internal static void ProcessJsonTraverseAction(FanoutSearchDescriptor fs_desc, JObject queryObject, int i, int len, string element_str)
{
List <long> cell_ids = null;
bool is_cell_id = TryParseLongList(element_str, out cell_ids);
bool is_origin = (i == 0);
bool is_last = (i == len - 1 || i == len - 2);
List <string> selectedFields = new List <string>();
if (is_cell_id)
{
if (is_origin)
{
fs_desc.m_origin = cell_ids;
}
else
{
if (is_last) /* The last node, action set to return */
{
fs_desc.AddTraverseStep(ExpressionBuilder.GenerateTraverseActionFromCellIds(Action.Return, cell_ids), null);
}
else /* Intermediate node, action set to continue */
{
fs_desc.AddTraverseStep(ExpressionBuilder.GenerateTraverseActionFromCellIds(Action.Continue, cell_ids), null);
}
}
}
else
{
dynamic action_object = queryObject[element_str];
ProcessJsonSelectField(selectedFields, action_object);
if (is_origin)
{
ProcessJsonOriginNodeObject(fs_desc, action_object);
}
else /* not origin */
{
ProcessJsonNonOriginNodeObject(fs_desc, is_last, action_object);
}
}
fs_desc.m_selectFields.Add(selectedFields);
}
private static void ProcessJsonNonOriginNodeObject(FanoutSearchDescriptor fs_desc, bool is_last, dynamic action_object)
{
Expression <Func <ICellAccessor, Action> > traverse_action = null;
Action default_action = is_last ? Action.Return : Action.Continue;
traverse_action = ExpressionBuilder.GenerateTraverseActionFromQueryObject(action_object, default_action);
if (traverse_action != null)
{
fs_desc.AddTraverseStep(traverse_action, null);
}
else
{
/* either user didn't specify node desc, or node desc doesn't imply traverse action */
if (is_last)
{
fs_desc.AddTraverseStep(_ => Action.Return, null);
}
else
{
fs_desc.AddTraverseStep(_ => Action.Continue, null);
}
}
}
internal static void ProcessJsonQueryObject(FanoutSearchDescriptor fs_desc, string queryPath, JObject queryObject)
{
string[] path_elements = queryPath.Split(s_url_path_separator, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0, len = path_elements.Length; i != len; ++i)
{
var element_str = path_elements[i];
if (0 == (i % 2)) /* Node */
{
ProcessJsonTraverseAction(fs_desc, queryObject, i, len, element_str);
}
else /* Edge */
{
ProcessJsonEdgeTypeDescriptor(fs_desc, element_str);
}
}
if (0 == path_elements.Length % 2) /* There's no final node desc. Add a return command. */
{
fs_desc.AddTraverseStep(_ => Action.Return, null);
}
}