Class: Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/json_mapper/attribute.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, source_attributes, type, options = {}) ⇒ Attribute

Returns a new instance of Attribute.



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# File 'lib/json_mapper/attribute.rb', line 5

def initialize(name, source_attributes, type, options = {})
  
  self.name = name
  self.source_attributes = source_attributes.is_a?(Array) ? source_attributes : [ source_attributes ]
  self.type = type
  self.options = options

end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/json_mapper/attribute.rb', line 3

def name
  @name
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/json_mapper/attribute.rb', line 3

def options
  @options
end

#source_attributes ⇒ Object

Returns the value of attribute source_attributes.



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# File 'lib/json_mapper/attribute.rb', line 3

def source_attributes
  @source_attributes
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/json_mapper/attribute.rb', line 3

def type
  @type
end

Instance Method Details

#method_name ⇒ Object 



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# File 'lib/json_mapper/attribute.rb', line 14

def method_name
  @method_name ||= self.name.to_s.tr("-", "_")
end

#self_referential? ⇒ Boolean

Returns:



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# File 'lib/json_mapper/attribute.rb', line 18

def self_referential?
  self.source_attributes.include?("self")
end

#typecast(value) ⇒ Object 



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# File 'lib/json_mapper/attribute.rb', line 22

def typecast(value)

  return value if value.nil?

  if self.type == String then return value.to_s
  elsif self.type == DelimitedString
    self.options[:delimiter] ||= ","
    return value.split(self.options[:delimiter])
  elsif self.type == Integer
    begin
      return value.to_i
    rescue
      return nil
    end
  elsif self.type == Float
    begin
      return value.to_f
    rescue
      return nil
    end
  elsif self.type == Boolean then return %w(true t 1).include?(value.to_s.downcase)
  elsif self.type == DateTime then return Date.parse(value.to_s)
  else

    # If our type is a JSONMapper instance, delegate the
    # mapping to that class
    if self.type.new.is_a?(JSONMapper)
      return self.type.parse_json(value)
    else
      return value
    end

  end

end