Class: Moxml::C14n::DataModel

Inherits:
Object
  • Object
show all
Defined in:
lib/moxml/c14n/data_model.rb

Overview

Builds a C14N data model from a Moxml::Node tree (or XML string).

The data model exists because canonicalization needs:

- sorted namespace and attribute axes (spec §2.3, §2.4)
- in_node_set flags for subset canonicalization (spec §3)
- xml:* inheritable attribute resolution

Ported from canon (lutaml/canon) — adapted to build directly from Moxml::Node rather than via a separate Nokogiri pass. Matches canon's document-level node iteration (PIs and comments outside the document root element).

Constant Summary collapse

BUILDABLE_TYPES = 
[::Moxml::Element, ::Moxml::Text, ::Moxml::Cdata,
::Moxml::Comment,
::Moxml::ProcessingInstruction].freeze

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.source_map ⇒ Object (readonly)

Returns the value of attribute source_map.



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# File 'lib/moxml/c14n/data_model.rb', line 38

def source_map
  @source_map
end

Class Method Details

.buildable?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/c14n/data_model.rb', line 45

def self.buildable?(node)
  BUILDABLE_TYPES.any? { |type| node.is_a?(type) }
end

.from_node(moxml_node) ⇒ Object 



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# File 'lib/moxml/c14n/data_model.rb', line 21

def self.from_node(moxml_node)
  @source_map = {}
  return build_from_document(moxml_node) if moxml_node.is_a?(::Moxml::Document)

  root = Nodes::RootNode.new
  built = build_node(moxml_node, [0])
  root.add_child(built) if built
  root
end

.from_xml(xml_string) ⇒ Object 



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# File 'lib/moxml/c14n/data_model.rb', line 17

def self.from_xml(xml_string)
  from_node(::Moxml.parse(xml_string))
end

.mark_subset_paths(root_node, paths) ⇒ Object

Mark an XPath-selected subset: reset the whole model, then flag each matched node by position path. Node-set semantics follow the enveloped-signature interop (libxml2/xmlsec): an included element renders with its namespaces, attributes and DIRECT character data, but child ELEMENTS render only if matched too — an unmatched Signature subtree stays out even though its ancestors are matched. Comments and PIs render only when the expression itself selects them (spec §3: the node-set is literal).



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# File 'lib/moxml/c14n/data_model.rb', line 243

def self.mark_subset_paths(root_node, paths)
  mark_all(root_node, false)
  paths.each do |path|
    node = lookup_path(root_node, path)
    next unless node

    if node.is_a?(Nodes::ElementNode)
      node.in_node_set = true
      node.namespace_nodes.each { |ns| ns.in_node_set = true }
      node.attribute_nodes.each { |attr| attr.in_node_set = true }
      node.children.each do |child|
        child.in_node_set = true if child.is_a?(Nodes::TextNode)
      end
    else
      node.in_node_set = true
    end
  end
end

.node_path(node, source) ⇒ Object 



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# File 'lib/moxml/c14n/data_model.rb', line 79

def self.node_path(node, source)
  parts = []
  cur = node
  loop do
    if !source.is_a?(::Moxml::Document) && cur.equal?(source)
      parts.unshift(0)
      return parts
    end

    parent = cur.parent
    return nil unless parent

    idx = parent.children.select { |c| buildable?(c) }.index { |c| c == cur }
    return nil unless idx

    parts.unshift(idx)
    return parts if source.is_a?(::Moxml::Document) && parent.is_a?(::Moxml::Document)

    cur = parent
  end
end

.path_key_for(wrapper, source, adapter) ⇒ Object

Path key of a matched wrapper relative to the source the data model was built from; nil when the wrapper is outside it. Attributes extend their owner's path with [:attribute, index]. The adapter comes from the caller: the Attribute contract keeps its own adapter hop protected.



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# File 'lib/moxml/c14n/data_model.rb', line 54

def self.path_key_for(wrapper, source, adapter)
  case wrapper
  when ::Moxml::Attribute
    owner = wrapper.parent
    unless owner.is_a?(::Moxml::Element)
      # XPath results are re-wrapped from natives: attribute
      # wrappers carry no minted parent. The adapter answers
      # the owner element instead.
      owner_native = adapter.attribute_element(wrapper.native)
      owner = owner_native && ::Moxml::Node.wrap(owner_native, wrapper.context)
    end
    return nil unless owner.is_a?(::Moxml::Element)

    owner_path = node_path(owner, source)
    return nil unless owner_path

    idx = owner.attributes.index { |a| a == wrapper }
    return nil unless idx

    owner_path + [:attribute, idx]
  when *BUILDABLE_TYPES
    node_path(wrapper, source)
  end
end