module RubyXL::OOXMLObjectClassMethods

def parse(node, known_namespaces = nil)
  case node
  when String, IO, Zip::InputStream then node = Nokogiri::XML.parse(node)
  end
  if node.is_a?(Nokogiri::XML::Document) then
    node = node.root
     ignorable_attr = node.attributes['Ignorable']
     @ignorables << ignorable_attr.value if ignorable_attr
  end
  obj = self.new
  obj.local_namespaces = node.namespace_definitions
  known_attributes = obtain_class_variable(:@@ooxml_attributes)
  content_params = known_attributes['_']
  process_attribute(obj, node.text, content_params) if content_params
  node.attributes.each_pair { |attr_name, attr|
    attr_name = if attr.namespace then "#{attr.namespace.prefix}:#{attr.name}"
                else attr.name
                end
    attr_params = known_attributes[attr_name]
    next if attr_params.nil?
    # raise "Unknown attribute [#{attr_name}] for element [#{node.name}]" if attr_params.nil?
    process_attribute(obj, attr.value, attr_params) unless attr_params[:computed]
  }
  known_child_nodes = obtain_class_variable(:@@ooxml_child_nodes)
  unless known_child_nodes.empty?
    known_namespaces ||= obtain_class_variable(:@@ooxml_namespaces)
    node.element_children.each { |child_node|
      ns = child_node.namespace
      prefix = if known_namespaces.has_key?(ns.href) then known_namespaces[ns.href]
               else ns.prefix
               end
      child_node_name = case prefix
                        when '', nil then child_node.name
                        else "#{prefix}:#{child_node.name}"
                        end
      child_node_params = known_child_nodes[child_node_name]
      raise "Unknown child node [#{child_node_name}] for element [#{node.name}]" if child_node_params.nil?
      parsed_object = child_node_params[:class].parse(child_node, known_namespaces)
      if child_node_params[:is_array] then
        index = parsed_object.index_in_collection
        collection = if (self < RubyXL::OOXMLContainerObject) then obj
                     else obj.send(child_node_params[:accessor])
                     end
        if index.nil? then
          collection << parsed_object
        else
          collection[index] = parsed_object
        end
      else
        obj.send("#{child_node_params[:accessor]}=", parsed_object)
      end
    }
  end
  obj
end