NetBase.Sql.QueryBuilder.JoinClause C# (CSharp) Method

        private void JoinClause()
        {
            // Large set of defaults for joins.
            // This is where we start to think about moving some
            // parsing into the individual elements, esp. since
            // the responsibility for executing the query is
            // delegated to the executive.
            do
            {
                Join j = null;
                Join.OrientationType orientation = Join.OrientationType.Left;

                if (tokenizer.Token == "LEFT")
                {
                    orientation = Join.OrientationType.Left;
                    tokenizer.Match("LEFT");
                }

                if (tokenizer.Token == "RIGHT")
                {
                    orientation = Join.OrientationType.Right;
                    tokenizer.Match("RIGHT");
                }

                if (tokenizer.Token == "JOIN")
                {
                    tokenizer.Match("JOIN");
                    j = new InnerJoin();
                }

                if (tokenizer.Token == "INNER")
                {
                    tokenizer.Match("INNER");
                    tokenizer.Match("JOIN");
                    j = new InnerJoin();
                }

                if (tokenizer.Token == "OUTER")
                {
                    tokenizer.Match("OUTER");
                    tokenizer.Match("JOIN");
                    j = new OuterJoin();
                }

                j.Orientation = orientation;
                j.TableName = tokenizer.Token;
                tokenizer.GetToken();

                tokenizer.Match("ON");
                j.LeftField = tokenizer.Token;
                tokenizer.GetToken();
                tokenizer.Match("=");
                j.RightField = tokenizer.Token;
                tokenizer.GetToken();
                ((SelectQuery)this.Query).Joins.Add(j);
            } while (tokenizer.Token == "JOIN" ||
                    tokenizer.Token == "LEFT" ||
                    tokenizer.Token == "RIGHT" ||
                    tokenizer.Token == "INNER" ||
                    tokenizer.Token == "OUTER");
        }