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Contents
require "virtus"
module AdaptivePayments
# A Virtus Attribute used to hold a collection of objects boxed to a given type.
#
# The NodeList Attribute should not be used directly. Instead, it should be given a type to box.
#
# attribute :children, NodeList[Child], :param => "child"
#
# In the above, the model gets an Array accessible through model.children. All objects contained
# in the Array will be coerced to the boxed type. If an Array is assigned directly to the attribute,
# all items inside it will be coerced to the boxed type. If a Hash is pushed onto the existing
# Array, it will be coerced to the boxed type.
class NodeList < Virtus::Attribute::Object
primitive ::Array
# Allow access to the boxed type
attr_reader :type
class << self
# Return a descendant of NodeList boxing the given type.
#
# @param [Class<JsonModel>] type
# the type to box
#
# @return [NodeList]
# an anonymous descendant of NodeList boxing the given type
def [](type)
raise ArgumentError, "Lists may only be created from JsonModel classes" unless type <= JsonModel
Class.new(self) do
default lambda { |m, a| CoercedArray.new(type) }
define_method :type do
type
end
define_method :coerce do |value|
CoercedArray.new(type) + Array(value)
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems