diff options
Diffstat (limited to 'activesupport/lib/active_support/xml_mini/nokogirisax.rb')
-rw-r--r-- | activesupport/lib/active_support/xml_mini/nokogirisax.rb | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/xml_mini/nokogirisax.rb b/activesupport/lib/active_support/xml_mini/nokogirisax.rb new file mode 100644 index 0000000000..42a44897ba --- /dev/null +++ b/activesupport/lib/active_support/xml_mini/nokogirisax.rb @@ -0,0 +1,82 @@ +require 'nokogiri' + +# = XmlMini Nokogiri implementation using a SAX-based parser +module ActiveSupport + module XmlMini_NokogiriSAX + extend self + + # Class that will build the hash while the XML document + # is being parsed using SAX events. + class HashBuilder < Nokogiri::XML::SAX::Document + + CONTENT_KEY = '__content__'.freeze + HASH_SIZE_KEY = '__hash_size__'.freeze + + attr_reader :hash + + def current_hash + @hash_stack.last + end + + def start_document + @hash = {} + @hash_stack = [@hash] + end + + def end_document + raise "Parse stack not empty!" if @hash_stack.size > 1 + end + + def error(error_message) + raise Nokogiri::XML::SyntaxError, error_message + end + + def start_element(name, attrs = []) + new_hash = { CONTENT_KEY => '' } + new_hash[attrs.shift] = attrs.shift while attrs.length > 0 + new_hash[HASH_SIZE_KEY] = new_hash.size + 1 + + case current_hash[name] + when Array then current_hash[name] << new_hash + when Hash then current_hash[name] = [current_hash[name], new_hash] + when nil then current_hash[name] = new_hash + end + + @hash_stack.push(new_hash) + end + + def end_element(name) + if current_hash.length > current_hash.delete(HASH_SIZE_KEY) && current_hash[CONTENT_KEY].blank? || current_hash[CONTENT_KEY] == '' + current_hash.delete(CONTENT_KEY) + end + @hash_stack.pop + end + + def characters(string) + current_hash[CONTENT_KEY] << string + end + + alias_method :cdata_block, :characters + end + + attr_accessor :document_class + self.document_class = HashBuilder + + def parse(data) + if !data.respond_to?(:read) + data = StringIO.new(data || '') + end + + char = data.getc + if char.nil? + {} + else + data.ungetc(char) + document = self.document_class.new + parser = Nokogiri::XML::SAX::Parser.new(document) + parser.parse(data) + document.hash + end + end + end +end
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