This implements a factory by storing classes indexed with a given key and creates objects based on that key.
@!attribute [r] implementations
@return [Hash<Object, Class>] A hash of keys and the associated implementations that this factory can generate.
# File lib/r10k/keyed_factory.rb, line 12 def initialize @implementations = {} end
# File lib/r10k/keyed_factory.rb, line 28 def generate(key, *args) if (impl = @implementations[key]) impl.new(*args) else raise UnknownImplementationError, _("No class registered for %{key}") % {key: key} end end
# File lib/r10k/keyed_factory.rb, line 16 def register(key, klass) if @implementations.has_key?(key) raise DuplicateImplementationError, _("Class already registered for %{key}") % {key: key} else @implementations[key] = klass end end
# File lib/r10k/keyed_factory.rb, line 24 def retrieve(key) @implementations[key] end