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# frozen_string_literal: true
module Valkyrie
# MetadataAdapter is the primary DataMapper object for metadata persistence.
# Used to register and locate adapters, persisters, and query services for individual
# metadata storage backends (such as fedora, postgres, etc)
class MetadataAdapter
class_attribute :adapters
self.adapters = {}
class << self
# Register an adapter by a short name.
# Registering an adapter by a short name makes the adapter easier to find and reference.
# @param adapter [#persister,#query_service] Adapter to register.
# @param short_name [Symbol] Name to register it under.
def register(adapter, short_name)
adapters[short_name.to_sym] = adapter
end
# Find an adapter by its short name.
# @param short_name [Symbol]
# @return [#persister,#query_service]
# @raise RuntimeError when the given short_name is not found amongst the registered adapters
def find(short_name)
symbolized_key = short_name.to_sym
return adapters[symbolized_key] if adapters.key?(symbolized_key)
raise "Unable to find unregistered adapter `#{short_name}'"
end
# @api public
# @since 0.1.0
# Find the persister registered under the given short-name
#
# @param short_name [Symbol]
# @return [Object] an object that behaves like "a Valkyrie::Persister"
# @see GEM_ROOT/lib/valkyrie/specs/shared_specs/persister.rb
def find_persister_for(short_name)
find(short_name).persister
end
# @api public
# @since 0.1.0
# Find the query service registered under the given short-name
#
# @param short_name [Symbol]
# @return [Object] an object that behaves like "a Valkyrie query provider"
# @see GEM_ROOT/lib/valkyrie/specs/shared_specs/queries.rb
def find_query_service_for(short_name)
find(short_name).query_service
end
end
end
end
Version data entries
47 entries across 47 versions & 1 rubygems