Class: TomlRB::Keygroup

Inherits:
Object
  • Object
show all
Defined in:
lib/toml-rb/keygroup.rb

Instance Method Summary collapse

Constructor Details

#initialize(nested_keys) ⇒ Keygroup

Returns a new instance of Keygroup.



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# File 'lib/toml-rb/keygroup.rb', line 3

def initialize(nested_keys)
  @nested_keys = nested_keys
end

Instance Method Details

#accept_visitor(parser) ⇒ Object 



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# File 'lib/toml-rb/keygroup.rb', line 26

def accept_visitor(parser)
  parser.visit_keygroup self
end

#ensure_key_not_defined(visited_keys) ⇒ Object

Fail if the key was already defined with a ValueOverwriteError



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# File 'lib/toml-rb/keygroup.rb', line 21

def ensure_key_not_defined(visited_keys)
  fail ValueOverwriteError.new(full_key) if visited_keys.include?(full_key)
  visited_keys << full_key
end

#full_key ⇒ Object 



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# File 'lib/toml-rb/keygroup.rb', line 30

def full_key
  @nested_keys.join('.')
end

#navigate_keys(hash, visited_keys, symbolize_keys = false) ⇒ Object 



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# File 'lib/toml-rb/keygroup.rb', line 7

def navigate_keys(hash, visited_keys, symbolize_keys = false)
  ensure_key_not_defined(visited_keys)
  @nested_keys.each do |key|
    key = symbolize_keys ? key.to_sym : key
    hash[key] = {} unless hash.key?(key)
    element = hash[key]
    hash = element.is_a?(Array) ? element.last : element
    # check that key has not been defined before as a scalar value
    fail ValueOverwriteError.new(key) unless hash.is_a?(Hash)
  end
  hash
end