class REXML::Parsers::TreeParser - rexml: Ruby Standard Library Documentation

# class REXML::Parsers::TreeParser

### Public Class Methods

new( source, build_context = Document.new ) click to toggle source

    # File rexml-3.4.0/lib/rexml/parsers/treeparser.rb, line 8
    def initialize( source, build_context = Document.new )
      @build_context = build_context
      @parser = Parsers::BaseParser.new( source )
    end

### Public Instance Methods

add_listener( listener ) click to toggle source

    # File rexml-3.4.0/lib/rexml/parsers/treeparser.rb, line 13
    def add_listener( listener )
      @parser.add_listener( listener )
    end

parse() click to toggle source

    # File rexml-3.4.0/lib/rexml/parsers/treeparser.rb, line 17
    def parse
      entities = nil
      begin
        while true
          event = @parser.pull
          #STDERR.puts "TREEPARSER GOT #{event.inspect}"
          case event[0]
          when :end_document
            return
          when :start_element
            el = @build_context = @build_context.add_element( event[1] )
            event[2].each do |key, value|
              el.attributes[key]=Attribute.new(key,value,self)
            end
          when :end_element
            @build_context = @build_context.parent
          when :text
            if @build_context[-1].instance_of? Text
              @build_context[-1] << event[1]
            else
              @build_context.add(
                Text.new(event[1], @build_context.whitespace, nil, true)
              ) unless (
                @build_context.ignore_whitespace_nodes and
                event[1].strip.size==0
              )
            end
          when :comment
            c = Comment.new( event[1] )
            @build_context.add( c )
          when :cdata
            c = CData.new( event[1] )
            @build_context.add( c )
          when :processing_instruction
            @build_context.add( Instruction.new( event[1], event[2] ) )
          when :end_doctype
            entities.each { |k,v| entities[k] = @build_context.entities[k].value }
            @build_context = @build_context.parent
          when :start_doctype
            doctype = DocType.new( event[1..-1], @build_context )
            @build_context = doctype
            entities = {}
          when :attlistdecl
            n = AttlistDecl.new( event[1..-1] )
            @build_context.add( n )
          when :externalentity
            n = ExternalEntity.new( event[1] )
            @build_context.add( n )
          when :elementdecl
            n = ElementDecl.new( event[1] )
            @build_context.add(n)
          when :entitydecl
            entities[ event[1] ] = event[2] unless event[2] =~ /PUBLIC|SYSTEM/
            @build_context.add(Entity.new(event))
          when :notationdecl
            n = NotationDecl.new( *event[1..-1] )
            @build_context.add( n )
          when :xmldecl
            x = XMLDecl.new( event[1], event[2], event[3] )
            @build_context.add( x )
          end
        end
      rescue REXML::Validation::ValidationException
        raise
      rescue REXML::ParseException
        raise
      rescue
        raise ParseException.new( $!.message, @parser.source, @parser, $! )
      end
    end