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Contents
module Foobara
module Value
# TODO: do we really need these?? Can't just use a transformer?
class Caster < Transformer
class << self
def foobara_manifest(to_include: Set.new)
super.merge(processor_type: :caster)
end
def requires_declaration_data?
false
end
def create(options)
subclass(**options).instance
end
def subclass(name: nil, **options)
arity_zero = %i[name applies_message]
arity_one = %i[applicable? cast]
allowed = arity_zero + arity_one
invalid_options = options.keys - allowed
unless invalid_options.empty?
# :nocov:
raise ArgumentError, "Invalid options #{invalid_options} expected only #{allowed}"
# :nocov:
end
name ||= "#{self.name}::Anon#{SecureRandom.hex}"
unless name.include?(":")
name = "#{self.name}::#{name}"
end
Util.make_class name, self do
arity_one.each do |method_name|
if options.key?(method_name)
method = options[method_name]
define_method method_name do |value|
method.call(value)
end
end
end
arity_zero.each do |method_name|
if options.key?(method_name)
value = options[method_name]
define_method method_name do
value
end
end
end
end
end
end
def applicable?(_value)
# :nocov:
raise "subclass responsibility"
# :nocov:
end
def applies_message
# :nocov:
raise "subclass responsibility"
# :nocov:
end
def transform(value)
cast(value)
end
def cast(_value)
# :nocov:
raise "subclass responsibility"
# :nocov:
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems