Exemplo n.º 1
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::deleteClass
//
// ///////////////////////////////////////////////////////////////////////////
void WMIClassProvider::deleteClass(const String& nameSpace,
								   const String& userName,
								   const String& password,
								   const String& className)
{
	HRESULT hr;
	
	PEG_METHOD_ENTER(TRC_WMIPROVIDER,"WMIClassProvider::deleteClass()");

	CComPtr<IWbemServices> pServices;

	//Connect to namespace
	setup(nameSpace,userName,password);
	
	bool bConnected = _collector->Connect(&pServices);
	
	if (!bConnected) 
	{
		if (pServices)
			pServices.Release();

		throw CIMException(CIM_ERR_ACCESS_DENIED);
	}
	
	//Convert the parameters to make the WMI call
	CComBSTR bsClassName = className.getCString();
	
	LONG lFlags = 0L;

	//Perform the WMI operation
	hr = pServices->DeleteClass(bsClassName,
							    lFlags,
								NULL,
								NULL);
	if (pServices)
		pServices.Release();

	//Handle the WMI operation result
	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("Failed to delete class [%s]. Error: 0x%X", 255, className.getCString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::deleteClass() - %s", (LPCTSTR)msg);

		switch (hr)
		{
			case WBEM_E_ACCESS_DENIED: throw CIMException(CIM_ERR_ACCESS_DENIED); break;
			case WBEM_E_FAILED: throw CIMException(CIM_ERR_FAILED); break;
			case WBEM_E_INVALID_PARAMETER: throw CIMException(CIM_ERR_FAILED, "WMI Invalid Parameter"); break;
			case WBEM_E_INVALID_CLASS: throw CIMException(CIM_ERR_NOT_FOUND); break;
			case WBEM_E_NOT_FOUND: throw CIMException(CIM_ERR_NOT_FOUND); break;
			case WBEM_E_CLASS_HAS_CHILDREN: throw CIMException(CIM_ERR_CLASS_HAS_CHILDREN); break;
			default: throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
		}
	}

	PEG_METHOD_EXIT();
}
Exemplo n.º 2
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createQualifier  creates a qualifiers 
//                                      
/////////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createQualifier (const WMIQualifier &qualifier, 
                                        IWbemQualifierSet *pQual)
{
    HRESULT hr;
    
    PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createQualifier()");

    String sName = qualifier.getName().getString(); 
    CComBSTR bs = sName.getCString();
    WMIValue value(qualifier.getValue());
    WMIFlavor flavor(qualifier.getFlavor());
    
    CComVariant v;
    value.getAsVariant(&v);

    // key is created using a special call to wmi
    //if (!stricmp("key", ))
    if (String::equalNoCase("key", sName))
    {
        hr = pQual->Put(bs, &v, NULL);
    }
    else
    {
        hr = pQual->Put(bs, &v, flavor.getAsWMIValue());
    }
    v.Clear();
    bs.Empty();

    if (FAILED(hr))
    {
        CMyString msg;
        msg.Format("It is not possible to add the qualifier [%s] to "
            "the object! Error: 0x%X", 255, sName.getCString(), hr);
        
        PEG_TRACE((TRC_WMIPROVIDER, Tracer::LEVEL1, 
            "WmiClassProvider::createQualifier() - %s", (LPCTSTR)msg));

        throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
    }

    PEG_METHOD_EXIT();

    return;
}
Exemplo n.º 3
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createProperty   creates one property 
//                                      doesn't create the qualifiers
/////////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createProperty(const CIMProperty &keyProp, 
                                      IWbemClassObject *pNewClass)
{
    PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createProperty()");

    // create the property
    //Get the CIMTYPE of the parameter
    CIMTYPE type = CIMTypeToWMIType(keyProp.getType());

    //If the property is an array, add CIM_FLAG_ARRAY to CIMType
    if (keyProp.isArray())
    {
        type |= CIM_FLAG_ARRAY;
    }

    // add the property to the class
    CComBSTR bs = keyProp.getName().getString().getCString();
    HRESULT hr = pNewClass->Put(bs, NULL, NULL, type);

    bs.Empty();

    //handle the error, if failed
    if (FAILED(hr))
    {
        CMyString msg;
        msg.Format("Failed to add property [%s]. Error: 0x%X", 255, 
            keyProp.getName().getString().getCString(), hr);

        PEG_TRACE((TRC_WMIPROVIDER, Tracer::LEVEL1, 
                      "WMIClassProvider::createProperty () - %s", 
                      (LPCTSTR)msg));

        throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg); 
    }

    PEG_METHOD_EXIT();

    return;
}
Exemplo n.º 4
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createProperties creates all properties including keys 
//									  add the qualifiers too
// ///////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createProperties(const CIMClass& newClass,
									    IWbemServices *pServices,
										IWbemClassObject *pNewClass)
{
	HRESULT hr;
	
	PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createProperties()");

	// create the properties but don't create the keys again
	CIMProperty prop;

	for (Uint32 i = 0; i < newClass.getPropertyCount(); i++)
	{
		prop = newClass.getProperty(i).clone();

		// create the properties
		try 
		{
			createProperty(prop, pNewClass);
		}
		catch (CIMException&)
		{
			throw;
		}
		
		// get a pointer to work with qualifiers 
		CComPtr<IWbemQualifierSet> pQual;
		CComBSTR bs = prop.getName().getString().getCString();
		
		hr = pNewClass->GetPropertyQualifierSet(bs, &pQual);
		bs.Empty();

		if (FAILED(hr))
		{
			CMyString msg;
			msg.Format("Failed get Qualifier set of [%s]. Error: 0x%X", 255, 
				prop.getName().getString().getCString(), hr);
		
			Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createProperties() - %s", (LPCTSTR)msg);

			if (pQual)
				pQual.Release();
			
			throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg); 
		}

		// set the qualifiers to the property
		for (Uint32 j = 0; j < prop.getQualifierCount(); j++)
		{
			WMIQualifier qualifier(prop.getQualifier(j));
			try 
			{
				createQualifier(qualifier, pQual);
			}
			catch (CIMException&)
			{
				if (pQual)
					pQual.Release();

				throw;
			}
		}

		// set the CLASSORIGIN qualifier if it wasn't set yet
		String strClassorigin = prop.getClassOrigin().getString();
		
		if (strClassorigin.size() == 0)
		{
			strClassorigin = newClass.getClassName().getString();
		}

		WMIFlavor flavor(CIMFlavor::DEFAULTS);
		
		/*
		v.vt = VT_BSTR;
		v.bstrVal = strClassorigin.getCString();
		*/
		CComVariant v;
		v = strClassorigin.getCString();
		
		hr = pQual->Put(L"CLASSORIGIN", &v, flavor.getAsWMIValue());
		v.Clear();

		if (pQual)
			pQual.Release();

		if (FAILED(hr))
		{
			CMyString msg;
			msg.Format("Failed to add CLASSORIGIN qualifier in [%s]. Error: 0x%X", 255, 
				prop.getName().getString().getCString(), hr);

			Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createProperties () - %s", (LPCTSTR)msg);
			
			throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
		}
	}

	PEG_METHOD_EXIT();

	return;
}
Exemplo n.º 5
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createClassNameAndClassQualifiers
//
// ///////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createClassNameAndClassQualifiers(const CIMClass& newClass,
														 IWbemServices *pServices,
														 IWbemClassObject **pNewClass,
														 const bool hasSuperClass)
{
	HRESULT hr;

	PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createClassNameAndClassQualifiers()");

	// if the class has a superclass, we need to spwan a derived
	if (hasSuperClass)
	{
		// get the superclass name
		CComPtr<IWbemClassObject> pSuperClass;
		String tmp = newClass.getSuperClassName().getString();
		CComBSTR bs = tmp.getCString();

		hr = pServices->GetObject(
				bs, 
				NULL, 
				NULL, 
				&pSuperClass, 
				NULL);

		bs.Empty();

		if (FAILED(hr))
		{
			if (pSuperClass)
				pSuperClass.Release();

			CMyString msg;
			msg.Format("Failed to get a pointer to Superclass [%s]. Error: 0x%X", 255, tmp.getCString(), hr);

			Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createClassNameAndClassQualifiers() - %s", (LPCTSTR)msg);

			throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg); 
		}

		//Creates the new class
		pSuperClass->SpawnDerivedClass(NULL, pNewClass);
		if (pSuperClass)
			pSuperClass.Release();
	}
	else
	{
		// we are creating a base class
		hr = pServices->GetObject(NULL, 
								  NULL, 
								  NULL, 
								  pNewClass, 
								  NULL);

		if (FAILED(hr))
		{
			CMyString msg;
			msg.Format("Failed to get a pointer to a new class. Error: 0x%X", hr);

			Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createClassNameAndClassQualifiers() - %s", (LPCTSTR)msg);
			
			throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
		}
	}
	
	// create the class name
	CComVariant v;
	v = newClass.getClassName().getString().getCString();
	hr = (*pNewClass)->Put(L"__CLASS", 0, &v, 0);
	
	v.Clear();

	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("Failed to add class name on class [%s]. Error: 0x%X", 255, 
			newClass.getClassName().getString().getCString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
			          "WMIClassProvider::createClassNameAndClassQualifiers() - %s", (LPCTSTR)msg);

		if (*pNewClass)
			(*pNewClass)->Release();
		
		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

	// get a pointer to work with qualifiers
	CComPtr<IWbemQualifierSet> pNewClassQualifier;
	hr = (*pNewClass)->GetQualifierSet(&pNewClassQualifier);

	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("Failed to get the Qualifier set pointer of class [%s]. Error: 0x%X", 255, 
			newClass.getClassName().getString().getCString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
			          "WMIClassProvider::createClassNameAndClassQualifiers() - %s", (LPCTSTR)msg);
		
		if (*pNewClass)
			(*pNewClass)->Release();

		if (pNewClassQualifier)
			pNewClassQualifier.Release();

		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}
	
	// check the class qualifiers and create them if they are valid
	// we are taking care of the class qualifiers and not methods/properties qualifiers :D
	for (Uint32 i = 0; i < newClass.getQualifierCount(); i++)
	{
		try 
		{
			WMIQualifier qualifier(newClass.getQualifier(i).clone());
			
			createQualifier(qualifier, pNewClassQualifier);
		}
		catch (CIMException&)
		{
			if (*pNewClass)
				(*pNewClass)->Release();

			if (pNewClassQualifier)
				pNewClassQualifier.Release();

			throw;
		}
	}

	if (pNewClassQualifier)
		pNewClassQualifier.Release();

	PEG_METHOD_EXIT();

	return;
}
Exemplo n.º 6
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createClass
//
// ///////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createClass(const String& nameSpace,
								   const String& userName,
								   const String& password,
								   const CIMClass& newClass,
								   Boolean updateClass)
{
	
	PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createClass()");

	setup(nameSpace, userName, password);

	if (!m_bInitialized)
	{
		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3,
			"WMIClassProvider::createClass - m_bInitilized= %x, throw CIM_ERR_FAILED exception",  
			m_bInitialized);

		throw CIMException(CIM_ERR_FAILED);
	}
	
	// Check if the class does not exist and if if has a valid
	// superclass
	performInitialCheck(newClass, updateClass);
	bool hasSuperClass = (newClass.getSuperClassName().getString() != String::EMPTY);

	// gets the pointers
	CComPtr<IWbemServices> pServices;
	CComPtr<IWbemClassObject> pNewClass;

	if (!_collector->Connect(&pServices))
	{
		if (pServices)
			pServices.Release();

		throw CIMException (CIM_ERR_FAILED);
	}

	try 
	{
	    // starts the class creation by name and class qualifiers
		createClassNameAndClassQualifiers(
			newClass, 
			pServices, 
			&pNewClass, 
			hasSuperClass);

		// create properties
		createProperties(
			newClass, 
			pServices, 
			pNewClass);

		// create methods
		createMethods(
			newClass, 
			pServices, 
			pNewClass);
	}
	catch (CIMException&) 
	{
		if (pServices)
			pServices.Release();

		if (pNewClass)
			pNewClass.Release();

		throw;
	}
	
	// Store the new class into WMI
	LONG lFlags = 0L;
	
	//if updateClass is set, we are trying a modifyclass
	if (updateClass) lFlags = WBEM_FLAG_UPDATE_ONLY;

	HRESULT hr = pServices->PutClass(pNewClass, lFlags, NULL, NULL);
	
	if (pServices)
		pServices.Release();
	
	if (pNewClass)
		pNewClass.Release();
	
	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("It is not possible to create the class [%s]. Error: 0x%X", 255, 
					newClass.getClassName().getString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createClass() - %s", (LPCTSTR)msg);

		switch(hr)
		{
			case E_ACCESSDENIED: throw CIMException(CIM_ERR_ACCESS_DENIED); break;
			case WBEM_E_ACCESS_DENIED: throw CIMException(CIM_ERR_ACCESS_DENIED); break;
			case WBEM_E_CLASS_HAS_CHILDREN: throw CIMException(CIM_ERR_CLASS_HAS_CHILDREN); break;
			case WBEM_E_CLASS_HAS_INSTANCES: throw CIMException(CIM_ERR_CLASS_HAS_INSTANCES); break;
			case WBEM_E_NOT_FOUND: throw CIMException(CIM_ERR_NOT_FOUND); break;
			case WBEM_E_INVALID_CLASS: throw CIMException(CIM_ERR_INVALID_PARAMETER); break;
			default: throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
		}
	}

	PEG_METHOD_EXIT();

	return;
}
Exemplo n.º 7
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createParam  create a parameter
//									  
/////////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createParam(const CIMConstParameter &param, 
								   IWbemClassObject *pNewClass)
{
	
	PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createParam()");
	
	//Get the CIMTYPE of the parameter
	CIMTYPE type = CIMTypeToWMIType(param.getType());

	//If the property is an array, add CIM_FLAG_ARRAY to CIMType
	if (param.isArray())
	{
		type |= CIM_FLAG_ARRAY;
	}

	// add the property to the class
	CComBSTR bs = param.getName().getString().getCString();
	HRESULT hr = pNewClass->Put(bs, NULL, NULL, type);

	//handle the error, if failed
	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("It is not possible to add parameter [%s] to the parameters list! Error: 0x%X", 255, 
			param.getName().getString().getCString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
					  "WMIClassProvider::createParam() - %s", (LPCTSTR)msg);

		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

	// create the qualifiers for this parameter
	// get a pointer to work with qualifiers 
	CComPtr<IWbemQualifierSet> pQual;
	hr = pNewClass->GetPropertyQualifierSet(bs, &pQual);
	
	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("It is not possible to get a qualifier set for parameter [%s]! Error: 0x%X", 255, 
			param.getName().getString().getCString(), hr);

		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
					  "WMIClassProvider::createParam() - %s", (LPCTSTR)msg);

		if (pQual)
			pQual.Release();
		
		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

	// create the qualifiers for this parameter
	for (Uint32 i = 0; i < param.getQualifierCount(); i++)
	{
		CIMQualifier cimQual = param.getQualifier(i).clone();
		WMIQualifier qualifier(cimQual);

		try 
		{
			createQualifier(qualifier, pQual);
		}
		catch (CIMException&)
		{
			if (pQual)
				pQual.Release();

			throw;
		}
	}
	
	if (pQual)
		pQual.Release();

	PEG_METHOD_EXIT();

	return;
}
Exemplo n.º 8
0
/////////////////////////////////////////////////////////////////////////////
// WMIClassProvider::createMethod  create a method
//									  
/////////////////////////////////////////////////////////////////////////////
void WMIClassProvider::createMethod (CIMConstMethod &method,
									 IWbemServices *pServices,
									 IWbemClassObject *pNewClass)
{
	PEG_METHOD_ENTER(TRC_WMIPROVIDER, "WmiClassProvider::createMethod()");
	
	// the parameters
	HRESULT hr = S_OK;
	CComPtr<IWbemClassObject> pinParameters;
	CComPtr<IWbemClassObject> poutParameters;

	// Get pointers to use for in & out params:
    hr = pServices->GetObject(L"__PARAMETERS",
					          NULL, 
							  NULL, 
							  &pinParameters, 
							  NULL);
	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("Failed to get a paramter pointer while creating method: %s! Error: 0x%X",
					255, method.getName().getString().getCString(), hr);
		
		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
					  "WMIClassProvider::createMethod() - %s", (LPCTSTR)msg);

        if (pinParameters)
            pinParameters.Release();
        if (poutParameters)
            poutParameters.Release();

        throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

	// Get pointers to use for in & out params:
    hr = pServices->GetObject(L"__PARAMETERS",
					          NULL, 
							  NULL, 
							  &poutParameters, 
							  NULL);

	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("Failed to get a paramter pointer while creating method: %s! Error: 0x%X",
					255, method.getName().getString().getCString(), hr);
		
		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
					  "WMIClassProvider::createMethod() - %s", (LPCTSTR)msg);

        if (pinParameters)
            pinParameters.Release();
        if (poutParameters)
            poutParameters.Release();

        throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

    // create the parameters
	for (Uint32 i = 0; i < method.getParameterCount(); i++)
	{
		CIMConstParameter param;
		param = method.getParameter(i);

		// Is this an in or out parameter, or both?
		if (param.findQualifier(CIMName("in")) != -1)
		{
            try 
            {
                createParam(param, pinParameters);
            }
            catch (CIMException&)
            {
                if (pinParameters)
                    pinParameters.Release();
                if (poutParameters)
                    poutParameters.Release();

                throw;
            }		
        } 
		
        if (param.findQualifier(CIMName("out")) != -1)
		{
            try 
            {
                createParam(param, poutParameters);
            }
            catch (CIMException&)
            {
                if (pinParameters)
                    pinParameters.Release();
                if (poutParameters)
                    poutParameters.Release();

                throw;
            }		
        }
	}

	// create the method
	CComBSTR bs = method.getName().getString().getCString();
	hr = pNewClass->PutMethod(bs, NULL, pinParameters, poutParameters);

	if (pinParameters)
		pinParameters.Release();
	
	if (poutParameters)
		poutParameters.Release();

	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("It is not possible to add the method [%s] ! Error: 0x%X", 255, 
			method.getName().getString().getCString(), hr);
			
		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
					  "WMIClassProvider::createMethod() - %s", (LPCTSTR)msg);
		
		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg); 
	}

	
	// create the qualifiers for the method
	// get a pointer to work with qualifiers 
	CComPtr<IWbemQualifierSet> pQual;
	hr = pNewClass->GetMethodQualifierSet(bs, &pQual);

	if (FAILED(hr))
	{
		CMyString msg;
		msg.Format("It is not possible to get the qualifier set of the method [%s] ! Error: 0x%X", 255, 
			method.getName().getString().getCString(), hr);
			
		Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3, 
						  "WMIClassProvider::createMethod() - %s", (LPCTSTR)msg);
		
		if (pQual)
			pQual.Release();
		
		throw CIMException(CIM_ERR_FAILED, (LPCTSTR)msg);
	}

	// create the qualifiers for the method
	for (Uint32 i = 0; i < method.getQualifierCount(); i++)
	{
		CIMQualifier cimQual = method.getQualifier(i).clone();
		WMIQualifier qualifier(cimQual);

		try 
		{
			createQualifier(qualifier, pQual);
		}
		catch (CIMException&)
		{
			if (pQual)
				pQual.Release();

			throw;
		}
	}

	if (pQual)
		pQual.Release();
	
	PEG_METHOD_EXIT();

	return;
}
Exemplo n.º 9
0
//////////////////////////////////////////////////////////////////////////////
// WMIBaseProvider::getQueryString - builds the query string from the
//		input parameters for Associator and Reference commands
//
// ///////////////////////////////////////////////////////////////////////////
String WMIBaseProvider::getQueryString(const CIMObjectPath &objectName,
		const String &sQueryCommand,							   
		const String &assocClass, 
		const String &resultClass, 
		const String &role,
		const String &resultRole)
{
	bool hasWHERE = false;
	bool isInst;

	//first we need to get the object name
	String sObjName = getObjectName(objectName);

	// check if is an instance name
	Uint32 pos = sObjName.find(qString(Q_PERIOD));
	isInst = (PEG_NOT_FOUND != pos);

	CMyString sQuery;
	sQuery.Format(CMyString(sQueryCommand), 128, CMyString(sObjName));

	//set up any optional parameters
	if (!((0 == assocClass.size()) && (0 == resultClass.size()) &&
		  (0 == role.size()) && (0 == resultRole.size())))
	{	
		// we have optional parameters, append the appropriate ones
		sQuery += qChar(Q_WHERE);
		hasWHERE = true;

		if (0 != assocClass.size())
		{
			sQuery += qChar(Q_ASSOC_CLS);
			sQuery += assocClass;
		}

		if (0 != resultClass.size())
		{
			sQuery += qChar(Q_RESULT_CLASS);
			sQuery += resultClass;
		}

		if (0 != role.size())
		{
			sQuery += qChar(Q_ROLE);
			sQuery += role;
		}

		if (0 != resultRole.size())
		{
			sQuery += qChar(Q_RESULT_ROLE);
			sQuery += resultRole;
		}
	}

	// check if an instance
	if (!isInst)
	{
		// have a class, add "SchemaOnly"
		if (!hasWHERE)
		{
			sQuery += qChar(Q_WHERE);
		}

		sQuery += qChar(Q_SCHEMA);
	}

	Tracer::trace(TRC_WMIPROVIDER, Tracer::LEVEL3,
		"WMIBaseProvider::getQueryString() - Query is %s", (LPCTSTR)sQuery); 

	String s = (LPCTSTR)sQuery;
	return s;
}