private IEnumerable <KeyValuePair <string, object> > EnumerateKeyValuePairs(
Hashtable sourceRow,
NullValueHandling nullValueHandling,
IEnumerable <string> keysToProcess,
Dictionary <string, object> descriptorNamespaceByKey,
HashSet <string> selectedKeys)
{
foreach (string key in keysToProcess)
{
string renamedKey = null;
// Handle Pass through values
if (key.EndsWith(CompositeDefinitionHelper.PassThroughMarker))
{
renamedKey = key.TrimSuffix(CompositeDefinitionHelper.PassThroughMarker);
yield return(new KeyValuePair <string, object>(renamedKey ?? key, sourceRow[key]));
}
else
{
// Remove null values, if appropriate
object value;
if (sourceRow[key] == null)
{
if (nullValueHandling == NullValueHandling.Include)
{
value = sourceRow[key];
}
else
{
continue;
}
}
else
{
if (descriptorNamespaceByKey.TryGetValue(key, out object namespaceForDescriptor))
{
value =
EdFiDescriptorReferenceSpecification.GetFullyQualifiedDescriptorReference(
namespaceForDescriptor.ToString(),
sourceRow[key]
.ToString());
}
else
{
// See if we need to convert an USI to a UniqueId
if (UniqueIdSpecification.IsUSI(key) &&
UniqueIdSpecification.TryGetUSIPersonTypeAndRoleName(key, out string personType, out string roleName))
{
// Translate to UniqueId
string uniqueId = _personUniqueIdToUsiCache.GetUniqueId(personType, (int)sourceRow[key]);
string uniqueIdKey = (roleName + personType + CompositeDefinitionHelper.UniqueId).ToCamelCase();
renamedKey = uniqueIdKey;
value = uniqueId;
}