQLImpl::shutdown()
{
}

} // end namespace OW_NAMESPACE

OW_WQLFACTORY(OpenWBEM::WQLImpl,wqlimpl);

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