public SearchNodeList Parse()
{
var ret = new SearchNodeList();
if (!(this.Source == ""))
{
string[] parts = this.Source.Split('/');
const string NO_INDEX = @"^(\*|[a-z]+)$";
const string WITH_INDEX = @"^(\*|[a-z]+)\[[0-9]+\]$";
const string WITH_NAME = @"^(\*|[a-z]+)\[.+\]$";
foreach (var part in parts)
{
if (Regex.IsMatch(part, NO_INDEX))
{
ret.Add(new SearchNode(this.KeywordToEnum(part)));
}
else if (Regex.IsMatch(part, WITH_INDEX))
{
var _open = part.IndexOf('[');
var _close = part.IndexOf(']');
var index_string = part.Substring(_open + 1, _close - (_open + 1)).Trim();
var index = int.Parse(index_string);
ret.Add(new SearchNode(this.KeywordToEnum(part.Substring(0, _open)), index));
}
else if (Regex.IsMatch(part, WITH_NAME))
{
var _open = part.IndexOf('[');
var _close = part.IndexOf(']');
var name = part.Substring(_open + 1, _close - (_open + 1)).Trim();
ret.Add(new SearchNode(this.KeywordToEnum(part.Substring(0, _open)), name));
}
else
{
throw new Exception("Query expression contains errors.");
}
}
}
return(ret);
}
public Node GetChild(params SearchNode[] parsed_search_expression)
{
if (parsed_search_expression.Length == 0)
{
return(null);
}
else if (parsed_search_expression.Length == 1)
{
return(this.GetNodeByType(parsed_search_expression[0]));
}
else
{
var rest_parts = new SearchNodeList();
rest_parts.AddRange(parsed_search_expression);
var first_part = rest_parts[0];
rest_parts.RemoveAt(0);
var first_result = this.GetNodeByType(first_part);
if (first_result == null)
{
return(null);
}
return(first_result.GetChild(rest_parts.ToArray()));
}
}
