Class: Lutaml::Model::MappingRule

Inherits:
Object
  • Object
show all
Includes:
DeepDupable
Defined in:
lib/lutaml/model/mapping/mapping_rule.rb

Direct Known Subclasses

KeyValue::MappingRule, Xml::MappingRule

Constant Summary collapse

ALLOWED_OPTIONS = 
{
  render_nil: %i[
    omit
    as_nil
    as_blank
    as_empty
  ],
  render_empty: %i[
    omit
    as_empty
    as_blank
    as_nil
  ],
}.freeze
EMPTY_TRANSFORMERS =

Frozen empty array for the common case of no transformers

[].freeze
TRANSFORM_DISPATCH =

Verdict for handle_transform_method's dispatch, computed once per (rule, attribute) — both are static after definition, but rules may be frozen, so the memo lives at class level keyed on identity. :assign — no transformer runs on deserialize (fast path); :import — hash/proc transformers go through ImportTransformer.

{}.compare_by_identity
PARSED_ASSIGN_WRITERS =

[model class, target] -> the parsed-assign writer compiled for that class's attribute, or nil when only a casting writer exists (custom writers, reflective names, enum shorthands). Class-level because mapping rules may be frozen (see the name-string note above TRANSFORM_DISPATCH).

{}.compare_by_identity

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, to:, to_instance: nil, as_attribute: nil, render_nil: false, render_default: false, render_empty: false, treat_nil: :nil, treat_empty: :empty, treat_omitted: :nil, with: {}, attribute: false, delegate: nil, root_mappings: nil, polymorphic: {}, polymorphic_map: {}, transform: {}, value_map: {}, serialize: true, when_attribute: {}) ⇒ MappingRule

Returns a new instance of MappingRule.



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
137
138
139
140
141
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 55

def initialize(
  name,
  to:,
  to_instance: nil,
  as_attribute: nil,
  render_nil: false,
  render_default: false,
  render_empty: false,
  treat_nil: :nil,
  treat_empty: :empty,
  treat_omitted: :nil,
  with: {},
  attribute: false,
  delegate: nil,
  root_mappings: nil,
  polymorphic: {},
  polymorphic_map: {},
  transform: {},
  value_map: {},
  serialize: true,
  when_attribute: {}
)
  @name = name
  @to = to
  # Dynamic symbol built per call allocated ~10% of parse objects on
  # attribute-heavy documents; `to` is immutable, so build it once.
  @setter_name = :"#{to}="
  @to_instance = to_instance
  @as_attribute = as_attribute
  @render_nil = render_nil
  @render_default = render_default
  @render_empty = render_empty
  @treat_nil = treat_nil
  @treat_empty = treat_empty
  @treat_omitted = treat_omitted
  @custom_methods = with
  @attribute = attribute
  @delegate = delegate
  @root_mappings = root_mappings
  @polymorphic = polymorphic
  @polymorphic_map = polymorphic_map
  @transform = transform
  @serialize_mapping = serialize
  # Attribute-value discriminator (lutaml-model#88): select this
  # rule's wire occurrences by a sibling attribute value, e.g.
  # `when_attribute: { "type" => "guidance" }`.
  @when_attribute = (when_attribute || {}).freeze

  # Cache whether this rule needs the full deserialize chain.
  # Over 95% of rules are "simple" (no custom method, no delegate).
  @needs_full_deserialize = has_custom_method_for_deserialization? || !!delegate

  # Only calculate default_value_map if value_map is not fully provided
  if value_map.empty? || !value_map[:from] || !value_map[:to]
    # Build value_map by starting with defaults from render_nil/render_empty,
    # then overlaying user-provided value_map entries on top.
    # User-provided value_map entries take PRECEDENCE over computed defaults.
    # This ensures that value_map: { to: { empty: :empty } } overrides
    # the default render_empty: false → :omitted behavior.
    vm = {
      from: (value_map[:from] || {}).dup,
      to: (value_map[:to] || {}).dup,
    }
    defaults = default_value_map
    vm[:from] = defaults[:from].merge(vm[:from])
    vm[:to] = defaults[:to].merge(vm[:to])
    @value_map = vm
  else
    # Complete value_map provided (e.g., from deep_dup), use it directly.
    @value_map = value_map
  end

  # Freeze value_map and its inner hashes — they are never mutated after
  # construction, and downstream code reads them on every serialization.
  @value_map[:from].freeze
  @value_map[:to].freeze
  @value_map.freeze

  # The :from treatment flags are read on every rule application of
  # every parse; they are static once @value_map is final. The three
  # Hash#[] chains per value used to cost 1.4 M value_map calls per
  # ISO-13849 parse.
  from_map = @value_map[:from]
  @treat_nil_flag = from_map[:nil] != :omitted
  @treat_empty_flag = from_map[:empty] != :omitted
  @treat_omitted_flag = from_map[:omitted] != :omitted
end

Instance Attribute Details

#as_attribute ⇒ Object (readonly)

Returns the value of attribute as_attribute.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def as_attribute
  @as_attribute
end

#attribute ⇒ Object (readonly) Also known as: attribute?

Returns the value of attribute attribute.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def attribute
  @attribute
end

#custom_methods ⇒ Object (readonly)

Returns the value of attribute custom_methods.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def custom_methods
  @custom_methods
end

#delegate ⇒ Object (readonly)

Returns the value of attribute delegate.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def delegate
  @delegate
end

#format ⇒ Object (readonly)

Returns the value of attribute format.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def format
  @format
end

#name ⇒ Object (readonly) Also known as: from

Returns the value of attribute name.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def name
  @name
end

#polymorphic ⇒ Object (readonly)

Returns the value of attribute polymorphic.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def polymorphic
  @polymorphic
end

#polymorphic_map ⇒ Object (readonly)

Returns the value of attribute polymorphic_map.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def polymorphic_map
  @polymorphic_map
end

#render_default ⇒ Object (readonly) Also known as: render_default?

Returns the value of attribute render_default.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def render_default
  @render_default
end

#render_empty ⇒ Object (readonly)

Returns the value of attribute render_empty.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def render_empty
  @render_empty
end

#render_nil ⇒ Object (readonly)

Returns the value of attribute render_nil.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def render_nil
  @render_nil
end

#to ⇒ Object (readonly)

Returns the value of attribute to.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def to
  @to
end

#to_instance ⇒ Object (readonly)

Returns the value of attribute to_instance.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def to_instance
  @to_instance
end

#transform ⇒ Object (readonly)

Returns the value of attribute transform.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def transform
  @transform
end

#treat_empty ⇒ Object (readonly)

Returns the value of attribute treat_empty.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def treat_empty
  @treat_empty
end

#treat_nil ⇒ Object (readonly)

Returns the value of attribute treat_nil.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def treat_nil
  @treat_nil
end

#treat_omitted ⇒ Object (readonly)

Returns the value of attribute treat_omitted.



6
7
8
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 6

def treat_omitted
  @treat_omitted
end

Class Method Details

.parsed_assign_writer(model_class, target) ⇒ Object 



451
452
453
454
455
456
457
458
459
460
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 451

def self.parsed_assign_writer(model_class, target)
  key = [model_class, target]
  writer = PARSED_ASSIGN_WRITERS[key]
  return writer unless writer.nil?

  name = :"__assign_parsed_#{target}="
  writer = model_class.method_defined?(name) ? name : false
  PARSED_ASSIGN_WRITERS[key] = writer
  writer
end

.transform_dispatch(rule, attr) ⇒ Object 



469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 469

def self.transform_dispatch(rule, attr)
  per_attr = TRANSFORM_DISPATCH[rule]
  if per_attr.nil?
    per_attr = {}.compare_by_identity
    TRANSFORM_DISPATCH[rule] = per_attr
  end
  verdict = per_attr[attr]
  return verdict if verdict

  rule_transform = rule.transform
  # NB: `::Hash` — inside Lutaml::Model the bare constant `Hash` is
  # the hash-format adapter class, so a plain is_a?(Hash) is always
  # false here (the original dispatch shared that shadow and never
  # took the hash-transform branch).
  rule_has = rule_transform.is_a?(Class) ||
    (rule_transform.is_a?(::Hash) && !rule_transform.empty?)
  attr_transform = attr&.transform
  attr_has = attr_transform &&
    (attr_transform.is_a?(Class) ||
     (attr_transform.is_a?(::Hash) && !attr_transform.empty?))

  verdict = if !rule_has && !attr_has
              :assign
            elsif rule.get_transformers(attr).any? do |t|
              t.is_a?(Class) && t < Lutaml::Model::ValueTransformer
            end
              :assign
            else
              :import
            end
  per_attr[attr] = verdict
  verdict
end

Instance Method Details

#can_transform_to?(attribute, format) ⇒ Boolean

Returns:

  • (Boolean) 


437
438
439
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 437

def can_transform_to?(attribute, format)
  get_transformers(attribute).any? { |t| t.can_transform?(:to, format) }
end

#custom_method_only? ⇒ Boolean

Returns:

  • (Boolean) 


355
356
357
358
359
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 355

def custom_method_only?
  name = attribute_name.to_s
  (name.start_with?("__") && name.end_with?("__")) ||
    (has_custom_methods? && attribute_type.nil?)
end

#deep_dup ⇒ Object

Raises:

  • (NotImplementedError) 


385
386
387
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 385

def deep_dup
  raise NotImplementedError, "Subclasses must implement `deep_dup`."
end

#default_value_map(options = {}) ⇒ Object 



143
144
145
146
147
148
149
150
151
152
153
154
155
156
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 143

def default_value_map(options = {})
  render_nil_as = render_as(:render_nil, :omitted, options)
  render_empty_as = render_as(:render_empty, :empty, options)

  treat_nil_as = treat_as(:treat_nil, :nil, options)
  treat_empty_as = treat_as(:treat_empty, :empty, options)
  treat_omitted_as = treat_as(:treat_omitted, :nil, options)

  {
    from: { omitted: treat_omitted_as, nil: treat_nil_as,
            empty: treat_empty_as },
    to: { omitted: :omitted, nil: render_nil_as, empty: render_empty_as },
  }
end

#deserialize(model, value, attributes, mapper_class = nil, context = nil, pre_cast: false) ⇒ Object 



326
327
328
329
330
331
332
333
334
335
336
337
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 326

def deserialize(model, value, attributes, mapper_class = nil,
context = nil, pre_cast: false)
  if @needs_full_deserialize
    handle_custom_method(model, value, mapper_class, context) ||
      handle_delegate(model, value, attributes) ||
      handle_transform_method(model, value, attributes, context,
                              pre_cast: pre_cast)
  else
    handle_transform_method(model, value, attributes, context,
                            pre_cast: pre_cast)
  end
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


377
378
379
380
381
382
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 377

def eql?(other)
  other.class == self.class &&
    instance_variables.all? do |var|
      instance_variable_get(var) == other.instance_variable_get(var)
    end
end

#get_transformers(attribute) ⇒ Object 



503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 503

def get_transformers(attribute)
  # Fast path: most rules have no transforms at all
  rule_transform = transform
  attr_transform = attribute&.transform

  if !rule_transform && !attr_transform
    return EMPTY_TRANSFORMERS
  end

  # Build transformer list only when needed
  transformers = []
  transformers << rule_transform if rule_transform
  transformers << attr_transform if attr_transform
  transformers.select! { |t| t.is_a?(Class) }
  transformers.freeze
end

#has_custom_method_for_deserialization? ⇒ Boolean

Returns:

  • (Boolean) 


365
366
367
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 365

def has_custom_method_for_deserialization?
  !custom_methods.empty? && custom_methods[:from]
end

#has_custom_method_for_serialization? ⇒ Boolean

Returns:

  • (Boolean) 


361
362
363
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 361

def has_custom_method_for_serialization?
  !custom_methods.empty? && custom_methods[:to]
end

#has_items?(value) ⇒ Boolean

Check if value is a non-empty collection

Returns:

  • (Boolean) 


240
241
242
243
244
245
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 240

def has_items?(value)
  return false if value.nil? || Utils.uninitialized?(value)
  return false unless value.is_a?(String) || value.is_a?(Array) || value.is_a?(Hash)

  !value.empty?
end

#multiple_mappings? ⇒ Boolean

Returns:

  • (Boolean) 


369
370
371
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 369

def multiple_mappings?
  name.is_a?(Array)
end

#mutated_collection?(value, instance) ⇒ Boolean

Returns:

  • (Boolean) 


230
231
232
233
234
235
236
237
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 230

def mutated_collection?(value, instance)
  return false if value.nil? || Utils.uninitialized?(value)
  return false unless value.is_a?(Array) || value.is_a?(Lutaml::Model::Collection)
  return false if value.empty? # Empty collection is still default

  # If it's a non-empty collection and marked as using_default, it was mutated
  instance.is_a?(Lutaml::Model::Serialize) && instance.using_default?(to)
end

#name_strings ⇒ Object

Normalized name spellings for matching, computed once. The name is fixed after construction (attr_reader only), so the memo is safe. Hot loops used to redo Array(name).map(&:to_s) per element.



51
52
53
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 51

def name_strings
  @name_strings ||= Array(name).map(&:to_s).freeze
end

#polymorphic_mapping? ⇒ Boolean

Returns:

  • (Boolean) 


284
285
286
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 284

def polymorphic_mapping?
  polymorphic_map && !polymorphic_map.empty?
end

#raw_mapping? ⇒ Boolean

Returns:

  • (Boolean) 


373
374
375
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 373

def raw_mapping?
  name == Constants::RAW_MAPPING_KEY
end

#raw_value_map ⇒ Object

Raw value_map hash access (for compiled rules). Use value_map(key, options) for individual lookups with overrides.



391
392
393
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 391

def raw_value_map
  @value_map
end

#render?(value, instance = nil, options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


191
192
193
194
195
196
197
198
199
200
201
202
203
204
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 191

def render?(value, instance = nil, options = {})
  if invalid_value?(value, options)
    false
  # FIXED: Check if collection was mutated after initialization
  # A non-empty collection initialized with default [] should render if mutated
  # This handles the case where collection is mutated with << or custom methods
  elsif mutated_collection?(value, instance)
    true
  elsif instance.is_a?(Lutaml::Model::Serialize) && instance.using_default?(to)
    render_default? || RenderPolicy.derived_attribute_for?(instance, to)
  else
    true
  end
end

#render_as(key, default_value, options = {}) ⇒ Object 



158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 158

def render_as(key, default_value, options = {})
  value = public_send(key)
  value = options[key] if value.nil?

  if value == true
    key.to_s.split("_").last.to_sym
  elsif value == false
    :omitted
  elsif value
    {
      as_empty: :empty,
      as_blank: :blank,
      as_nil: :nil,
      omit: :omitted,
    }[value]
  else
    default_value
  end
end

#render_empty?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


258
259
260
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 258

def render_empty?(options = {})
  value_map(:to, options)[:empty] != :omitted
end

#render_nil?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


254
255
256
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 254

def render_nil?(options = {})
  value_map(:to, options)[:nil] != :omitted
end

#render_omitted?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


262
263
264
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 262

def render_omitted?(options = {})
  value_map(:to, options)[:omitted] != :omitted
end

#render_value_for(value) ⇒ Object 



218
219
220
221
222
223
224
225
226
227
228
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 218

def render_value_for(value)
  if value.nil?
    value_for_option(value_map(:to)[:nil])
  elsif Utils.empty?(value)
    value_for_option(value_map(:to)[:empty], value)
  elsif Utils.uninitialized?(value)
    value_for_option(value_map(:to)[:omitted])
  else
    value
  end
end

#serialize(model, parent = nil, doc = nil, context = nil) ⇒ Object 



298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 298

def serialize(model, parent = nil, doc = nil, context = nil)
  if custom_methods[:to]
    to_method = custom_methods[:to]
    # lutaml-model#550: custom methods may declare a fourth
    # context parameter to receive the options passed to `to_*`.
    if model.method(to_method).parameters.size >= 4
      model.public_send(to_method, model, parent, doc, context)
    else
      model.public_send(to_method, model, parent, doc)
    end
  else
    value = to_value_for(model)

    # Handle Reference types - extract the key for serialization
    # This ensures references serialize as their key, not the resolved object
    if value.is_a?(Lutaml::Model::Type::Reference)
      value = value.key
    elsif value.is_a?(Array)
      # Handle collection of references
      value = value.map do |v|
        v.is_a?(Lutaml::Model::Type::Reference) ? v.key : v
      end
    end

    value
  end
end

#serialize? ⇒ Boolean

Whether this rule participates in serialization output. False marks a hydrate-only mapping: consumed by from_* but never rendered by to_*. (The value callback #serialize is separate.)

Returns:

  • (Boolean) 


188
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 188

def serialize? = @serialize_mapping

#to_value_for(model) ⇒ Object 



288
289
290
291
292
293
294
295
296
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 288

def to_value_for(model)
  if delegate
    model.public_send(delegate).public_send(to)
  else
    return if to.nil?

    model.public_send(to)
  end
end

#transform_value(attribute, value, read_method, format) ⇒ Object 



412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 412

def transform_value(attribute, value, read_method, format)
  # Fast path: no transforms at all (covers 95%+ of rules)
  # transform defaults to {}, so check for actual content, not just truthiness
  has_rule_transform = transform.is_a?(Class)
  has_attr_transform = attribute&.transform.is_a?(Class)
  return value unless has_rule_transform || has_attr_transform

  transformers = get_transformers(attribute)
  transformers = transformers.reverse if read_method == :to

  return value if transformers.empty? || transformers.none? do |t|
    t.can_transform?(read_method, format)
  end

  # Apply transformers in sequence
  transformers.reduce(value) do |v, transformer|
    if transformer.is_a?(Class) && transformer < Lutaml::Model::ValueTransformer
      # Call class method directly: NameTransformer.from(value, :json)
    else
      # Hash/proc transformer
    end
    transformer.public_send(read_method, v, format)
  end
end

#treat?(value) ⇒ Boolean

Returns:

  • (Boolean) 


206
207
208
209
210
211
212
213
214
215
216
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 206

def treat?(value)
  if value.nil?
    treat_nil?
  elsif Utils.uninitialized?(value)
    treat_omitted?
  elsif Utils.empty?(value)
    treat_empty?
  else
    true
  end
end

#treat_as(key, default_value, options = {}) ⇒ Object 



178
179
180
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 178

def treat_as(key, default_value, options = {})
  public_send(key) || options[key] || default_value
end

#treat_empty?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


272
273
274
275
276
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 272

def treat_empty?(options = {})
  return @treat_empty_flag unless options[:nil] || options[:empty] || options[:omitted]

  value_map(:from, options)[:empty] != :omitted
end

#treat_nil?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


266
267
268
269
270
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 266

def treat_nil?(options = {})
  return @treat_nil_flag unless options[:nil] || options[:empty] || options[:omitted]

  value_map(:from, options)[:nil] != :omitted
end

#treat_omitted?(options = {}) ⇒ Boolean

Returns:

  • (Boolean) 


278
279
280
281
282
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 278

def treat_omitted?(options = {})
  return @treat_omitted_flag unless options[:nil] || options[:empty] || options[:omitted]

  value_map(:from, options)[:omitted] != :omitted
end

#value_for_option(option, empty_value = nil) ⇒ Object 



247
248
249
250
251
252
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 247

def value_for_option(option, empty_value = nil)
  return nil if option == :nil
  return empty_value || "" if option == :empty

  Lutaml::Model::UninitializedClass.instance
end

#value_map(key, options = {}) ⇒ Object 



395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 395

def value_map(key, options = {})
  # Fast path: when no overrides, return cached value directly
  # Callers MUST NOT mutate the returned hash
  if !options[:nil] && !options[:empty] && !options[:omitted]
    return @value_map[key]
  end

  # Slow path: merge overrides (only when options have actual values)
  overrides = {
    nil: options[:nil],
    empty: options[:empty],
    omitted: options[:omitted],
  }.compact

  @value_map[key].merge(overrides)
end

#when_attribute ⇒ Object

Static per rule: placeholder __name__ targets and inferred custom-method targets without an attribute type never change — the applier asked this per element and paid two to_s strings each time (240k allocations on the ISO-13849 serialize profile). Rules may be frozen, so no per-instance memo: one to_s instead of two is the frozen-safe diet. Discriminator pairs this rule selects (and re-emits) on, empty for an ordinary rule.



347
348
349
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 347

def when_attribute
  @when_attribute ||= {}.freeze
end

#when_attribute? ⇒ Boolean

Returns:

  • (Boolean) 


351
352
353
 
# File 'lib/lutaml/model/mapping/mapping_rule.rb', line 351

def when_attribute?
  !when_attribute.empty?
end