Sha256: 0386279da391280bdf61982431b200126c98b2af2f1998062c9978368d82af58
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Contents
# encoding: utf-8
module ServiceObjects
module Helpers
# Features for service dependencies declaration
#
# @note
# A target class should be **extended** by the module
module Dependable
# Declares the dependency setter and getter
#
# @example
# class AddFoo
# extend ServiceObjects::Helpers::Dependable
#
# depends_on :get_item, default: GetItem
# end
#
# service = AddFoo.new
# service.get_item
# # => GetItem
#
# # Depencency injection
# service.get_item = FindItem
# service.get_item
# # => FindItem
#
# # Resetting to default
# service.get_item = nil
# service.get_item
# # => GetItem
#
# @example Set to NULL Object by default
# class AddFoo
# extend ServiceObjects::Helpers::Dependable
#
# depends_on :get_item
# end
#
# service = AddFoo.new
# service.get_item
# # => <ServiceObjects::NULL>
#
# @param [#to_sym] name
# the name for the dependency
# @param [BaseObject] default (ServiceObjects::NULL)
# default implementation for the dependency
#
# @return [:depends_on]
# the name of the method
def depends_on(name, default: NULL)
attr_writer name
define_method(name) { instance_eval("@#{ name }") || default }
end
end # Dependable
end # module Helpers
end # module ServiceObjects
Version data entries
3 entries across 3 versions & 1 rubygems