Class: Arrow::Aggregation

Inherits:
Object
  • Object
show all
Defined in:
lib/arrow/aggregation.rb

Class Method Summary collapse

Class Method Details

.try_convert(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/arrow/aggregation.rb', line 22

def try_convert(value)
  case value
  when Hash
    function = value[:function]
    return nil if function.nil?
    function = function.to_s if function.is_a?(Symbol)
    return nil unless function.is_a?(String)
    # TODO: Improve this when we have non hash based aggregate function
    function = "hash_#{function}" unless function.start_with?("hash_")
    options = value[:options]
    input = value[:input]
    return nil if input.nil?
    output = value[:output]
    if output.nil?
      normalized_function = function.gsub(/\Ahash_/, "")
      output = "#{normalized_function}(#{input})"
    end
    new(function, options, input, output)
  else
    nil
  end
end