Source code of Windows XP (NT5)
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//***************************************************************************
//
// Copyright (c) 1998-2000 Microsoft Corporation
//
// PROPERTY.CPP
//
// alanbos 15-Aug-96 Created.
//
// Defines the implementation of ISWbemProperty
//
//***************************************************************************
#include "precomp.h"
//***************************************************************************
//
// CSWbemProperty::CSWbemProperty
//
// DESCRIPTION:
//
// Constructor.
//
//***************************************************************************
CSWbemProperty::CSWbemProperty(
CSWbemServices *pService,
ISWbemInternalObject *pSWbemObject,
BSTR name)
{
m_Dispatch.SetObj (this, IID_ISWbemProperty,
CLSID_SWbemProperty, L"SWbemProperty");
m_cRef=1;
m_pSWbemObject = pSWbemObject;
m_pSWbemObject->AddRef ();
m_pSWbemObject->GetIWbemClassObject (&m_pIWbemClassObject);
m_pSite = new CWbemObjectSite (m_pSWbemObject);
m_pSWbemServices = pService;
if (m_pSWbemServices)
m_pSWbemServices->AddRef ();
m_name = SysAllocString (name);
InterlockedIncrement(&g_cObj);
}
//***************************************************************************
//
// CSWbemProperty::~CSWbemProperty
//
// DESCRIPTION:
//
// Destructor.
//
//***************************************************************************
CSWbemProperty::~CSWbemProperty(void)
{
InterlockedDecrement(&g_cObj);
if (m_pSWbemObject)
m_pSWbemObject->Release ();
if (m_pIWbemClassObject)
m_pIWbemClassObject->Release ();
if (m_pSWbemServices)
m_pSWbemServices->Release ();
if (m_pSite)
m_pSite->Release ();
SysFreeString (m_name);
}
//***************************************************************************
// HRESULT CSWbemProperty::QueryInterface
// long CSWbemProperty::AddRef
// long CSWbemProperty::Release
//
// DESCRIPTION:
//
// Standard Com IUNKNOWN functions.
//
//***************************************************************************
STDMETHODIMP CSWbemProperty::QueryInterface (
IN REFIID riid,
OUT LPVOID *ppv
)
{
*ppv=NULL;
if (IID_IUnknown==riid)
*ppv = reinterpret_cast<IUnknown*>(this);
else if (IID_ISWbemProperty==riid)
*ppv = (ISWbemProperty *)this;
else if (IID_IDispatch==riid)
*ppv = (IDispatch *)this;
else if (IID_ISupportErrorInfo==riid)
*ppv = (ISupportErrorInfo *)this;
else if (IID_IProvideClassInfo==riid)
*ppv = (IProvideClassInfo *)this;
if (NULL!=*ppv)
{
((LPUNKNOWN)*ppv)->AddRef();
return NOERROR;
}
return ResultFromScode(E_NOINTERFACE);
}
STDMETHODIMP_(ULONG) CSWbemProperty::AddRef(void)
{
InterlockedIncrement(&m_cRef);
return m_cRef;
}
STDMETHODIMP_(ULONG) CSWbemProperty::Release(void)
{
InterlockedDecrement(&m_cRef);
if (0L!=m_cRef)
return m_cRef;
delete this;
return 0;
}
//***************************************************************************
// HRESULT CSWbemProperty::InterfaceSupportsErrorInfo
//
// DESCRIPTION:
//
// Standard Com ISupportErrorInfo functions.
//
//***************************************************************************
STDMETHODIMP CSWbemProperty::InterfaceSupportsErrorInfo (IN REFIID riid)
{
return (IID_ISWbemProperty == riid) ? S_OK : S_FALSE;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_Value
//
// DESCRIPTION:
//
// Retrieve the property value
//
// PARAMETERS:
//
// pValue holds the value on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_Value (
VARIANT *pValue
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == pValue)
hr = WBEM_E_INVALID_PARAMETER;
else
{
VariantClear (pValue);
if (m_pIWbemClassObject)
{
VARIANT var;
VariantInit (&var);
if (WBEM_S_NO_ERROR == (hr = m_pIWbemClassObject->Get
(m_name, 0, &var, NULL, NULL)))
{
MapFromCIMOMObject(m_pSWbemServices, &var,
m_pSWbemObject, m_name);
if(var.vt & VT_ARRAY)
{
hr = ConvertArrayRev(pValue, &var);
}
else
{
hr = VariantCopy (pValue, &var);
}
VariantClear(&var);
}
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::put_Value
//
// DESCRIPTION:
//
// Set the property value
//
// PARAMETERS:
//
// pVal the new value
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::put_Value (
VARIANT *pVal
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
/*
* We can only _change_ the value, not the type. When dealing with
* CIMOM interfaces 2 golden rules must be obeyed.
* (1) For instance-level Put's, you can specify the CIMTYPE (provided
* you get it right), but can also specify 0.
* (2) For class-level Put's, always specify the CIMTYPE
*/
if (m_pIWbemClassObject)
{
CIMTYPE cimType = CIM_EMPTY;
if (SUCCEEDED(hr = m_pIWbemClassObject->Get (m_name, 0, NULL, &cimType, NULL)))
{
VARIANT vWMI;
VariantInit (&vWMI);
if (SUCCEEDED(WmiVariantChangeType(vWMI, pVal, cimType)))
hr = m_pIWbemClassObject->Put (m_name, 0, &vWMI, cimType);
VariantClear (&vWMI);
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
else
{
// Did we save an embedded object value? If so make sure the
// site is correctly set to this property.
SetSite (pVal, m_pSWbemObject, m_name);
// Propagate the change to the owning site
if (m_pSite)
m_pSite->Update ();
}
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_Name
//
// DESCRIPTION:
//
// Retrieve the property name
//
// PARAMETERS:
//
// pName holds the name on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_Name (
BSTR *pName
)
{
HRESULT hr = WBEM_S_NO_ERROR;
ResetLastErrors ();
if (NULL == pName)
hr = WBEM_E_INVALID_PARAMETER;
else
*pName = SysAllocString (m_name);
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_CIMType
//
// DESCRIPTION:
//
// Retrieve the property base CIM type (i.e. without the array type)
//
// PARAMETERS:
//
// pType holds the type on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_CIMType (
WbemCimtypeEnum *pType
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == pType)
return WBEM_E_INVALID_PARAMETER;
if (m_pIWbemClassObject)
{
CIMTYPE cimType;
hr = m_pIWbemClassObject->Get (m_name, 0, NULL, &cimType, NULL);
*pType = (WbemCimtypeEnum)(cimType & ~CIM_FLAG_ARRAY);
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_IsArray
//
// DESCRIPTION:
//
// Retrieve whether the property is an array type
//
// PARAMETERS:
//
// pIsArray holds the value on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_IsArray (
VARIANT_BOOL *pIsArray
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == pIsArray)
return WBEM_E_INVALID_PARAMETER;
*pIsArray = FALSE;
if (m_pIWbemClassObject)
{
CIMTYPE cimType = CIM_EMPTY;
hr = m_pIWbemClassObject->Get (m_name, 0, NULL, &cimType, NULL);
*pIsArray = (0 != (cimType & CIM_FLAG_ARRAY))
? VARIANT_TRUE : VARIANT_FALSE;
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_IsLocal
//
// DESCRIPTION:
//
// Retrieve the property flavor
//
// PARAMETERS:
//
// pFlavor holds the flavor on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_IsLocal (
VARIANT_BOOL *pValue
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == pValue)
hr = WBEM_E_INVALID_PARAMETER;
else
{
long flavor = 0;
if (m_pIWbemClassObject)
{
if (WBEM_S_NO_ERROR == (hr = m_pIWbemClassObject->Get (m_name, 0, NULL, NULL, &flavor)))
*pValue = (WBEM_FLAVOR_ORIGIN_LOCAL == (flavor & WBEM_FLAVOR_MASK_ORIGIN)) ?
VARIANT_TRUE : VARIANT_FALSE;
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_Origin
//
// DESCRIPTION:
//
// Retrieve the property origin
//
// PARAMETERS:
//
// pOrigin holds the origin class on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_Origin (
BSTR *pOrigin
)
{
HRESULT hr = WBEM_S_NO_ERROR;
ResetLastErrors ();
if (NULL == pOrigin)
hr = WBEM_E_INVALID_PARAMETER;
else
{
if (m_pIWbemClassObject)
m_pIWbemClassObject->GetPropertyOrigin (m_name, pOrigin);
if (NULL == *pOrigin)
*pOrigin = SysAllocString (OLESTR(""));
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::get_Qualifiers_
//
// DESCRIPTION:
//
// Retrieve the property qualifier set
//
// PARAMETERS:
//
// ppQualSet addresses the qualifier set on return
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::get_Qualifiers_ (
ISWbemQualifierSet **ppQualSet
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == ppQualSet)
hr = WBEM_E_INVALID_PARAMETER;
else
{
*ppQualSet = NULL;
if (m_pIWbemClassObject)
{
IWbemQualifierSet *pQualSet = NULL;
if (WBEM_S_NO_ERROR == (hr = m_pIWbemClassObject->GetPropertyQualifierSet
(m_name, &pQualSet)))
{
if (!(*ppQualSet = new CSWbemQualifierSet (pQualSet, m_pSWbemObject)))
hr = WBEM_E_OUT_OF_MEMORY;
pQualSet->Release ();
}
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemProperty::UpdateEmbedded
//
// DESCRIPTION:
//
// Given a variant representing an embedded value, set the value
// and update the parent object.
//
// PARAMETERS:
//
// var embedded value (VT_UNKNOWN)
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
void CSWbemProperty::UpdateEmbedded (VARIANT &vNewVal, long index)
{
if (m_pIWbemClassObject)
{
CIMTYPE cimType = CIM_EMPTY;
if (-1 == index)
{
m_pIWbemClassObject->Get (m_name, 0, NULL, &cimType, NULL);
m_pIWbemClassObject->Put (m_name, 0, &vNewVal, cimType);
}
else
{
VARIANT vPropVal;
VariantInit(&vPropVal);
if (SUCCEEDED (m_pIWbemClassObject->Get (m_name, 0, &vPropVal, &cimType, NULL))
&& ((VT_UNKNOWN|VT_ARRAY) == V_VT(&vPropVal)))
{
// Set the value into the relevant index of the property value array
if (S_OK == SafeArrayPutElement (vPropVal.parray, &index, V_UNKNOWN(&vNewVal)))
{
// Set the entire property value
m_pIWbemClassObject->Put (m_name, 0, &vPropVal, cimType);
}
}
VariantClear (&vPropVal);
}
}
}
void CSWbemProperty::UpdateSite ()
{
// Update the parent site if it exists
if (m_pSite)
m_pSite->Update ();
}
//***************************************************************************
//
// SCODE CSWbemProperty::CPropertyDispatchHelp::HandleError
//
// DESCRIPTION:
//
// Provide bespoke handling of error conditions in the bolierplate
// Dispatch implementation.
//
// PARAMETERS:
//
// dispidMember, wFlags,
// pdispparams, pvarResult,
// puArgErr, All passed directly from IDispatch::Invoke
// hr The return code from the bolierplate invoke
//
// RETURN VALUES:
// The new return code (to be ultimately returned from Invoke)
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemProperty::CPropertyDispatchHelp::HandleError (
DISPID dispidMember,
unsigned short wFlags,
DISPPARAMS FAR* pdispparams,
VARIANT FAR* pvarResult,
UINT FAR* puArgErr,
HRESULT hr
)
{
if ((DISPID_VALUE == dispidMember) && (DISP_E_NOTACOLLECTION == hr) && (pdispparams->cArgs > 0))
{
/*
* We are looking for calls on the default member (the Value property) which
* supplied an argument. Since the Value property is of type VARIANT, this may
* be legal but undetectable by the standard Dispatch mechanism, because in the
* the case that the property happens to be an array type, it is meaningful to
* pass an index (the interpretation is that the index specifies an offset in
* the VT_ARRAY|VT_VARIANT structure that represents the property value).
*/
WbemCimtypeEnum cimtype;
VARIANT_BOOL isArray = FALSE;
ISWbemProperty *pProperty = NULL;
// This tells use where to expect the array index to appear in the argument list
UINT indexArg = (DISPATCH_PROPERTYGET & wFlags) ? 0 : 1;
if (SUCCEEDED (m_pObj->QueryInterface (IID_ISWbemProperty, (PPVOID) &pProperty)))
{
if (SUCCEEDED(pProperty->get_CIMType (&cimtype)) &&
SUCCEEDED(pProperty->get_IsArray (&isArray)) && (isArray))
{
// Extract the current property value
VARIANT vPropVal;
VariantInit(&vPropVal);
if (SUCCEEDED (pProperty->get_Value (&vPropVal)) && V_ISARRAY(&vPropVal))
{
VARIANT indexVar;
VariantInit (&indexVar);
// Attempt to coerce the index argument into a value suitable for an array index
if (S_OK == VariantChangeType (&indexVar, &pdispparams->rgvarg[indexArg], 0, VT_I4))
{
long lArrayPropInx = V_I4(&indexVar);
// Is this a Get? There should be one argument (the array index)
if (DISPATCH_PROPERTYGET & wFlags)
{
if (1 == pdispparams->cArgs)
{
// We should have a VT_ARRAY|VT_VARIANT value at this point; extract the
// VARIANT element we require
VariantInit (pvarResult);
hr = SafeArrayGetElement (vPropVal.parray, &lArrayPropInx, pvarResult);
}
else
hr = DISP_E_BADPARAMCOUNT;
}
else if (DISPATCH_PROPERTYPUT & wFlags)
{
if (2 == pdispparams->cArgs)
{
/*
* Try to interpret this as an array member set operation. For
* this the first argument passed is the new value, and the second
* is the array index.
*/
VARIANT vNewVal;
VariantInit(&vNewVal);
if (SUCCEEDED(VariantCopy(&vNewVal, &pdispparams->rgvarg[0])))
{
// Coerce the value if necessary (unless it's embedded)
if ((wbemCimtypeObject == cimtype) ||
(S_OK == VariantChangeType (&vNewVal, &vNewVal, 0, CimTypeToVtType (cimtype))))
{
// Check the index is not out of bounds and, if it is, grow
// the array accordingly
CheckArrayBounds (vPropVal.parray, lArrayPropInx);
// Set the value into the relevant index of the property value array
if (S_OK == (hr =
SafeArrayPutElement (vPropVal.parray, &lArrayPropInx, &vNewVal)))
{
// Set the entire property value
if (SUCCEEDED (pProperty->put_Value (&vPropVal)))
{
hr = S_OK;
// Upcast is OK here because m_pObj is really a (CSWbemProperty*)
CSWbemProperty *pSProperty = (CSWbemProperty *)m_pObj;
// Did we save an embedded object value? If so make sure the
// site is correctly set to this property.
SetSite (&pdispparams->rgvarg[0],
pSProperty->m_pSWbemObject, pSProperty->m_name,
lArrayPropInx);
// Propagate the change to the owning site
pSProperty->UpdateSite ();
}
else
{
hr = DISP_E_TYPEMISMATCH;
if (puArgErr)
*puArgErr = 0;
}
}
}
else
{
hr = DISP_E_TYPEMISMATCH;
if (puArgErr)
*puArgErr = 0;
}
VariantClear (&vNewVal);
}
}
else
hr = DISP_E_BADPARAMCOUNT;
}
}
else
{
hr = DISP_E_TYPEMISMATCH;
if (puArgErr)
*puArgErr = indexArg;
}
VariantClear (&indexVar);
}
VariantClear (&vPropVal);
}
pProperty->Release ();
}
}
return hr;
}