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Contents
# frozen_string_literal: true
require "dry/system/errors"
module Dry
module System
# Default component loader implementation
#
# This class is configured by default for every System::Container. You can
# provide your own and use it in your containers too.
#
# @example
# class MyLoader < Dry::System::Loader
# def call(*args)
# constant.build(*args)
# end
# end
#
# class MyApp < Dry::System::Container
# configure do |config|
# # ...
# config.component_dirs.loader = MyLoader
# end
# end
#
# @api public
class Loader
class << self
# Requires the component's source file
#
# @api public
def require!(component)
require(component.require_path)
self
end
# Returns an instance of the component
#
# Provided optional args are passed to object's constructor
#
# @param [Array] args Optional constructor args
#
# @return [Object]
#
# @api public
def call(component, *args)
require!(component)
constant = self.constant(component)
if singleton?(constant)
constant.instance(*args)
else
constant.new(*args)
end
end
ruby2_keywords(:call) if respond_to?(:ruby2_keywords, true)
# Returns the component's class constant
#
# @return [Class]
#
# @api public
def constant(component)
inflector = component.inflector
const_name = inflector.camelize(component.const_path)
inflector.constantize(const_name)
rescue NameError => e
raise ComponentNotLoadableError.new(component, e)
end
private
def singleton?(constant)
constant.respond_to?(:instance) && !constant.respond_to?(:new)
end
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems