Class: Lutaml::Xml::Mapping

Inherits:
Model::Mapping show all
Defined in:
lib/lutaml/xml/mapping.rb

Constant Summary collapse

TYPES = 
{
  attribute: :map_attribute,
  element: :map_element,
  content: :map_content,
  all_content: :map_all,
  processing_instruction: :map_processing_instruction,
}.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Model::Mapping

#add_listener, #all_listeners, #duplicate_mappings, #inherit_from, #listeners_for, #omit_element, #omit_listener, #parent_mapping

Constructor Details

#initialize ⇒ Mapping 



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# File 'lib/lutaml/xml/mapping.rb', line 57

def initialize
  super

  @elements = {}
  @attributes = {}
  @element_sequence = []
  @content_mapping = nil
  @raw_mapping = nil
  @mixed_content = false
  @xml_space = nil
  @format = :xml
  @register_elements = ::Hash.new { |h, k| h[k] = {} }
  @register_attributes = ::Hash.new { |h, k| h[k] = {} }
  @register_element_sequences = ::Hash.new { |h, k| h[k] = [] }
  @consolidation_maps = []
  @element_name = nil
  @namespace_class = nil
  @documentation_text = nil
  @type_name_value = nil
  @namespace_scope = []
  @namespace_scope_config = []
  @mapper_class = nil
  @importing_mappings = false
  @attributes_with_methods_defined = Set.new
  @processing_instruction_mappings = []

  # Performance: Caches for finalized mapping queries
  @cached_elements = {}
  @cached_attributes = {}
  @cached_mappings = {}
  @cached_attribute_name_counts = {}
  @finalized = false
end

Instance Attribute Details

#consolidation_maps ⇒ Object (readonly)

Returns the value of attribute consolidation_maps.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def consolidation_maps
  @consolidation_maps
end

#documentation_text ⇒ Object (readonly)

Returns the value of attribute documentation_text.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def documentation_text
  @documentation_text
end

#element_name ⇒ Object (readonly)

Returns the value of attribute element_name.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def element_name
  @element_name
end

#element_sequence ⇒ Object (readonly)

Returns the value of attribute element_sequence.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def element_sequence
  @element_sequence
end

#mapper_class ⇒ Object (readonly)

Returns the value of attribute mapper_class.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def mapper_class
  @mapper_class
end

#mappings_imported ⇒ Object (readonly)

Returns the value of attribute mappings_imported.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def mappings_imported
  @mappings_imported
end

#namespace_class ⇒ Object (readonly)

Returns the value of attribute namespace_class.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def namespace_class
  @namespace_class
end

#namespace_param ⇒ Object (readonly)

Returns the value of attribute namespace_param.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def namespace_param
  @namespace_param
end

#namespace_prefix ⇒ Object (readonly)

Returns the value of attribute namespace_prefix.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def namespace_prefix
  @namespace_prefix
end

#namespace_scope(namespaces = nil) ⇒ Array<Class> (readonly)

Set the namespace scope for this mapping

Controls which namespaces are declared at the root element level versus being declared locally on each element that uses them.

Namespaces listed in namespace_scope will be declared once on the root element. Namespaces not listed will be declared locally on elements where they are used.

Examples:

Simple array of namespace classes (all default to :auto)

namespace_scope [VcardNamespace, DctermsNamespace, DcElementsNamespace]

Per-namespace declaration control

namespace_scope [
  { namespace: VcardNamespace, declare: :always },
  { namespace: DctermsNamespace, declare: :auto },
  XsiNamespace  # Can mix hash and class entries
]



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# File 'lib/lutaml/xml/mapping.rb', line 463

def namespace_scope
  @namespace_scope
end

#namespace_scope_config ⇒ Object

Returns the value of attribute namespace_scope_config.



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# File 'lib/lutaml/xml/mapping.rb', line 1366

def namespace_scope_config
  @namespace_scope_config
end

#namespace_uri ⇒ Object (readonly)

Returns the value of attribute namespace_uri.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def namespace_uri
  @namespace_uri
end

#processing_instruction_mappings ⇒ Object (readonly)

Returns the value of attribute processing_instruction_mappings.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def processing_instruction_mappings
  @processing_instruction_mappings
end

#root_element ⇒ Object (readonly)

Returns the value of attribute root_element.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def root_element
  @root_element
end

#type_name_value ⇒ Object (readonly)

Returns the value of attribute type_name_value.



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# File 'lib/lutaml/xml/mapping.rb', line 41

def type_name_value
  @type_name_value
end

#xml_space(value = nil) ⇒ Symbol? (readonly)

Control the xml:space attribute for this element

When set to :preserve, automatically adds xml:space="preserve" during serialization. When set to :default, adds xml:space="default". When false or nil, no xml:space attribute is added.

Examples:

Add xml:space="preserve"

xml do
  element "text"
  mixed_content
  xml_space :preserve  # Adds xml:space="preserve"
end

Add xml:space="default"

xml do
  element "text"
  xml_space :default
end



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# File 'lib/lutaml/xml/mapping.rb', line 261

def xml_space
  @xml_space
end

Class Method Details

.xml(&block) ⇒ Lutaml::Xml::Mapping

Class-level XML DSL for reusable mapping classes.

When a subclass of Lutaml::Xml::Mapping uses xml do...end in its class body, this method creates an instance and evaluates the block.

Examples:

class BaseMapping < Lutaml::Xml::Mapping
  xml do
    namespace_scope [MyNamespace]
    map_element "Foo", to: :foo
  end
end



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# File 'lib/lutaml/xml/mapping.rb', line 27

def self.xml(&block)
  @xml_instance ||= new
  @xml_instance.instance_eval(&block) if block
  @xml_instance
end

.xml_mapping_instance ⇒ Lutaml::Xml::Mapping?

Get the shared XML mapping instance for this mapping class. Created lazily via the xml() class method.



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# File 'lib/lutaml/xml/mapping.rb', line 37

def self.xml_mapping_instance
  @xml_instance
end

Instance Method Details

#attributes(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1088

def attributes(register_id = nil)
  reg_key = register_id || :default
  cached = @cached_attributes[reg_key]
  return cached if cached

  result = mapping_attributes_hash(register_id).values.flat_map do |v|
    v.is_a?(Array) ? v : [v]
  end
  @cached_attributes[reg_key] = result.freeze if @finalized
  result
end

#attributes_hash ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1340

def attributes_hash
  @attributes
end

#attributes_to_dup ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1427

def attributes_to_dup
  @attributes_to_dup ||= i[
    @content_mapping
    @raw_mapping
    @element_sequence
    @attributes
    @elements
    @processing_instruction_mappings
    @register_elements
    @register_attributes
    @register_element_sequences
    @mappings_imported
    @sequence_importable_mappings
    @consolidation_maps
  ]
end

#consolidate_map(by:, to:, group_class: nil) { ... } ⇒ ConsolidationMap

Declare consolidation rules for this mapping.

Creates a ConsolidationMap that describes how sibling elements are grouped into structured model instances.

Yields:

  • Builder block with gather/dispatch_by or map_element/map_content



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# File 'lib/lutaml/xml/mapping.rb', line 841

def consolidate_map(by:, to:, group_class: nil, &block)
  builder = ::Lutaml::Model::ConsolidationMap::Builder.new(by, to,
                                                           group_class)
  builder.instance_eval(&block)
  @consolidation_maps << builder.build
end

#content_mapping ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1100

def content_mapping
  @content_mapping
end

#decode_html_entities? ⇒ Boolean 



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# File 'lib/lutaml/xml/mapping.rb', line 1357

def decode_html_entities?
  !!@decode_html_entities
end

#deep_dup ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1382

def deep_dup
  self.class.new.tap do |xml_mapping|
    if @root_element
      xml_mapping.root(@root_element.dup, mixed: @mixed_content,
                                          ordered: @ordered)
    end
    if @namespace_class
      xml_mapping.namespace(@namespace_class)
    elsif @namespace_param == :inherit
      xml_mapping.namespace(:inherit)
    elsif @namespace_param == :blank
      xml_mapping.namespace(:blank)
    end

    attributes_to_dup.each do |var_name|
      value = instance_variable_get(var_name)
      # Skip nil values (e.g., @register_elements not yet initialized on fresh copies)
      # Accessor methods will lazily initialize when needed
      next if value.nil?

      xml_mapping.instance_variable_set(var_name, ::Lutaml::Model::Utils.deep_dup(value))
    end
    xml_mapping.instance_variable_set(:@mappings_imported,
                                      ::Hash.new { |h, k| h[k] = false })
    xml_mapping.instance_variable_set(:@register_elements,
                                      ::Hash.new { |h, k| h[k] = {} })
    xml_mapping.instance_variable_set(:@register_attributes,
                                      ::Hash.new { |h, k| h[k] = {} })
    xml_mapping.instance_variable_set(:@register_element_sequences,
                                      ::Hash.new { |h, k| h[k] = [] })
    xml_mapping.instance_variable_set(:@cached_elements, {})
    xml_mapping.instance_variable_set(:@cached_attributes, {})
    xml_mapping.instance_variable_set(:@cached_mappings, {})
    xml_mapping.instance_variable_set(:@finalized, true)
    # CRITICAL: Do NOT copy @mapper_class to the duplicate
    # The duplicate may be used in a different class context
    # and should not carry over the original's mapper_class reference
    xml_mapping.instance_variable_set(:@mapper_class, nil)
  end
end

#documentation(text) ⇒ String

Set documentation text for this mapping

Used for XSD annotation generation.



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# File 'lib/lutaml/xml/mapping.rb', line 482

def documentation(text)
  @documentation_text = text
end

#dup_mappings(mappings) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1444

def dup_mappings(mappings)
  new_mappings = {}

  mappings.each do |key, mapping_rule|
    new_mappings[key] = mapping_rule.deep_dup
  end

  new_mappings
end

#element(name) ⇒ String

Set the XML element name for this mapping

This is the primary method for declaring the element name. Use this for the new clean API.



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# File 'lib/lutaml/xml/mapping.rb', line 205

def element(name)
  @element_name = name
  @root_element = name # Maintain backward compatibility
end

#elements(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1076

def elements(register_id = nil)
  reg_key = register_id || :default
  cached = @cached_elements[reg_key]
  return cached if cached

  result = mapping_elements_hash(register_id).values.flat_map do |v|
    v.is_a?(Array) ? v : [v]
  end
  @cached_elements[reg_key] = result.freeze if @finalized
  result
end

#elements_hash ⇒ Object

Raw hash access for inheritance and deep_dup operations. Callers may mutate the returned hash (e.g., setting keys).



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# File 'lib/lutaml/xml/mapping.rb', line 1336

def elements_hash
  @elements
end

#enable_mixed_content ⇒ Boolean Also known as: mixed_content

Enable mixed content for this element

Mixed content means the element can contain both text nodes and child elements interspersed.



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# File 'lib/lutaml/xml/mapping.rb', line 231

def enable_mixed_content
  @mixed_content = true
  @ordered = true # mixed content implies ordered
end

#ensure_mappings_imported!(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1167

def ensure_mappings_imported!(register_id = nil)
  # CRITICAL: Return immediately if already imported to prevent redundant processing
  # This prevents the exponential explosion of recursive ensure_imports! calls
  # in complex schemas with hundreds of interdependent classes
  register_id ||= Lutaml::Model::Config.default_register

  # Use per-register tracking
  imported_flag = register_id || :default
  return if @mappings_imported[imported_flag]

  # CRITICAL: Prevent re-entrant calls during import processing
  # This prevents infinite loops when importing models that themselves have imports
  # Architecture: Import resolution should be atomic and non-recursive
  return if @importing_mappings

  # Check if there's any work to do - either regular imports OR sequence imports
  return if importable_mappings.empty? && sequence_importable_mappings.empty?

  # Mark as currently importing to prevent re-entrance
  @importing_mappings = true

  # Track if all imports were successfully resolved
  all_resolved = true

  # Process each deferred mapping import
  importable_mappings.dup.each do |model_sym|
    begin
      model_class = Lutaml::Model::GlobalContext.resolve_type(model_sym,
                                                              register_id)
    rescue Lutaml::Model::UnknownTypeError
      # Model not registered yet - skip for now, will retry later
      all_resolved = false
      next
    end

    next if model_class.nil? # Skip if not registered yet

    # Recursively ensure the imported model's imports are resolved
    # Use the child class's own register if it has one
    if model_class.is_a?(Class) && model_class.include?(Lutaml::Model::Serialize)
      child_register = Lutaml::Model::Register.resolve_for_child(
        model_class, register_id
      )
      model_class.ensure_imports!(child_register)
    end

    # Now import the mappings
    import_model_mappings(model_class, register_id)
  end

  # CRITICAL FIX: Process sequence importable mappings
  # Sequence blocks can have their own deferred imports via import_model_mappings
  # These need to be resolved separately because they add attributes to sequences
  unless sequence_importable_mappings.empty?
    sequence_importable_mappings.each do |sequence, model_syms|
      model_syms.dup.each do |model_sym|
        begin
          model_class = Lutaml::Model::GlobalContext.resolve_type(
            model_sym, register_id
          )
        rescue Lutaml::Model::UnknownTypeError
          # Model not registered yet - skip for now
          all_resolved = false
          next
        end

        next if model_class.nil?

        # Recursively ensure the imported model's imports are resolved
        # Use the child class's own register if it has one
        if model_class.is_a?(Class) && model_class.include?(Lutaml::Model::Serialize)
          child_register = Lutaml::Model::Register.resolve_for_child(
            model_class, register_id
          )
          model_class.ensure_imports!(child_register)
        end

        # Now import into the sequence
        # This will call Sequence#import_model_mappings which adds to sequence.attributes
        # and also calls @model.import_model_mappings to add to main mapping
        sequence.import_model_mappings(model_class, register_id)

        # Remove from queue after successful import
        model_syms.delete(model_sym)
      end
    end

    # Clean up empty sequence entries
    sequence_importable_mappings.reject! { |_, models| models.empty? }
  end

  # Mark as fully imported only if both queues are empty
  @mappings_imported[imported_flag] =
    all_resolved && importable_mappings.empty? && sequence_importable_mappings.empty?
ensure
  # CRITICAL: Always reset the importing flag to prevent deadlock
  # Even if an exception occurs, we must allow future import attempts
  @importing_mappings = false
end

#finalize(mapper_class) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 91

def finalize(mapper_class)
  # Store mapper class for later use in deferred imports
  @mapper_class = mapper_class

  # DO NOT auto-generate root element
  # Models should explicitly declare root in their xml block if needed
  # Type-only models (used as nested types) don't need a root element

  # Resolve any deferred mapping imports before finalizing
  ensure_mappings_imported!

  # lutaml-model#687: nested sequence choices tag their target
  # model attributes now that the mapper class is known.
  @element_sequence.each do |seq|
    seq.bind_choice_compositors!(mapper_class)
  end

  # lutaml-model#296: a mapped rule whose attribute type can never
  # accept the serialization shape fails here, with the attribute
  # and type named, instead of surfacing mid-parse as a cast oddity.
  validate_mapped_attribute_types!(mapper_class)

  # Validate mixed content requires collection attribute for content mapping
  validate_mixed_content_collection!(mapper_class)

  # Validate element-only content models do not use map_content
  validate_ordered_content_mapping!(mapper_class)

  # Performance: Clear caches and mark finalized
  @cached_elements.clear
  @cached_attributes.clear
  @cached_mappings.clear
  @cached_attribute_name_counts.clear
  @rule_records_version = (@rule_records_version || 0) + 1
  @finalized = true
end

#finalized? ⇒ Boolean 



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# File 'lib/lutaml/xml/mapping.rb', line 134

def finalized?
  @finalized
end

#find_attribute(name) ⇒ MappingRule?

Find attribute mapping rule by attribute name



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# File 'lib/lutaml/xml/mapping.rb', line 1283

def find_attribute(name)
  attributes.detect { |rule| name == rule.to }
end

#find_by_name(name, type: "Text", node_type: nil, namespace_uri: nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1287

def find_by_name(name, type: "Text", node_type: nil, namespace_uri: nil)
  # If node_type is provided, use it for type detection (preferred)
  if node_type && i[text cdata].include?(node_type)
    content_mapping
  # Backward compatibility: still check name for old code that doesn't pass node_type
  elsif ["text", "#cdata-section"].include?(name.to_s) && type == "Text"
    content_mapping
  else
    candidates = mappings.select do |rule|
      rule.name == name.to_s || rule.name == name.to_sym
    end
    return candidates.first if namespace_uri.nil? || candidates.one?

    candidates.find do |r|
      r.namespace_class&.uri == namespace_uri
    end || candidates.first
  end
end

#find_by_to(to) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1306

def find_by_to(to)
  mappings.detect { |rule| rule.to.to_s == to.to_s }
end

#find_by_to!(to) ⇒ Object

Raises:



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# File 'lib/lutaml/xml/mapping.rb', line 1310

def find_by_to!(to)
  mapping = find_by_to(to)

  return mapping if !!mapping

  raise Lutaml::Model::NoMappingFoundError.new(to.to_s)
end

#find_element(name, register_id = nil) ⇒ MappingRule?

Find element mapping rule by attribute name



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# File 'lib/lutaml/xml/mapping.rb', line 1275

def find_element(name, register_id = nil)
  elements(register_id).detect { |rule| name == rule.to }
end

#html_entities(enabled: true) ⇒ Object

lutaml-model#154: opt-in decoding of HTML named/numeric entities (e.g. ©, —) in mapped text and attribute values. XML documents are otherwise kept byte-faithful: HTML entities are not defined in XML without a DTD.



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# File 'lib/lutaml/xml/mapping.rb', line 1353

def html_entities(enabled: true)
  @decode_html_entities = enabled
end

#import_model_mappings(model, register_id = nil) ⇒ Object

Import mappings from another model. For default register: imports BOTH attributes (into @mapper_class) AND mappings. For non-default register: stores mappings in register-specific storage (@register_elements, @register_attributes).

Raises:



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# File 'lib/lutaml/xml/mapping.rb', line 855

def import_model_mappings(model, register_id = nil)
  register_id ||= Lutaml::Model::Config.default_register
  reg_id = register_id
  return import_mappings_later(model, reg_id) if model_importable?(model)
  raise Lutaml::Model::ImportModelWithRootError.new(model) if model.root?(reg_id)

  if register_id != :default
    register_only_import_model_mappings(model, register_id)
    return
  end

  # CRITICAL: Access raw mapping structure directly without triggering import resolution
  # Calling model.mappings_for() can trigger ensure_imports! on that model
  # which creates circular chains: A imports B, B's mappings_for imports C, C imports A
  # Architecture: Access data structure directly, don't call methods that trigger resolutions
  mappings = model.instance_variable_get(:@mappings)&.dig(:xml)
  return unless mappings # Skip if no XML mappings defined

  # ATOMIC IMPORT: Both object model (attributes) AND serialization mappings
  # This mimics XSD complexType composition where importing a type means
  # getting both its structure (attributes) and serialization rules (mappings)

  # 1. Import object model (attributes with accessors)
  #    This defines the data structure of the model
  # CRITICAL: Access attributes directly to avoid triggering ensure_imports!
  imported_attributes = ::Lutaml::Model::Utils.deep_dup(model.instance_variable_get(:@attributes)&.values || [])
  if @mapper_class
    imported_attributes.each do |attr|
      # CRITICAL: Check LOCAL set to avoid calling @mapper_class.attributes()
      # which can trigger ensure_imports! and create circular calls
      unless @attributes_with_methods_defined.include?(attr.name)
        # Define accessor methods on the model class
        @mapper_class.define_attribute_methods(attr, reg_id)
        @attributes_with_methods_defined.add(attr.name)
      end
    end
    # Merge attributes data - use direct access to avoid triggering imports
    attrs_hash = imported_attributes.to_h { |attr| [attr.name, attr] }
    existing_attrs = @mapper_class.instance_variable_get(:@attributes) || {}
    attrs_hash.each do |name, attr|
      if existing_attrs.key?(name)
        existing_attrs[name].options.merge!(attr.options)
      else
        existing_attrs[name] = attr
      end
    end
    @mapper_class.instance_variable_set(:@attributes, existing_attrs)
  end

  # 2. Import serialization mappings (XML element/attribute names → model attributes)
  #    This defines how the data structure maps to/from XML
  # CRITICAL: Deep-copy mapping rules to prevent shared state
  # When multiple classes import the same model, each must have independent MappingRule instances
  # Otherwise, any state mutation during serialization affects ALL importing classes
  @elements.merge!(dup_mappings(mappings.instance_variable_get(:@elements)))
  @attributes.merge!(dup_mappings(mappings.instance_variable_get(:@attributes)))
  # CRITICAL: Deep-copy sequences to prevent shared state
  # Each importing class must have its own Sequence objects
  imported_sequences = mappings.element_sequence.map do |seq|
    seq.deep_dup(self)
  end
  (@element_sequence << imported_sequences).flatten!
end

#importable_mappings ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1163

def importable_mappings
  @importable_mappings ||= []
end

#map_all(to:, render_nil: false, render_default: false, delegate: nil, with: {}, namespace: (namespace_set = false nil), prefix: (prefix_provided = false nil), render_empty: false) ⇒ Object Also known as: map_all_content 



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# File 'lib/lutaml/xml/mapping.rb', line 746

def map_all(
  to:,
render_nil: false,
render_default: false,
delegate: nil,
with: {},
namespace: (namespace_set = false
            nil),
prefix: (prefix_provided = false
         nil),
render_empty: false
)
  validate!(
    ::Lutaml::Model::Constants::RAW_MAPPING_KEY,
    to,
    with,
    render_nil,
    render_empty,
    type: TYPES[:all_content],
  )

  # Warn if prefix parameter is provided
  if prefix_provided != false
    warn "[DEPRECATED] The prefix parameter on map_all is deprecated. " \
         "Define prefix_default in your XmlNamespace class instead. " \
         "Prefix '#{prefix}' will be ignored."
  end

  # Raise error if namespace parameter is provided
  if namespace_set != false
    raise Lutaml::Model::IncorrectMappingArgumentsError,
          "namespace is not allowed at map_all level. " \
          "Namespaces must be declared on the MODEL CLASS itself using 'namespace' at the xml block level."
  end

  rule = MappingRule.new(
    ::Lutaml::Model::Constants::RAW_MAPPING_KEY,
    to: to,
    render_nil: render_nil,
    render_default: render_default,
    with: with,
    delegate: delegate,
    namespace: namespace,
    default_namespace: namespace_uri,
    namespace_set: namespace_set != false,
  )

  @raw_mapping = rule
end

#map_attribute(name, to: nil, render_nil: false, render_default: false, render_empty: false, with: {}, delegate: nil, polymorphic_map: {}, namespace: (namespace_set = false nil), prefix: (prefix_provided = false nil), transform: {}, value_map: {}, as_list: nil, delimiter: nil, form: nil, documentation: nil, xsd_type: (xsd_type_provided = false nil)) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 610

def map_attribute(
  name,
to: nil,
render_nil: false,
render_default: false,
render_empty: false,
with: {},
delegate: nil,
polymorphic_map: {},
namespace: (namespace_set = false
            nil),
prefix: (prefix_provided = false
         nil),
transform: {},
value_map: {},
as_list: nil,
delimiter: nil,
form: nil,
documentation: nil,
xsd_type: (xsd_type_provided = false
           nil)
)
  validate!(
    name, to, with, render_nil, render_empty, type: TYPES[:attribute]
  )

  # Warn if prefix parameter is provided
  if prefix_provided != false
    warn "[DEPRECATED] The prefix parameter on map_attribute is deprecated. " \
         "Define prefix_default in your XmlNamespace class instead. " \
         "Prefix '#{prefix}' will be ignored."
  end

  # Raise error if xsd_type parameter is provided
  if xsd_type_provided != false
    raise Lutaml::Model::IncorrectMappingArgumentsError,
          "xsd_type is not allowed at mapping level. " \
          "XSD type must be declared in Type::Value classes using the xsd_type directive. " \
          "See docs/migration-guides/xsd-type-migration.adoc"
  end

  # Raise error if namespace parameter is a non-nil value at attribute level
  # This is NOT allowed - namespaces should be declared at model level
  # However, namespace: nil is allowed to explicitly opt out of namespace
  # Note: namespace_set is false when default is used, nil when explicit arg passed
  if namespace_set != false && !namespace.nil?
    raise Lutaml::Model::IncorrectMappingArgumentsError,
          "namespace is not allowed at attribute mapping level. " \
          "Namespaces should be declared on the MODEL CLASS itself using 'namespace' at the xml block level."
  end

  if name == "schemaLocation"
    location = caller_locations(1, 1)[0]
    caller_file = if defined?(File)
                    File.basename(location.path)
                  else
                    location.path.to_s.split("/").last
                  end
    ::Lutaml::Model::Logger.warn_auto_handling(
      name: name,
      caller_file: caller_file,
      caller_line: location.lineno,
    )
  end

  rule = MappingRule.new(
    name,
    to: to,
    render_nil: render_nil,
    render_default: render_default,
    render_empty: render_empty,
    with: with,
    delegate: delegate,
    namespace: namespace,
    attribute: true,
    polymorphic_map: polymorphic_map,
    default_namespace: namespace_uri,
    namespace_set: namespace_set != false,
    transform: transform,
    value_map: value_map,
    as_list: as_list,
    delimiter: delimiter,
    form: form,
    documentation: documentation,
  )
  # Use eql? to detect and skip exact duplicates (prevents accumulation)
  key = rule.namespaced_name
  existing = @attributes[key]

  if existing.nil?
    # New mapping - store directly
    @attributes[key] = rule
  elsif existing.is_a?(Array)
    # Array exists - check for duplicate or add
    duplicate_index = existing.find_index { |r| r.eql?(rule) }
    # Only add if not a duplicate
    existing << rule unless duplicate_index
  elsif existing.eql?(rule)
    # Exact duplicate - already stored, no action needed
  else
    # Different mapping (polymorphic) - convert to array
    @attributes[key] = [existing, rule]
  end
end

#map_content(to: nil, render_nil: false, render_default: false, render_empty: false, with: {}, delegate: nil, mixed: false, cdata: false, transform: {}, value_map: {}) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 715

def map_content(
  to: nil,
render_nil: false,
render_default: false,
render_empty: false,
with: {},
delegate: nil,
mixed: false,
cdata: false,
transform: {},
value_map: {}
)
  validate!(
    "content", to, with, render_nil, render_empty, type: TYPES[:content]
  )

  @content_mapping = MappingRule.new(
    nil,
    to: to,
    render_nil: render_nil,
    render_default: render_default,
    render_empty: render_empty,
    with: with,
    delegate: delegate,
    mixed_content: mixed,
    cdata: cdata,
    transform: transform,
    value_map: value_map,
  )
end

#map_element(name, to: nil, render_nil: false, render_default: false, render_empty: false, treat_nil: :nil, treat_empty: :empty, treat_omitted: :nil, with: {}, delegate: nil, cdata: false, polymorphic: {}, namespace: (namespace_set = false nil), prefix: (prefix_provided = false nil), transform: {}, value_map: {}, form: nil, documentation: nil, xsd_type: (xsd_type_provided = false nil), raw: nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 511

def map_element(
  name,
to: nil,
render_nil: false,
render_default: false,
render_empty: false,
treat_nil: :nil,
treat_empty: :empty,
treat_omitted: :nil,
with: {},
delegate: nil,
cdata: false,
polymorphic: {},
namespace: (namespace_set = false
            nil),
prefix: (prefix_provided = false
         nil),
transform: {},
value_map: {},
form: nil,
documentation: nil,
xsd_type: (xsd_type_provided = false
           nil),
raw: nil
)
  validate!(
    name, to, with, render_nil, render_empty, type: TYPES[:element]
  )

  # Warn if prefix parameter is provided
  if prefix_provided != false
    warn "[DEPRECATED] The prefix parameter on map_element is deprecated. " \
         "Define prefix_default in your XmlNamespace class instead. " \
         "Prefix '#{prefix}' will be ignored."
  end

  # Raise error if xsd_type parameter is provided
  if xsd_type_provided != false
    raise Lutaml::Model::IncorrectMappingArgumentsError,
          "xsd_type is not allowed at mapping level. " \
          "XSD type must be declared in Type::Value classes using the xsd_type directive. " \
          "See docs/migration-guides/xsd-type-migration.adoc"
  end

  # Raise error if namespace parameter is a non-nil value at element level
  # This is NOT allowed - namespaces should be declared at model level
  # However, namespace: nil is allowed to explicitly opt out of namespace
  # Note: namespace_set is false when default is used, nil when explicit arg passed
  if namespace_set != false && !namespace.nil?
    raise Lutaml::Model::IncorrectMappingArgumentsError,
          "namespace is not allowed at element mapping level. " \
          "Namespaces must be declared on the MODEL CLASS itself using 'namespace' at the xml block level. " \
          "Each model class should declare its own namespace, not individual elements."
  end

  rule = MappingRule.new(
    name,
    to: to,
    render_nil: render_nil,
    render_default: render_default,
    render_empty: render_empty,
    treat_nil: treat_nil,
    treat_empty: treat_empty,
    treat_omitted: treat_omitted,
    with: with,
    delegate: delegate,
    cdata: cdata,
    namespace: namespace,
    default_namespace: namespace_uri,
    polymorphic: polymorphic,
    namespace_set: namespace_set != false || namespace == :inherit,
    transform: transform,
    value_map: value_map,
    form: form,
    documentation: documentation,
    raw: raw,
  )
  # Store rules with the same element name in an array to support
  # multiple mapping rules for the same element name with different target types
  # Use eql? to detect and skip exact duplicates (prevents accumulation)
  key = rule.namespaced_name
  existing = @elements[key]

  if existing.nil?
    # New mapping - store directly
    @elements[key] = rule
  elsif existing.is_a?(Array)
    # Array exists - check for duplicate or add
    duplicate_index = existing.find_index { |r| r.eql?(rule) }
    # Only add if not a duplicate
    existing << rule unless duplicate_index
  elsif existing.eql?(rule)
    # Exact duplicate - already stored, no action needed
  else
    # Different mapping (polymorphic) - convert to array
    @elements[key] = [existing, rule]
  end
end

#map_instances(to:, polymorphic: {}) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 507

def map_instances(to:, polymorphic: {})
  map_element(to, to: to, polymorphic: polymorphic)
end

#map_processing_instruction(target, to:) ⇒ Object

Map XML processing instructions with a given target to a model attribute.

During serialization, the attribute value (Hash) is expanded into individual PIs: each key-value pair generates <?target key="value"?>. During deserialization, PIs with matching target are parsed into the hash.

Examples:

xml do
  element "rfc"
  map_processing_instruction "rfc", to: :pi_settings
end

# With pi_settings = { "strict" => "yes", "compact" => "yes" }
# generates:
# <?rfc strict="yes"?>
# <?rfc compact="yes"?>
# <rfc>...</rfc>



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# File 'lib/lutaml/xml/mapping.rb', line 818

def map_processing_instruction(target, to:)
  @processing_instruction_mappings << ProcessingInstructionMapping.new(
    target.to_s, to
  )
end

#mapping_attributes_hash(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1318

def mapping_attributes_hash(register_id = nil)
  if register_id.nil? || register_id == :default
    @attributes
  else
    @attributes.merge(@register_attributes[register_id])
  end
end

#mapping_elements_hash(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1326

def mapping_elements_hash(register_id = nil)
  if register_id.nil? || register_id == :default
    @elements
  else
    @elements.merge(@register_elements[register_id])
  end
end

#mappings(register_id = nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1128

def mappings(register_id = nil)
  reg_key = register_id || :default
  cached = @cached_mappings[reg_key]
  return cached if cached

  result = elements(register_id) + attributes(register_id) + [content_mapping,
                                                              raw_mapping].compact
  @cached_mappings[reg_key] = result.freeze if @finalized
  result
end

#merge_elements_sequence(mapping) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1376

def merge_elements_sequence(mapping)
  mapping.element_sequence.each do |sequence|
    element_sequence << sequence_dup(sequence)
  end
end

#mixed_content? ⇒ Boolean

Check if mixed content is enabled



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

def mixed_content?
  @mixed_content || false
end

#namespace(ns_class_or_symbol, _deprecated_prefix = nil) ⇒ void

This method returns an undefined value.

Set the XML namespace for this mapping

Examples:

Using XmlNamespace class (REQUIRED)

namespace ContactNamespace

Using :inherit to inherit parent namespace

namespace :inherit

Using :blank for explicit no namespace

namespace :blank

Raises:



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# File 'lib/lutaml/xml/mapping.rb', line 374

def namespace(ns_class_or_symbol, _deprecated_prefix = nil)
  # Only raise error for explicitly marked no_root (using deprecated method)
  # Type-only models (no element declared) CAN have namespaces
  raise Lutaml::Model::TypeOnlyNamespaceError if @no_root

  # Warn if prefix parameter is provided
  if _deprecated_prefix
    warn "[DEPRECATED] The prefix parameter on namespace() is deprecated. " \
         "Define prefix_default in your XmlNamespace class instead. " \
         "Prefix '#{_deprecated_prefix}' will be ignored."
  end

  # Handle :blank symbol - explicit blank namespace
  if ns_class_or_symbol == :blank
    @namespace_class = nil
    @namespace_uri = nil
    @namespace_prefix = nil
    @namespace_set = true # Mark as explicitly set
    @namespace_param = :blank # Store original value
    return
  end

  # Handle :inherit symbol
  if ns_class_or_symbol == :inherit
    @namespace_set = true
    @namespace_param = :inherit
    return
  end

  # nil means "not set" - DON'T set @namespace_set
  if ns_class_or_symbol.nil?
    @namespace_class = nil
    @namespace_uri = nil
    @namespace_prefix = nil
    @namespace_set = false # Explicitly NOT set
    @namespace_param = nil
    return
  end

  # Accept both Lutaml::Xml::Namespace and Lutaml::Model::Xml::Namespace for compatibility
  is_namespace_class = ns_class_or_symbol.is_a?(Class) && (
    (defined?(::Lutaml::Xml::Namespace) && ns_class_or_symbol < ::Lutaml::Xml::Namespace) ||
    (defined?(::Lutaml::Model::Xml::Namespace) && ns_class_or_symbol < ::Lutaml::Model::Xml::Namespace)
  )

  if is_namespace_class
    # XmlNamespace class passed - register and use
    @namespace_class = NamespaceClassRegistry.instance.register_named(ns_class_or_symbol)
    @namespace_uri = ns_class_or_symbol.uri
    @namespace_prefix = ns_class_or_symbol.prefix_default
  elsif ns_class_or_symbol.is_a?(String)
    # String URI - NOT SUPPORTED
    raise Lutaml::Xml::Error::InvalidNamespaceError.new(
      expected: "XmlNamespace class",
      got: ns_class_or_symbol,
      message: "String namespace URIs are not supported. " \
               "Define an XmlNamespace class instead. " \
               "See docs/_guides/xml-namespaces.adoc for migration guide.",
    )
  else
    raise Lutaml::Xml::Error::InvalidNamespaceError.new(
      expected: "XmlNamespace class, :inherit, or :blank",
      got: ns_class_or_symbol,
    )
  end
end

#namespace_class? ⇒ Boolean

Whether namespace_class was explicitly set (not nil)



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# File 'lib/lutaml/xml/mapping.rb', line 1345

def namespace_class?
  !@namespace_class.nil?
end

#namespace_set? ⇒ Boolean

Whether namespace was explicitly set via DSL



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# File 'lib/lutaml/xml/mapping.rb', line 1362

def namespace_set?
  !!@namespace_set
end

#no_element? ⇒ Boolean

Check if this mapping has no element declaration



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# File 'lib/lutaml/xml/mapping.rb', line 345

def no_element?
  !element_name
end

#no_root ⇒ Object

Deprecated.

Use absence of element() declaration and type_name() instead

Mark this model as having no root element (type-only)



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# File 'lib/lutaml/xml/mapping.rb', line 324

def no_root
  warn "[Lutaml::Model] DEPRECATED: no_root is deprecated. " \
       "Simply omit the element declaration for type-only models. " \
       "Use type_name() to set the XSD type name."
  @no_root = true
end

#no_root? ⇒ Boolean

Check if this mapping has no root element

Returns true if:

  • The deprecated @no_root flag is explicitly set, OR
  • No element is declared (modern pattern - just omit element() call)


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# File 'lib/lutaml/xml/mapping.rb', line 338

def no_root?
  !!@no_root || no_element?
end

#on_attribute(name, id: nil, &block) ⇒ void

This method returns an undefined value.

Add a complex listener for an XML attribute with a custom handler block.

Examples:

class MyMapping < Lutaml::Xml::Mapping
  on_attribute "xmlAttr", id: :parse_attr do |element, context|
    context[:custom] = element["xmlAttr"]
  end
end



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# File 'lib/lutaml/xml/mapping.rb', line 1506

def on_attribute(name, id: nil, &block)
  add_listener(Lutaml::Xml::Listener.new(
                 target: name,
                 id: id,
                 handler: block,
               ))
end

#on_element(name, id: nil, &block) ⇒ void

This method returns an undefined value.

Add a complex listener for an XML element with a custom handler block.

Unlike map_element which creates a simple listener (framework handles deserialization), on_element allows custom deserialization logic.

Multiple listeners for the same element are allowed — all matching listeners are invoked during parsing.

Examples:

Custom deserialization

class MyMapping < Lutaml::Xml::Mapping
  on_element "CustomElement", id: :custom_parse do |element, context|
    context[:custom] = CustomParser.parse(element)
  end
end

Multiple listeners for same element

class MyMapping < Lutaml::Xml::Mapping
  on_element "Documentation", id: :parse_docs do |element, context|
    context[:documentation] = Documentation.from_xml(element)
  end

  on_element "Documentation", id: :log_docs do |element, context|
    logger.info("Parsing docs: #{element.text}")
  end
end



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# File 'lib/lutaml/xml/mapping.rb', line 1485

def on_element(name, id: nil, &block)
  add_listener(Lutaml::Xml::Listener.new(
                 target: name,
                 id: id,
                 handler: block,
               ))
end

#ordered ⇒ Boolean

Enable ordered content for this element

Ordered content means element order is preserved during round-trip serialization without validation. This is different from sequence which enforces and validates order.

Use this when:

  • Element order matters for your application
  • You need to preserve input order exactly
  • You DON'T want to validate/enforce specific order

Use sequence when you need strict order validation.



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# File 'lib/lutaml/xml/mapping.rb', line 313

def ordered
  @ordered = true
end

#ordered? ⇒ Boolean?

Return whether this mapping uses ordered content



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# File 'lib/lutaml/xml/mapping.rb', line 194

def ordered?
  @ordered
end

#plain_element_rules_by_attr(register_id = nil) ⇒ Hash{Symbol, String => Array<MappingRule>}

lutaml-model#765: plain element rules grouped by target attribute name, for spelling-tolerance mapping (several element names feeding one attribute). Cached per register so the parse hot path only pays a hash lookup. Grouping uses rule-level properties only — the transform applies the collection-attribute filter.



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# File 'lib/lutaml/xml/mapping.rb', line 1146

def plain_element_rules_by_attr(register_id = nil)
  reg_key = register_id || :default
  @plain_element_rules_by_attr ||= {}
  @plain_element_rules_by_attr[reg_key] ||= begin
    grouped = {}
    mappings(reg_key).each do |r|
      next if r.attribute? || r.raw_mapping? || r.content_mapping? ||
        r.cdata || r.has_custom_method_for_deserialization? ||
        (r.transform.is_a?(Hash) && !r.transform.empty?) ||
        r.transform.is_a?(Class)

      (grouped[r.to] ||= []) << r
    end
    grouped
  end
end

#polymorphic_mapping ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1423

def polymorphic_mapping
  mappings.find(&:polymorphic_mapping?)
end

#prefixed_root ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 349

def prefixed_root
  if namespace_uri && namespace_prefix
    "#{namespace_prefix}:#{root_element}"
  else
    root_element
  end
end

#preserve_whitespace? ⇒ Boolean

Whether this mapping should auto-add xml:space="preserve"



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# File 'lib/lutaml/xml/mapping.rb', line 269

def preserve_whitespace?
  @xml_space == :preserve
end

#raw_mapping ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1104

def raw_mapping
  @raw_mapping
end

#root(name, mixed: false, ordered: false) ⇒ String

Set the root element name with optional configuration

This is kept as an alias to element() for backward compatibility, but also supports the mixed: and ordered: options.



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# File 'lib/lutaml/xml/mapping.rb', line 219

def root(name, mixed: false, ordered: false)
  element(name)
  @mixed_content = mixed
  @ordered = ordered || mixed # mixed content is always ordered
end

#root? ⇒ Boolean 



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# File 'lib/lutaml/xml/mapping.rb', line 317

def root?
  !!root_element
end

#rule_records_version ⇒ Object

Bumped at finalize; ModelTransform's compiled rule records are keyed on it so late mapping changes rebuild instead of going stale.



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# File 'lib/lutaml/xml/mapping.rb', line 130

def rule_records_version
  @rule_records_version ||= 0
end

#sequence(&block) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 824

def sequence(&block)
  @element_sequence << ::Lutaml::Model::Sequence.new(self,
                                                     format: :xml).tap do |s|
    s.instance_eval(&block)
  end
end

#sequence_dup(sequence) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1368

def sequence_dup(sequence)
  Lutaml::Model::Sequence.new(self, format: :xml).tap do |instance|
    sequence.attributes.each do |attr|
      instance.attributes << attr.deep_dup
    end
  end
end

#sequence_importable_mappings ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 1267

def sequence_importable_mappings
  @sequence_importable_mappings ||= ::Hash.new { |h, k| h[k] = [] }
end

#set_mappings_imported(value) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 936

def set_mappings_imported(value)
  if @mappings_imported.is_a?(Hash)
    @mappings_imported.each_key { |k| @mappings_imported[k] = value }
  else
    @mappings_imported = value
  end
end

#sole_local_attribute_claimant?(rule, register_id = nil) ⇒ Boolean

lutaml-model#790/#791: whether rule is the only attribute rule claiming its exact name spelling. The answer is a property of the mapping, not the document, so it is counted once per register (rules sharing a spelling make each other non-sole).



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# File 'lib/lutaml/xml/mapping.rb', line 1112

def sole_local_attribute_claimant?(rule, register_id = nil)
  reg_key = register_id || :default
  counts = @cached_attribute_name_counts[reg_key]
  unless counts
    counts = {}
    attributes(register_id).each do |r|
      key = r.name_strings
      counts[key] = (counts[key] || 0) + 1
    end
    counts.freeze if @finalized
    @cached_attribute_name_counts[reg_key] = counts
  end

  (counts[rule.name_strings] || 1) == 1
end

#type_name(name = nil) ⇒ String? Also known as: xsd_type

Set explicit type name for XSD generation

By default, type name is inferred as "ClassNameType". Use this to override.



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# File 'lib/lutaml/xml/mapping.rb', line 493

def type_name(name = nil)
  @type_name_value = name if name
  @type_name_value
end

#validate!(key, to, with, render_nil, render_empty, type: nil) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 944

def validate!(key, to, with, render_nil, render_empty, type: nil)
  validate_raw_mappings!(type)
  validate_to_and_with_arguments!(key, to, with)

  if render_nil == :as_empty || render_empty == :as_empty
    raise ::Lutaml::Model::IncorrectMappingArgumentsError.new(
      ":as_empty is not supported for XML mappings. " \
      "Use :as_blank instead to create blank XML elements.",
    )
  end
end

#validate_mapped_attribute_types!(mapper_class) ⇒ Object

Fire InvalidAttributeTypeError at definition time for mapped rules whose target attribute type is neither a Type::Value nor Serializable (lutaml-model#296). Undeclared types are left to deferred-import resolution.



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# File 'lib/lutaml/xml/mapping.rb', line 1060

def validate_mapped_attribute_types!(mapper_class)
  (elements + attributes).each do |rule|
    target = mapper_class.attributes[rule.to]
    next unless target

    begin
      resolved = target.type(Lutaml::Model::Config.default_register)
    rescue Lutaml::Model::UnknownTypeError
      next
    end
    next unless resolved.is_a?(Class)

    target.validate_attr_type!(resolved)
  end
end

#validate_mixed_content_collection!(mapper_class) ⇒ Object

Validate that mixed content models have a collection attribute for their content mapping. When mixed_content is enabled, the XML element can contain interleaved text and child elements, resulting in multiple text nodes. The content attribute must be a string collection to hold all of them; otherwise only the first text node is preserved.

Raises:



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# File 'lib/lutaml/xml/mapping.rb', line 143

def validate_mixed_content_collection!(mapper_class)
  return unless @mixed_content && @content_mapping

  attr_name = @content_mapping.to
  return unless attr_name

  # Follow delegate chain to find the actual attribute definition
  delegate = @content_mapping.delegate
  attr_def = if delegate
               delegate_obj = mapper_class.attributes[delegate]
               delegate_obj&.type&.attributes&.dig(attr_name) if delegate_obj&.type.is_a?(Class) && delegate_obj&.type.include?(Lutaml::Model::Serialize)
             else
               mapper_class.attributes[attr_name]
             end
  return unless attr_def
  return if attr_def.collection?

  raise Lutaml::Model::MixedContentCollectionError.new(attr_name,
                                                       mapper_class)
end

#validate_namespace_prefix!(prefix) ⇒ void

This method returns an undefined value.

Validate namespace prefix parameter

Raises ArgumentError if prefix is Hash or Array, which indicates the common mistake of passing options as prefix.

Raises:

  • (ArgumentError) —

    if prefix is Hash or Array



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# File 'lib/lutaml/xml/mapping.rb', line 1001

def validate_namespace_prefix!(prefix)
  if prefix.is_a?(Hash) || prefix.is_a?(Array)
    raise ArgumentError,
          "namespace prefix must be a String or Symbol, not #{prefix.class}. " \
          "Did you mean to use 'root' with mixed: true?"
  end
end

#validate_namespace_scope!(namespaces) ⇒ void

This method returns an undefined value.

Validate namespace_scope parameter

Ensures all items are XmlNamespace classes or valid Hash entries

Raises:

  • (ArgumentError) —

    if invalid namespace classes provided



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# File 'lib/lutaml/xml/mapping.rb', line 1016

def validate_namespace_scope!(namespaces)
  unless namespaces.is_a?(Array)
    raise ArgumentError,
          "namespace_scope must be an Array of XmlNamespace classes, " \
          "got #{namespaces.class}"
  end

  namespaces.each do |ns|
    if ns.is_a?(Class)
      unless ns < Lutaml::Xml::Namespace
        raise ArgumentError,
              "namespace_scope must contain only XmlNamespace classes, " \
              "got #{ns}"
      end
    elsif ns.is_a?(::Hash)
      ns_class = ns[:namespace]
      unless ns_class.is_a?(Class) && ns_class < Lutaml::Xml::Namespace
        raise ArgumentError,
              "namespace_scope Hash entry must have :namespace key " \
              "with XmlNamespace class, got #{ns_class.class}"
      end

      # Validate :declare option if present
      if ns.key?(:declare)
        declare_value = ns[:declare]
        valid_modes = i[auto always never]
        unless valid_modes.include?(declare_value)
          raise ArgumentError,
                "namespace_scope Hash entry :declare must be one of " \
                "#{valid_modes.inspect}, got #{declare_value.inspect}"
        end
      end
    else
      raise ArgumentError,
            "namespace_scope must contain only XmlNamespace classes or Hashes, " \
            "got #{ns.class}"
    end
  end
end

#validate_ordered_content_mapping!(mapper_class) ⇒ Object

Raises:



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# File 'lib/lutaml/xml/mapping.rb', line 164

def validate_ordered_content_mapping!(mapper_class)
  return unless @ordered && !@mixed_content && @content_mapping

  raise Lutaml::Model::OrderedContentMappingError.new(mapper_class)
end

#validate_raw_mappings!(type) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 976

def validate_raw_mappings!(type)
  if !@raw_mapping.nil? && type != TYPES[:attribute]
    raise StandardError, "#{type} is not allowed, only #{TYPES[:attribute]} " \
                         "is allowed with #{TYPES[:all_content]}"
  end

  if type == TYPES[:all_content] &&
      !(elements.empty? && content_mapping.nil?)
    # lutaml-model#223: map_all may coexist with mapped siblings.
    # The raw capture receives only the UNCLAIMED content — the
    # verbatim subtree minus children matched by element rules.
    # The historical exclusivity raised here; the coexistence
    # contract is enforced by scoped capture on parse and
    # remainder-after-mapped emission on serialize.
  end
end

#validate_to_and_with_arguments!(key, to, with) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 956

def validate_to_and_with_arguments!(key, to, with)
  if to.nil? && with.empty?
    raise ::Lutaml::Model::IncorrectMappingArgumentsError.new(
      ":to or :with argument is required for mapping '#{key}'",
    )
  end

  validate_with_options!(key, to, with)
end

#validate_with_options!(key, to, with) ⇒ Object 



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# File 'lib/lutaml/xml/mapping.rb', line 966

def validate_with_options!(key, to, with)
  return true if to

  if !with.empty? && (with[:from].nil? || with[:to].nil?)
    raise ::Lutaml::Model::IncorrectMappingArgumentsError.new(
      ":with argument for mapping '#{key}' requires :to and :from keys",
    )
  end
end

#w3c_attributes(*attrs) ⇒ Object

Convenience method for standard W3C XML attributes

Automatically creates attribute mappings for attributes that use W3C types. The attribute must already be declared with a W3C type.

Available options: :lang, :space, :base, :id

Examples:

class Paragraph < Lutaml::Model::Serializable
  attribute :lang, Lutaml::Xml::W3c::XmlLangType
  attribute :space, Lutaml::Xml::W3c::XmlSpaceType
  attribute :content, :string

  xml do
    element "p"
    w3c_attributes :lang, :space  # Maps to xml:lang and xml:space
    map_content to: :content
  end
end



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# File 'lib/lutaml/xml/mapping.rb', line 293

def w3c_attributes(*attrs)
  attrs.each do |attr|
    map_attribute attr.to_s, to: attr
  end
end