public static QueryTermNode ParseUserQuery(QueryFieldSet field_set, string token)
{
var term = new QueryTermNode();
// See if the query specifies a field, and if so, pull out the operator as well
var field_alias = field_set.FindAlias(token);
if (field_alias != null)
{
term.Field = field_set [field_alias];
foreach (var val in term.Field.CreateQueryValues())
{
term.Value = val;
var op_alias = term.Value.OperatorSet.FindAlias(token);
if (op_alias != null)
{
term.Operator = term.Value.OperatorSet [op_alias];
var field_separator = token.IndexOf(op_alias);
var temp = token.Substring(field_separator + op_alias.Length);
term.Value.ParseUserQuery(temp);
if (!term.Value.IsEmpty)
{
break;
}
}
term.Operator = null;
term.Value = null;
}
}
if (term.Value == null)
{
term.Field = null;
term.Value = QueryValue.CreateFromUserQuery(token, term.Field);
term.Operator = StringQueryValue.Contains;
}
return(term);
}
