Class: Pubid::TypeResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/pubid/type_resolver.rb

Overview

Resolves a polymorphic _type string (e.g. "pubid:iso:technical-report") to the concrete Ruby class that owns it.

Each flavor's Identifier base owns a polymorphic_type_map for the types defined in its own namespace. A nested polymorphic attribute (e.g. a GOST Harmonized identifier's adopted ISO identifier) carries a _type from a different flavor, so the owning flavor's map misses. This service routes the lookup to the registered flavor whose name appears in the type's second segment ("pubid::…"), giving every from_hash caller a single cross-flavor dispatch path.

Constant Summary collapse

TYPE_PREFIX = 
"pubid:"
SEGMENT_SEPARATOR = 
":"

Class Method Summary collapse

Class Method Details

.resolve(type) ⇒ Class<Pubid::Identifier>?

Returns The concrete class, or nil if the type is blank, malformed, or unknown to its flavor.

Parameters:

  • type (String, nil) —

    Polymorphic _type, e.g. "pubid:iso:technical-report".

Returns:

  • (Class<Pubid::Identifier>, nil) —

    The concrete class, or nil if the type is blank, malformed, or unknown to its flavor.



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# File 'lib/pubid/type_resolver.rb', line 22

def resolve(type)
  return nil unless type.is_a?(String)

  flavor_name = flavor_segment(type)
  return nil unless flavor_name

  # Ensure the flavor module is loaded so its self-register call has
  # run; without this, Registry may know of flavors that haven't yet
  # populated their Identifier base's polymorphic_type_map.
  ::Pubid.eager_load_flavors!

  flavor = ::Pubid::Registry.get(flavor_name)
  return nil unless flavor

  identifier_base = flavor::Identifier
  identifier_base.polymorphic_type_map[type]
rescue NameError
  # Flavor module is registered but its Identifier base cannot be
  # loaded (autoload failure). Treat as unresolvable.
  nil
end