Class: REXML::Parsers::StreamParser

Inherits:
Object
  • Object
show all
Defined in:
lib/rexml/parsers/streamparser.rb

Instance Method Summary collapse

Constructor Details

#initialize(source, listener) ⇒ StreamParser

Returns a new instance of StreamParser.



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# File 'lib/rexml/parsers/streamparser.rb', line 7

def initialize source, listener
  @listener = listener
  @parser = BaseParser.new( source )
  @tag_stack = []
end

Instance Method Details

#add_listener(listener) ⇒ Object 



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# File 'lib/rexml/parsers/streamparser.rb', line 13

def add_listener( listener )
  @parser.add_listener( listener )
end

#parse ⇒ Object 



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# File 'lib/rexml/parsers/streamparser.rb', line 17

def parse
  # entity string
  while true
    event = @parser.pull
    case event[0]
    when :end_document
      unless @tag_stack.empty?
        tag_path = "/" + @tag_stack.join("/")
        raise ParseException.new("Missing end tag for '#{tag_path}'",
                                 @parser.source)
      end
      return
    when :start_element
      @tag_stack << event[1]
      attrs = event[2].each do |n, v|
        event[2][n] = @parser.unnormalize( v )
      end
      @listener.tag_start( event[1], attrs )
    when :end_element
      @listener.tag_end( event[1] )
      @tag_stack.pop
    when :text
      normalized = @parser.unnormalize( event[1] )
      @listener.text( normalized )
    when :processing_instruction
      @listener.instruction( *event[1,2] )
    when :start_doctype
      @listener.doctype( *event[1..-1] )
    when :end_doctype
      # FIXME: remove this condition for milestone:3.2
      @listener.doctype_end if @listener.respond_to? :doctype_end
    when :comment, :attlistdecl, :cdata, :xmldecl, :elementdecl
      @listener.send( event[0].to_s, *event[1..-1] )
    when :entitydecl, :notationdecl
      @listener.send( event[0].to_s, event[1..-1] )
    when :externalentity
      entity_reference = event[1]
      content = entity_reference.gsub(/\A%|;\z/, "")
      @listener.entity(content)
    end
  end
end