Class: Objectify::Injector

Inherits:
Object
  • Object
show all
Includes:
Instrumentation
Defined in:
lib/objectify/injector.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Injector

Returns a new instance of Injector.



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# File 'lib/objectify/injector.rb', line 9

def initialize(config)
  @config = config
  @decoration_context = {}
end

Instance Attribute Details

#config=(value) ⇒ Object (writeonly)

Sets the attribute config

Parameters:

  • value —

    the value to set the attribute config to.



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# File 'lib/objectify/injector.rb', line 7

def config=(value)
  @config = value
end

Instance Method Details

#call(object, method) ⇒ Object 



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# File 'lib/objectify/injector.rb', line 14

def call(object, method)
  payload = {:object => object, :method => method}
  instrument("inject.objectify", payload) do |payload|
    namespace            = object.respond_to?(:name) && object.name ? object.name.underscore.split("/")[0...-1].join("/") : nil
    method_obj           = method_object(object, method)
    injectables          = method_obj.parameters.map do |reqd, name|
      @decoration_context[[namespace, name].join("/").to_sym] || @decoration_context[name] || @config.get(name) if reqd == :req
    end.compact
    arguments            = injectables.map do |type, value|
      if type == :unknown
        type, value = unknown_value_to_injectable(namespace, value)
      end

      if type == :resolver
        resolver_klass = [value, :resolver].join("_").camelize.constantize
        call(call(resolver_klass, :new), :call)
      elsif type == :implementation
        implementation_klass = value.to_s.camelize.constantize
        call(implementation_klass, :new)
      elsif type == :value
        value
      else
        raise ArgumentError, "Unknown injectable type: #{type}."
      end
    end

    payload[:parameters]  = method_obj.parameters
    payload[:injectables] = injectables
    payload[:arguments]   = arguments

    result = object.send(method, *arguments)
    if method == :new
      base_name = object.name.underscore.to_sym
      add_decoration_context(base_name, result)
      result = @config.decorators(base_name).inject(result) do |memo, decorator|
        call(decorator.to_s.camelize.constantize, :new).tap do |decorated|
          add_decoration_context(base_name, decorated)
        end
      end
      clear_decoration_context
    end

    result
  end
end