parse

# File lib/rexml/parsers/sax2parser.rb, line 85
      def parse
        @procs.each { |sym,match,block| block.call if sym == :start_document }
        @listeners.each { |sym,match,block|
          block.start_document if sym == :start_document or sym.nil?
        }
        root = context = []
        while true
          event = @parser.pull
          case event[0]
          when :end_document
            handle( :end_document )
            break
          when :start_doctype
            handle( :doctype, *event[1..-1])
          when :end_doctype
            context = context[1]
          when :start_element
            @tag_stack.push(event[1])
            # find the observers for namespaces
            procs = get_procs( :start_prefix_mapping, event[1] )
            listeners = get_listeners( :start_prefix_mapping, event[1] )
            if procs or listeners
              # break out the namespace declarations
              # The attributes live in event[2]
              event[2].each {|n, v| event[2][n] = @parser.normalize(v)}
              nsdecl = event[2].find_all { |n, value| n =~ /^xmlns(:|$)/ }
              nsdecl.collect! { |n, value| [ n[6..-1], value ] }
              @namespace_stack.push({})
              nsdecl.each do |n,v|
                @namespace_stack[-1][n] = v
                # notify observers of namespaces
                procs.each { |ob| ob.call( n, v ) } if procs
                listeners.each { |ob| ob.start_prefix_mapping(n, v) } if listeners
              end
            end
            event[1] =~ Namespace::NAMESPLIT
            prefix = $1
            local = $2
            uri = get_namespace(prefix)
            # find the observers for start_element
            procs = get_procs( :start_element, event[1] )
            listeners = get_listeners( :start_element, event[1] )
            # notify observers
            procs.each { |ob| ob.call( uri, local, event[1], event[2] ) } if procs
            listeners.each { |ob|
              ob.start_element( uri, local, event[1], event[2] )
            } if listeners
          when :end_element
            @tag_stack.pop
            event[1] =~ Namespace::NAMESPLIT
            prefix = $1
            local = $2
            uri = get_namespace(prefix)
            # find the observers for start_element
            procs = get_procs( :end_element, event[1] )
            listeners = get_listeners( :end_element, event[1] )
            # notify observers
            procs.each { |ob| ob.call( uri, local, event[1] ) } if procs
            listeners.each { |ob|
              ob.end_element( uri, local, event[1] )
            } if listeners

            namespace_mapping = @namespace_stack.pop
            # find the observers for namespaces
            procs = get_procs( :end_prefix_mapping, event[1] )
            listeners = get_listeners( :end_prefix_mapping, event[1] )
            if procs or listeners
              namespace_mapping.each do |ns_prefix, ns_uri|
                # notify observers of namespaces
                procs.each { |ob| ob.call( ns_prefix ) } if procs
                listeners.each { |ob| ob.end_prefix_mapping(ns_prefix) } if listeners
              end
            end
          when :text
            #normalized = @parser.normalize( event[1] )
            #handle( :characters, normalized )
            copy = event[1].clone

            esub = proc { |match|
              if @entities.has_key?($1)
                @entities[$1].gsub(Text::REFERENCE, &esub)
              else
                match
              end
            }

            copy.gsub!( Text::REFERENCE, &esub )
            copy.gsub!( Text::NUMERICENTITY ) {|m|
              m=$1
              m = "0#{m}" if m[0] == xx
              [Integer(m)].pack('U*')
            }
            handle( :characters, copy )
          when :entitydecl
            @entities[ event[1] ] = event[2] if event.size == 3
            handle( *event )
          when :processing_instruction, :comment, :attlistdecl,
            :elementdecl, :cdata, :notationdecl, :xmldecl
            handle( *event )
          end
          handle( :progress, @parser.position )
        end
      end