Module: Axn::Core::AmbientContext::ClassMethods

Defined in:
lib/axn/core/ambient_context.rb

Instance Method Summary collapse

Instance Method Details

#_ambient_subfield_tree ⇒ Object

The declared ambient sub-tree, used by _filter_to_declared to rebuild the filtered hash along each declared path. Ambient subfields are deliberately ABSENT from the shared _resolved_subfields tree — ambient is excluded from the input schema, and the executor / contradiction / facade consumers rely on that absence — so this builds a SEPARATE tree from the SAME SubfieldTree.build machinery (no re-derivation of path/alias resolution), scoped to a synthetic :ambient_context root plus the ambient-rooted subfield configs. Cached by subfield_configs identity: the store is copy-on-write via += (same discipline as _resolved_subfields), so any declaration rebuilds and an undeclaring subclass reuses the superclass's tree.



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# File 'lib/axn/core/ambient_context.rb', line 36

def _ambient_subfield_tree
  subfields = subfield_configs
  cached = @_axn_ambient_subfield_tree
  return cached.value if cached && cached.subfields.equal?(subfields)

  ambient = subfields.select { |c| _on_roots_at_ambient?(c.on) }
  value = Axn::Internal::SubfieldTree.build([_synthetic_ambient_root], ambient)
  @_axn_ambient_subfield_tree = AmbientSubfieldTreeCacheEntry.new(subfields:, value:)
  value
end