Class: BERT::Decoder

Inherits:
Object
  • Object
show all
Defined in:
lib/bert/decoder.rb

Class Method Summary collapse

Class Method Details

.convert(item) ⇒ Object

Convert Erlectricity representation of BERT complex types into corresponding Ruby types.

+item+ is the Ruby object to convert

Returns the converted Ruby object



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# File 'lib/bert/decoder.rb', line 17

def self.convert(item)
  case item
    when TrueClass, FalseClass
      item.to_s.to_sym
    when Erl::List
      item.map { |x| convert(x) }
    when Array
      if item[0] == :bert
        convert_bert(item)
      else
        Tuple.new(item.map { |x| convert(x) })
      end
    else
      item
  end
end

.convert_bert(item) ⇒ Object

Convert complex types.

+item+ is the complex type array

Returns the converted Ruby object



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# File 'lib/bert/decoder.rb', line 38

def self.convert_bert(item)
  case item[1]
    when :nil
      nil
    when :dict
      item[2].inject({}) do |acc, x|
        acc[convert(x[0])] = convert(x[1]); acc
      end
    when TrueClass
      true
    when FalseClass
      false
    when :time
      Time.at(item[2] * 1_000_000 + item[3], item[4])
    when :regex
      options = 0
      options |= Regexp::EXTENDED if item[3].include?(:extended)
      options |= Regexp::IGNORECASE if item[3].include?(:caseless)
      options |= Regexp::MULTILINE if item[3].include?(:multiline)
      Regexp.new(item[2], options)
    else
      nil
  end
end

.decode(bert) ⇒ Object

Decode a BERT into a Ruby object.

+bert+ is the BERT String

Returns a Ruby object



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# File 'lib/bert/decoder.rb', line 7

def self.decode(bert)
  simple_ruby = Erlectricity::Decoder.decode(bert)
  convert(simple_ruby)
end