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require "virtus"
module AdaptivePayments
# A Virtus Attribute used to box a type from the API to an Attribute in a JsonModel
#
# The Node type should not be used directly. Instead it should be given a type to box.
#
# attribute :child, Node[Child], :param => "childItem"
#
# In the above, the model gets an Attribute named #child, mapping to a JSON parameter named 'childItem'.
# The object at `model.child` is present by default, and is an object of type Child.
#
# Assigning a Hash directly to the attribute will store an object of the boxed type, based on the elements
# in the Hash.
class Node < Virtus::Attribute::Object
# Provide access to the boxed type
attr_reader :type
class << self
# Returns a descendant of Node, boxing the given type
#
# @param [Class<JsonModel>] type
# the class definition to box
#
# @return [Node<type>]
# an anonymous descendant of Node boxing the given type
def [](type)
raise ArgumentError, "Child nodes may only be other JsonModel classes" unless type <= JsonModel
@generated_class_map ||= {}
@generated_class_map[type] ||= Class.new(self) do
default lambda { |m, a| type.new }
define_method :type do
type
end
define_method :coerce do |value|
value.kind_of?(Hash) ? type.new(value) : value
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems