class ActiveFedora::Associations::Builder::HasSubresource

def self.create_reflection(model, name, scope, options, extension = nil)
  options[:class_name] = 'ActiveFedora::File' if options[:class_name].blank?
  super(model, name, scope, options, extension)
end

def self.define_readers(mixin, name)
  mixin.send(:define_method, name) do |*params|
    association(name).reader(*params).tap do |file|
      set_uri = uri.is_a?(RDF::URI) ? uri.value.present? : uri.present?
      if set_uri
        file_uri = "#{uri}/#{name}"
        begin
          file.uri = file_uri
        rescue ActiveFedora::AlreadyPersistedError
        end
      end
      if file.respond_to?(:exists!)
        file.exists! if contains_assertions.include?(file_uri)
      end
    end
  end
end

def self.macro
  :has_subresource
end

def self.valid_options(options)
  super + [:autocreate, :block]
end

def self.validate_options(options)
  super
  return unless options[:class_name] && !options[:class_name].is_a?(String)
  raise ArgumentError, ":class_name must be a string for contains '#{name}'"
end