public object Deserialize(PropertyMapping prop, string memberName, object existing = null)
{
if (prop == null)
{
throw Error.ArgumentNull("prop");
}
if (existing != null && !(existing is IList))
{
throw Error.Argument("existing", "Can only read repeating elements into a type implementing IList");
}
IList result = existing as IList;
bool overwriteMode;
IEnumerable <IFhirReader> elements;
if (_current.CurrentToken == TokenType.Array) // Json has members that are arrays, if we encounter multiple, update the old values of the array
{
overwriteMode = result != null && result.Count > 0;
elements = _current.GetArrayElements();
}
else if (_current.CurrentToken == TokenType.Object) // Xml has repeating members, so this results in an "array" of just 1 member
{
//TODO: This makes member : {x} in Json valid too,
//even if json should have member : [{x}]
overwriteMode = false;
elements = new List <IFhirReader>()
{
_current
};
}
else
{
throw Error.Format("Expecting to be either at a repeating complex element or an array when parsing a repeating member.", _current);
}
if (result == null)
{
result = ReflectionHelper.CreateGenericList(prop.ElementType);
}
var position = 0;
foreach (var element in elements)
{
var reader = new DispatchingReader(element, arrayMode: true);
if (overwriteMode)
{
if (position >= result.Count)
{
throw Error.Format("The value and extension array are not well-aligned", _current);
}
// Arrays may contain null values as placeholders
if (element.CurrentToken != TokenType.Null)
{
result[position] = reader.Deserialize(prop, memberName, existing: result[position]);
}
}
else
{
object item = null;
if (element.CurrentToken != TokenType.Null)
{
item = reader.Deserialize(prop, memberName);
}
else
{
item = null; // Arrays may contain null values as placeholders
}
result.Add(item);
}
position++;
}
return(result);
}