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Contents
# encoding: utf-8
module Mixture
# An attribute for a mixture object.
class Attribute
# The name of the attribute.
#
# @return [Symbol]
attr_reader :name
# The options for the attribute. This is mainly used for coercion
# and validation.
#
# @return [Hash]
attr_reader :options
# Initialize the attribute.
#
# @param name [Symbol] The name of the attribute.
# @param list [AttributeList] The attribute list this attribute is
# a part of.
# @param options [Hash] The optiosn for the attribute.
def initialize(name, list, options = {})
@name = name
@list = list
@options = options
end
# Update the attribute with the given value. It runs the value
# through the callbacks, and returns a new value given by the
# callbacks.
#
# @param value [Object] The new value.
# @return [Object] The new new value.
def update(value)
@list.callbacks[:update].inject(value) { |a, e| e.call(self, a) }
end
# @!attribute [r] ivar
# The instance variable for this attribute.
#
# @example Retrieve the instance variable.
# attribute.ivar # => :@name
# @return [Symbol]
def ivar
@_ivar ||= :"@#{@name}"
end
# @!attribute [r] getter
# The getter method for this attribute.
#
# @example Retrieve the getter.
# attribute.getter # => :name
# @return [Symbol]
def getter
@name
end
# @!attribute [r] setter
# The setter method for this attribute.
#
# @example Retrieve the setter.
# attribute.setter # :name=
# @return [Symbol]
def setter
@_setter ||= :"#{@name}="
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems