Class: Tabulard::RowValueBuilder

Inherits:
Object
  • Object
show all
Includes:
Utils::MonadicResult
Defined in:
lib/tabulard/row_value_builder.rb

Constant Summary

Constants included from Utils::MonadicResult

Utils::MonadicResult::Unit

Instance Method Summary collapse

Methods included from Utils::MonadicResult

#Do, #Failure, #Success

Constructor Details

#initialize(messenger) ⇒ RowValueBuilder

Returns a new instance of RowValueBuilder.



10
11
12
13
14
15
 
# File 'lib/tabulard/row_value_builder.rb', line 10

def initialize(messenger)
  @messenger  = messenger
  @data       = {}
  @composites = Set.new
  @failure    = false
end

Instance Method Details

#add(column, value) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/tabulard/row_value_builder.rb', line 17

def add(column, value)
  key = column.key
  type = column.type
  index = column.index

  result = type.scalar(index, value, @messenger)

  result.bind do |scalar|
    if type.composite?
      @composites << [key, type]
      @data[key] ||= []
      @data[key][index] = scalar
    else
      @data[key] = scalar
    end
  end

  result.or { @failure = true }

  result
end

#result ⇒ Object 



39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/tabulard/row_value_builder.rb', line 39

def result
  return Failure() if @failure

  Do() do
    @composites.each do |key, type|
      value = type.composite(@data[key], @messenger).unwrap

      @data[key] = value
    end

    Success(@data)
  end
end