# frozen_string_literal: false

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require "forwardable"

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require "open-uri"

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require_relative "rss"

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require_relative "xml"

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module RSS

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class NotWellFormedError < Error

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attr_reader :line, :element

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# Create a new NotWellFormedError for an error at +line+

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# in +element+. If a block is given the return value of

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# the block ends up in the error message.

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def initialize(line=nil, element=nil)

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message = "This is not well formed XML"

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if element or line

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message << "\nerror occurred"

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message << " in #{element}" if element

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message << " at about #{line} line" if line

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end

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message << "\n#{yield}" if block_given?

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super(message)

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end

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end

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class XMLParserNotFound < Error

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def initialize

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super("available XML parser was not found in " <<

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"#{AVAILABLE_PARSER_LIBRARIES.inspect}.")

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end

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end

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class NotValidXMLParser < Error

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def initialize(parser)

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super("#{parser} is not an available XML parser. " <<

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"Available XML parser" <<

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(AVAILABLE_PARSERS.size > 1 ? "s are " : " is ") <<

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"#{AVAILABLE_PARSERS.inspect}.")

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end

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end

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class NSError < InvalidRSSError

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attr_reader :tag, :prefix, :uri

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def initialize(tag, prefix, require_uri)

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@tag, @prefix, @uri = tag, prefix, require_uri

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super("prefix <#{prefix}> doesn't associate uri " <<

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"<#{require_uri}> in tag <#{tag}>")

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end

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end

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class Parser

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extend Forwardable

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class << self

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@@default_parser = nil

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def default_parser

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@@default_parser || AVAILABLE_PARSERS.first

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end

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# Set @@default_parser to new_value if it is one of the

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# available parsers. Else raise NotValidXMLParser error.

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def default_parser=(new_value)

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if AVAILABLE_PARSERS.include?(new_value)

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@@default_parser = new_value

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else

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raise NotValidXMLParser.new(new_value)

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end

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end

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def parse(rss, *args)

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if args.last.is_a?(Hash)

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options = args.pop

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else

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options = {}

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end

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do_validate = boolean_argument(args[0], options[:validate], true)

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ignore_unknown_element =

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boolean_argument(args[1], options[:ignore_unknown_element], true)

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parser_class = args[2] || options[:parser_class] || default_parser

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parser = new(rss, parser_class)

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parser.do_validate = do_validate

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parser.ignore_unknown_element = ignore_unknown_element

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parser.parse

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end

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private

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def boolean_argument(positioned_value, option_value, default)

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value = positioned_value

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if value.nil? and not option_value.nil?

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value = option_value

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end

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value = default if value.nil?

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value

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end

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end

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def_delegators(:@parser, :parse, :rss,

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:ignore_unknown_element,

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:ignore_unknown_element=, :do_validate,

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:do_validate=)

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def initialize(rss, parser_class=self.class.default_parser)

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@parser = parser_class.new(normalize_rss(rss))

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end

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private

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# Try to get the XML associated with +rss+.

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# Return +rss+ if it already looks like XML, or treat it as a URI,

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# or a file to get the XML,

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def normalize_rss(rss)

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return rss if maybe_xml?(rss)

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uri = to_uri(rss)

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if uri.respond_to?(:read)

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uri.read

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elsif (RUBY_VERSION >= '2.7' || !rss.tainted?) and File.readable?(rss)

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File.open(rss) {|f| f.read}

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else

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rss

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end

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end

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# maybe_xml? tests if source is a string that looks like XML.

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def maybe_xml?(source)

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source.is_a?(String) and /</ =~ source

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end

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# Attempt to convert rss to a URI, but just return it if

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# there's a ::URI::Error

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def to_uri(rss)

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return rss if rss.is_a?(::URI::Generic)

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begin

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::URI.parse(rss)

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rescue ::URI::Error

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rss

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end

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end

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end

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class BaseParser

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class << self

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def raise_for_undefined_entity?

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listener.raise_for_undefined_entity?

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end

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end

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def initialize(rss)

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@listener = self.class.listener.new

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@rss = rss

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end

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def rss

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@listener.rss

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end

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def ignore_unknown_element

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@listener.ignore_unknown_element

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end

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def ignore_unknown_element=(new_value)

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@listener.ignore_unknown_element = new_value

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end

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def do_validate

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@listener.do_validate

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end

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def do_validate=(new_value)

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@listener.do_validate = new_value

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end

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def parse

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if @listener.rss.nil?

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_parse

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end

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@listener.rss

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end

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end

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class BaseListener

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extend Utils

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class << self

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@@accessor_bases = {}

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@@registered_uris = {}

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@@class_names = {}

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# return the setter for the uri, tag_name pair, or nil.

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def setter(uri, tag_name)

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_getter = getter(uri, tag_name)

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if _getter

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"#{_getter}="

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else

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nil

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end

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end

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def getter(uri, tag_name)

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(@@accessor_bases[uri] || {})[tag_name]

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end

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# return the tag_names for setters associated with uri

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def available_tags(uri)

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(@@accessor_bases[uri] || {}).keys

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end

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# register uri against this name.

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def register_uri(uri, name)

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@@registered_uris[name] ||= {}

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@@registered_uris[name][uri] = nil

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end

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# test if this uri is registered against this name

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def uri_registered?(uri, name)

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@@registered_uris[name].has_key?(uri)

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end

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# record class_name for the supplied uri and tag_name

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def install_class_name(uri, tag_name, class_name)

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@@class_names[uri] ||= {}

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@@class_names[uri][tag_name] = class_name

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end

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# retrieve class_name for the supplied uri and tag_name

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# If it doesn't exist, capitalize the tag_name

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def class_name(uri, tag_name)

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name = (@@class_names[uri] || {})[tag_name]

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return name if name

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tag_name = tag_name.gsub(/[_\-]([a-z]?)/) {$1.upcase}

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tag_name[0, 1].upcase + tag_name[1..-1]

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end

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def install_get_text_element(uri, name, accessor_base)

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install_accessor_base(uri, name, accessor_base)

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def_get_text_element(uri, name, *get_file_and_line_from_caller(1))

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end

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def raise_for_undefined_entity?

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true

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end

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private

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# set the accessor for the uri, tag_name pair

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def install_accessor_base(uri, tag_name, accessor_base)

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@@accessor_bases[uri] ||= {}

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@@accessor_bases[uri][tag_name] = accessor_base.chomp("=")

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end

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def def_get_text_element(uri, element_name, file, line)

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register_uri(uri, element_name)

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method_name = "start_#{element_name}"

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unless private_method_defined?(method_name)

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define_method(method_name) do |name, prefix, attrs, ns|

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uri = _ns(ns, prefix)

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if self.class.uri_registered?(uri, element_name)

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start_get_text_element(name, prefix, ns, uri)

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else

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start_else_element(name, prefix, attrs, ns)

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end

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end

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private(method_name)

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end

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end

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end

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end

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module ListenerMixin

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attr_reader :rss

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attr_accessor :ignore_unknown_element

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attr_accessor :do_validate

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def initialize

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@rss = nil

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@ignore_unknown_element = true

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@do_validate = true

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@ns_stack = [{"xml" => :xml}]

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@tag_stack = [[]]

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@text_stack = ['']

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@proc_stack = []

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@last_element = nil

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@version = @encoding = @standalone = nil

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@xml_stylesheets = []

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@xml_child_mode = false

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@xml_element = nil

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@last_xml_element = nil

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end

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# set instance vars for version, encoding, standalone

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def xmldecl(version, encoding, standalone)

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@version, @encoding, @standalone = version, encoding, standalone

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end

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def instruction(name, content)

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if name == "xml-stylesheet"

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params = parse_pi_content(content)

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if params.has_key?("href")

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@xml_stylesheets << XMLStyleSheet.new(params)

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end

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end

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end

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def tag_start(name, attributes)

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@text_stack.push('')

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ns = @ns_stack.last.dup

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attrs = {}

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attributes.each do |n, v|

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if /\Axmlns(?:\z|:)/ =~ n

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ns[$POSTMATCH] = v

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else

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attrs[n] = v

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end

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end

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@ns_stack.push(ns)

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prefix, local = split_name(name)

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@tag_stack.last.push([_ns(ns, prefix), local])

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@tag_stack.push([])

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if @xml_child_mode

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previous = @last_xml_element

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element_attrs = attributes.dup

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unless previous

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ns.each do |ns_prefix, value|

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next if ns_prefix == "xml"

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key = ns_prefix.empty? ? "xmlns" : "xmlns:#{ns_prefix}"

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element_attrs[key] ||= value

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end

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end

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next_element = XML::Element.new(local,

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prefix.empty? ? nil : prefix,

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_ns(ns, prefix),

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element_attrs)

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previous << next_element if previous

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@last_xml_element = next_element

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pr = Proc.new do |text, tags|

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if previous

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@last_xml_element = previous

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else

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@xml_element = @last_xml_element

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@last_xml_element = nil

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end

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end

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@proc_stack.push(pr)

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else

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if @rss.nil? and respond_to?("initial_start_#{local}", true)

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__send__("initial_start_#{local}", local, prefix, attrs, ns.dup)

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elsif respond_to?("start_#{local}", true)

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__send__("start_#{local}", local, prefix, attrs, ns.dup)

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else

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start_else_element(local, prefix, attrs, ns.dup)

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end

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end

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end

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def tag_end(name)

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if DEBUG

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p "end tag #{name}"

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p @tag_stack

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end

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text = @text_stack.pop

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tags = @tag_stack.pop

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pr = @proc_stack.pop

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pr.call(text, tags) unless pr.nil?

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@ns_stack.pop

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end

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def text(data)

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if @xml_child_mode

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@last_xml_element << data if @last_xml_element

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else

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@text_stack.last << data

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end

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end

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private

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def _ns(ns, prefix)

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ns.fetch(prefix, "")

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end

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CONTENT_PATTERN = /\s*([^=]+)=(["'])([^\2]+?)\2/

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# Extract the first name="value" pair from content.

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# Works with single quotes according to the constant

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# CONTENT_PATTERN. Return a Hash.

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def parse_pi_content(content)

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params = {}

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content.scan(CONTENT_PATTERN) do |name, quote, value|

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params[name] = value

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end

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params

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end

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def start_else_element(local, prefix, attrs, ns)

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class_name = self.class.class_name(_ns(ns, prefix), local)

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current_class = @last_element.class

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if known_class?(current_class, class_name)

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next_class = current_class.const_get(class_name)

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start_have_something_element(local, prefix, attrs, ns, next_class)

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else

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if !@do_validate or @ignore_unknown_element

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@proc_stack.push(setup_next_element_in_unknown_element)

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else

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parent = "ROOT ELEMENT???"

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if current_class.tag_name

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parent = current_class.tag_name

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end

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raise NotExpectedTagError.new(local, _ns(ns, prefix), parent)

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end

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end

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end

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if Module.method(:const_defined?).arity == -1

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def known_class?(target_class, class_name)

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class_name and

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(target_class.const_defined?(class_name, false) or

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target_class.constants.include?(class_name.to_sym))

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end

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else

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def known_class?(target_class, class_name)

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class_name and

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(target_class.const_defined?(class_name) or

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target_class.constants.include?(class_name))

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end

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end

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NAMESPLIT = /^(?:([\w:][-\w.]*):)?([\w:][-\w.]*)/

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def split_name(name)

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name =~ NAMESPLIT

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[$1 || '', $2]

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end

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def check_ns(tag_name, prefix, ns, require_uri, ignore_unknown_element=nil)

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if _ns(ns, prefix) == require_uri

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true

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else

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if ignore_unknown_element.nil?

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ignore_unknown_element = @ignore_unknown_element

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end

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if ignore_unknown_element

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false

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elsif @do_validate

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raise NSError.new(tag_name, prefix, require_uri)

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else

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# Force bind required URI with prefix

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@ns_stack.last[prefix] = require_uri

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true

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end

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end

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end

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def start_get_text_element(tag_name, prefix, ns, required_uri)

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pr = Proc.new do |text, tags|

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setter = self.class.setter(required_uri, tag_name)

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if setter and @last_element.respond_to?(setter)

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if @do_validate

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getter = self.class.getter(required_uri, tag_name)

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if @last_element.__send__(getter)

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raise TooMuchTagError.new(tag_name, @last_element.tag_name)

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end

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end

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@last_element.__send__(setter, text.to_s)

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else

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if @do_validate and !@ignore_unknown_element

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raise NotExpectedTagError.new(tag_name, _ns(ns, prefix),

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@last_element.tag_name)

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end

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end

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end

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@proc_stack.push(pr)

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end

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def start_have_something_element(tag_name, prefix, attrs, ns, klass)

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if check_ns(tag_name, prefix, ns, klass.required_uri)

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attributes = collect_attributes(tag_name, prefix, attrs, ns, klass)

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@proc_stack.push(setup_next_element(tag_name, klass, attributes))

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else

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@proc_stack.push(setup_next_element_in_unknown_element)

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end

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end

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[493] Fix | Delete

def collect_attributes(tag_name, prefix, attrs, ns, klass)

[494] Fix | Delete

attributes = {}

[495] Fix | Delete

klass.get_attributes.each do |a_name, a_uri, required, element_name|

[496] Fix | Delete

if a_uri.is_a?(String) or !a_uri.respond_to?(:include?)

[497] Fix | Delete

a_uri = [a_uri]

[498] Fix | Delete

end

[499] Fix | Delete