HRESULT BthLEDevice::GetObjectIDsByFormat(
ACCESS_SCOPE Scope,
REFGUID guidObjectFormat,
_In_ LPCWSTR wszParentObjectID,
const DWORD dwDepth,
_Inout_ IPortableDevicePropVariantCollection* pObjectIDs)
{
HRESULT hr = S_OK;
AbstractDeviceContent* pContent = NULL;
if(pObjectIDs == NULL)
{
hr = E_POINTER;
CHECK_HR(hr, ("Cannot have NULL parameter"));
return hr;
}
hr = GetContent(Scope, wszParentObjectID, &pContent);
CHECK_HR(hr, "Failed to get content '%ws'", wszParentObjectID);
if (hr == S_OK)
{
hr = pContent->GetObjectIDsByFormat(Scope, guidObjectFormat, dwDepth, pObjectIDs);
CHECK_HR(hr, "Failed to get object IDs by format");
}
return hr;
}
HRESULT AbstractDeviceContent::GetObjectIDsByFormat(
ACCESS_SCOPE Scope,
REFGUID guidFormat,
const DWORD dwDepth,
_Inout_ IPortableDevicePropVariantCollection* pObjectIDs)
{
HRESULT hr = S_OK;
CComCritSecLock<CComAutoCriticalSection> Lock(m_ChildrenCS);
if (CanAccess(Scope))
{
DWORD dwIndex = 0;
AbstractDeviceContent* pChild = NULL;
if (Format == guidFormat || guidFormat == WPD_OBJECT_FORMAT_ALL)
{
PROPVARIANT pv = {0};
PropVariantInit(&pv);
pv.vt = VT_LPWSTR;
pv.pwszVal = ObjectID.GetBuffer();
hr = pObjectIDs->Add(&pv);
CHECK_HR(hr, "Failed to add '%ws' to the list of object IDs by format", ObjectID);
}
if (dwDepth > 0)
{
while ((hr == S_OK) && (FindNext(Scope, dwIndex, &pChild)))
{
hr = pChild->GetObjectIDsByFormat(Scope, guidFormat, dwDepth-1, pObjectIDs);
CHECK_HR(hr, "Failed to get object IDs by format for child at index %d", dwIndex);
dwIndex++;
}
}
}
else
{
hr = E_ACCESSDENIED;
}
return hr;
}
