Class: FluentQuery::Drivers::Shared::Tokens::SQL::Join

Inherits:
FluentQuery::Drivers::Shared::Tokens::SQLToken show all
Defined in:
lib/fluent-query/drivers/shared/tokens/sql/join.rb

Overview

Generic SQL query [LEFT|RIGHT|INNER|OUTER] JOIN token.

Constant Summary

Constants inherited from FluentQuery::Drivers::Shared::Tokens::SQLToken

FluentQuery::Drivers::Shared::Tokens::SQLToken::TRANSFORMER

Instance Method Summary collapse

Methods inherited from FluentQuery::Drivers::Shared::Tokens::SQLToken

#initialize

Constructor Details

This class inherits a constructor from FluentQuery::Drivers::Shared::Tokens::SQLToken

Instance Method Details

#render!(mode = :build) ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/fluent-query/drivers/shared/tokens/sql/join.rb', line 22

def render!(mode = :build)
    stack = [ ]
    unknown = [ ]

    _class = self.unknown_token
    processor = @_query.processor
    result = ""

    @_subtokens.each do |token|
        arguments = token.arguments

        # JOIN token
        if token.name == :join
        
            original_name = token.original_name
            stack << self._transform_token(original_name.to_s)
    
            ##
            
            length = arguments.length
            first = arguments.first
            
            if length > 0
                if first.symbol?
                    stack << processor.process_identifiers(arguments)
                elsif (length > 1) or (first.string?)
                    stack << processor.process_formatted(arguments, mode)
                elsif first.hash?
                    t_name = first.keys.first
                    t_alias = first.values.first
                    stack << (processor.quote_identifier(t_name) + " AS " + processor.quote_identifier(t_alias))
                end
            end

            # Closes opened native token with unknown tokens
            if unknown.length > 0
                native = _class::new(@_driver, @_query, unknown)
                stack << native
                unknown = [ ]
            end

        # Unknown arguments pushes to the general native token
        else
            unknown << token
        end
        
    end

    # Closes opened native token with unknown tokens
    if unknown.length > 0
        native = _class::new(@_driver, @_query, unknown)
        stack << native
        unknown = [ ]
    end

    # Process stack with results
    first = true
    
    stack.each do |item|
        if item.kind_of? _class
            result << item.render!
        elsif item.string?               
            result << item
        end

        result << " "
    end

    return result
end