Class: HashStruct

Inherits:
Hash
  • Object
show all
Defined in:
lib/hashstruct.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ HashStruct

Returns a new instance of HashStruct.



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# File 'lib/hashstruct.rb', line 17

def initialize(args={})
  super()
  args.each { |key, value| self[key] = value }
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_id, *args) ⇒ Object 



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# File 'lib/hashstruct.rb', line 31

def method_missing(method_id, *args)
  method_name = method_id.to_s
  if method_name =~ /=$/
    raise ArgumentError, "wrong number of arguments for method #{method_name.inspect} (#{args.length} for 1)", caller(1) if args.length != 1
    raise TypeError, "can't modify frozen #{self.class}", caller(1) if self.frozen?
    self[method_name.chop] = args.first
  else
    raise ArgumentError, "wrong number of arguments (#{args.length} for 0)", caller(1) if args.length != 0
    self[method_id]
  end
end

Class Method Details

.make(obj) ⇒ Object 



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# File 'lib/hashstruct.rb', line 6

def self.make(obj)
  case obj
  when Hash
    new(obj.transform_values { |v| make(v) })
  when Array
    obj.map { |v| make(v) }
  else
    obj
  end
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/hashstruct.rb', line 22

def [](key)
  key = _make_key(key)
  has_key?(key) ? fetch(key) : nil
end

#[]=(key, value) ⇒ Object 



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# File 'lib/hashstruct.rb', line 27

def []=(key, value)
  store(_make_key(key), _convert_object(value))
end

#_convert_object(obj) ⇒ Object 



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# File 'lib/hashstruct.rb', line 47

def _convert_object(obj)
  case obj
  when String
    case obj.strip
    # URI
    when %r{^(ftp|http|https|mailto):}
      URI.parse(obj) rescue obj
    # integer
    when %r{^-?[1-9]\d*$}
      obj.to_i
    # hex integer
    when %r{^0x[0-9a-f]+$}i
      obj.hex
    # float
    when %r{^-?\d+\.\d+$}
      obj.to_f
    # percent
    when %r{^-?\d+(\.\d+)?%$}
      obj.to_f / 100
    # rational
    when %r{^(\d+)/(\d+)$}
      Rational($1.to_i, $2.to_i)
    # date
    when %r{^\d{4}-\d{2}-\d{2}},      # 2010-06-06
         %r{^\d{1,2}/\d{1,2}/\d{4}},  # 06/06/2010
         %r{^\d{4}/\d{1,2}/\d{1,2}}   # 2010/06/06
      Date.parse(obj)
    # boolean true
    when 'true', 'yes', 'on'
      true
    # boolean false
    when 'false', 'no', 'off'
      false
    # nil or empty string
    when nil, ''
      nil
    else
      obj
    end
  when Array
    obj.map { |o| _convert_object(o) }
  when Hash
    HashStruct.new(obj)
  when HashStruct
    obj
  else
    obj
  end
end

#_make_key(obj) ⇒ Object 



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# File 'lib/hashstruct.rb', line 43

def _make_key(obj)
  obj.to_s.downcase.gsub(/[^\w]/, '_').to_sym
end