Class: Plumb::InterfaceClass

Inherits:
Object
  • Object
show all
Includes:
Steppable
Defined in:
lib/plumb/interface_class.rb

Instance Attribute Summary collapse

Attributes included from Steppable

#name

Instance Method Summary collapse

Methods included from Steppable

#===, #>>, #as_node, #build, #check, #defer, #freeze, included, #inspect, #invalid, #invoke, #match, #meta, #node_name, #not, #pipeline, #policy, #to_s, #transform, #value, wrap, #|

Methods included from Callable

#metadata, #parse, #resolve

Constructor Details

#initialize(method_names = []) ⇒ InterfaceClass

Returns a new instance of InterfaceClass.



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# File 'lib/plumb/interface_class.rb', line 11

def initialize(method_names = [])
  @method_names = method_names
  freeze
end

Instance Attribute Details

#method_names ⇒ Object (readonly)

Returns the value of attribute method_names.



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# File 'lib/plumb/interface_class.rb', line 9

def method_names
  @method_names
end

Instance Method Details

#call(result) ⇒ Object 



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# File 'lib/plumb/interface_class.rb', line 27

def call(result)
  obj = result.value
  missing_methods = @method_names.reject { |m| obj.respond_to?(m) }
  return result.invalid(errors: "missing methods: #{missing_methods.join(', ')}") if missing_methods.any?

  result
end

#of(*args) ⇒ Object Also known as: [] 



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# File 'lib/plumb/interface_class.rb', line 16

def of(*args)
  case args
  in Array => symbols if symbols.all? { |s| s.is_a?(::Symbol) }
    self.class.new(symbols)
  else
    raise ::ArgumentError, "unexpected value to Types::Interface#of #{args.inspect}"
  end
end