Module: Lutaml::Lml::Executor::AdapterHelpers

Included in:
CsvAdapter, XmlAdapter
Defined in:
lib/lutaml/lml/executor/adapter_helpers.rb

Overview

Shared helpers for the I/O adapters. Both CsvAdapter and XmlAdapter need to:

- resolve a `map_to` reference to a compiled class
- look up attribute values by name in an import/export definition
- find the compiled class that an instance belongs to (for export)

This module owns those three concerns so each adapter can stay focused on its format-specific I/O.

Instance Method Summary collapse

Instance Method Details

#attribute_value(attributes, name) ⇒ Object

Returns the string value of the named attribute, or nil.



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# File 'lib/lutaml/lml/executor/adapter_helpers.rb', line 26

def attribute_value(attributes, name)
  attr = find_attribute(attributes, name)
  attr ? attr.value.to_s : nil
end

#find_attribute(attributes, name) ⇒ Object

Walks an attributes collection looking for an entry whose ‘.name` matches `name`. Returns the attribute, or nil.



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# File 'lib/lutaml/lml/executor/adapter_helpers.rb', line 33

def find_attribute(attributes, name)
  Array(attributes).find { |a| a.name == name }
end

#find_class_for_instance(first_instance, compiled) ⇒ Object

Returns [class_name, klass] for the first compiled class whose instances include ‘first_instance`, or nil if no match.



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# File 'lib/lutaml/lml/executor/adapter_helpers.rb', line 39

def find_class_for_instance(first_instance, compiled)
  compiled.find { |_name, klass| first_instance.is_a?(klass) }
end

#resolve_target_class(attributes, compiled) ⇒ Object

Returns the compiled class referenced by the ‘map_to` attribute, or nil if no such attribute or no such compiled class.



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# File 'lib/lutaml/lml/executor/adapter_helpers.rb', line 18

def resolve_target_class(attributes, compiled)
  attr = find_attribute(attributes, "map_to")
  return nil unless attr

  compiled[attr.value.to_s]
end