1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
# frozen_string_literal: true
require "active_model/type/registry"
module ActiveRecord
# :stopdoc:
module Type
class AdapterSpecificRegistry < ActiveModel::Type::Registry
def add_modifier(options, klass, **args)
registrations << DecorationRegistration.new(options, klass, **args)
end
private
def registration_klass
Registration
end
def find_registration(symbol, *args)
registrations
.select { |registration| registration.matches?(symbol, *args) }
.max
end
end
class Registration
def initialize(name, block, adapter: nil, override: nil)
@name = name
@block = block
@adapter = adapter
@override = override
end
def call(_registry, *args, adapter: nil, **kwargs)
if kwargs.any? # https://bugs.ruby-lang.org/issues/10856
block.call(*args, **kwargs)
else
block.call(*args)
end
end
def matches?(type_name, *args, **kwargs)
type_name == name && matches_adapter?(**kwargs)
end
def <=>(other)
if conflicts_with?(other)
raise TypeConflictError.new("Type #{name} was registered for all
adapters, but shadows a native type with
the same name for #{other.adapter}".squish)
end
priority <=> other.priority
end
# TODO Change this to private once we've dropped Ruby 2.2 support.
# Workaround for Ruby 2.2 "private attribute?" warning.
protected
attr_reader :name, :block, :adapter, :override
def priority
result = 0
if adapter
result |= 1
end
if override
result |= 2
end
result
end
def priority_except_adapter
priority & 0b111111100
end
private
def matches_adapter?(adapter: nil, **)
(self.adapter.nil? || adapter == self.adapter)
end
def conflicts_with?(other)
same_priority_except_adapter?(other) &&
has_adapter_conflict?(other)
end
def same_priority_except_adapter?(other)
priority_except_adapter == other.priority_except_adapter
end
def has_adapter_conflict?(other)
(override.nil? && other.adapter) ||
(adapter && other.override.nil?)
end
end
class DecorationRegistration < Registration
def initialize(options, klass, adapter: nil)
@options = options
@klass = klass
@adapter = adapter
end
def call(registry, *args, **kwargs)
subtype = registry.lookup(*args, **kwargs.except(*options.keys))
klass.new(subtype)
end
def matches?(*args, **kwargs)
matches_adapter?(**kwargs) && matches_options?(**kwargs)
end
def priority
super | 4
end
# TODO Change this to private once we've dropped Ruby 2.2 support.
# Workaround for Ruby 2.2 "private attribute?" warning.
protected
attr_reader :options, :klass
private
def matches_options?(**kwargs)
options.all? do |key, value|
kwargs[key] == value
end
end
end
end
class TypeConflictError < StandardError
end
# :startdoc:
end
|
