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|
module RR
module Injections
class SingletonMethodAddedInjection < Injection
extend(Module.new do
def find_or_create(subject_class)
instances[subject_class] ||= begin
new(subject_class).bind
end
end
def find(subject)
instances[subject]
end
def exists?(subject)
instances.include?(subject)
end
end)
include ClassInstanceMethodDefined
attr_reader :subject_class
def initialize(subject_class)
@subject_class = subject_class
@placeholder_method_defined = false
end
def bind
unless class_instance_method_defined(subject_class, original_method_alias_name, false)
unless class_instance_method_defined(subject_class, :singleton_method_added, false)
@placeholder_method_defined = true
subject_class.class_eval do
#def singleton_method_added(method_name)
# super
#end
end
end
memoized_original_method_alias_name = original_method_alias_name
subject_class.__send__(:alias_method, original_method_alias_name, :singleton_method_added)
memoized_subject_class = subject_class
memoized_original_method_alias_name = original_method_alias_name
subject_class.__send__(:define_method, :singleton_method_added) do |method_name_arg|
if Injections::DoubleInjection.exists?(memoized_subject_class, method_name_arg)
Injections::DoubleInjection.find_or_create(memoized_subject_class, method_name_arg).send(:deferred_bind_method)
end
__send__(memoized_original_method_alias_name, method_name_arg)
end
end
self
end
def reset
if subject_has_method_defined?(original_method_alias_name)
memoized_original_method_alias_name = original_method_alias_name
placeholder_method_defined = @placeholder_method_defined
subject_class.class_eval do
remove_method :singleton_method_added
unless placeholder_method_defined
alias_method :singleton_method_added, memoized_original_method_alias_name
end
remove_method memoized_original_method_alias_name
end
end
end
protected
def original_method_alias_name
"__rr__original_singleton_method_added"
end
end
end
end
|
