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Stored size: 919 Bytes
Contents
require 'active_support/core_ext/string'
class Kookaburra
# @private
module DependencyAccessor
# Creates a private attr_reader on the class that will raise an exception if
# the attribute has a nil value when it is called. Useful for attributes
# that can optionally be set in an object's constructor but it is not an
# error for them to be missing unless something actually wants to use them.
def dependency_accessor(*names)
names.each { |name| define_dependency_accessor(name) }
end
private
def define_dependency_accessor(name)
define_method(name) do
instance_variable_get("@#{name}") or raise "No %s object was set on %s initialization." \
% [name, [self.class.name, 'an Anonymous Class!!!'].reject(&:blank?).first]
end
define_method("#{name}=") do |value|
instance_variable_set("@#{name}", value)
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems