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require "concurrent/map"
module ActiveRecord
module Type
class TypeMap # :nodoc:
def initialize
@mapping = {}
@cache = Concurrent::Map.new do |h, key|
h.fetch_or_store(key, Concurrent::Map.new)
end
end
def lookup(lookup_key, *args)
fetch(lookup_key, *args) { Type.default_value }
end
def fetch(lookup_key, *args, &block)
@cache[lookup_key].fetch_or_store(args) do
perform_fetch(lookup_key, *args, &block)
end
end
def register_type(key, value = nil, &block)
raise ::ArgumentError unless value || block
@cache.clear
if block
@mapping[key] = block
else
@mapping[key] = proc { value }
end
end
def alias_type(key, target_key)
register_type(key) do |sql_type, *args|
metadata = sql_type[/\(.*\)/, 0]
lookup("#{target_key}#{metadata}", *args)
end
end
def clear
@mapping.clear
end
private
def perform_fetch(lookup_key, *args)
matching_pair = @mapping.reverse_each.detect do |key, _|
key === lookup_key
end
if matching_pair
matching_pair.last.call(lookup_key, *args)
else
yield lookup_key, *args
end
end
end
end
end
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