Class: REXML::Parsers::TreeParser

Inherits:
Object
  • Object
show all
Defined in:
lib/extensions/rexml/rexml/parsers/treeparser.rb,
lib/extensions/rhoxml/rexml/parsers/treeparser.rb

Instance Method Summary collapse

Constructor Details

#initialize(source, build_context = Document.new) ⇒ TreeParser

Returns a new instance of TreeParser.



7
8
9
10
 
# File 'lib/extensions/rexml/rexml/parsers/treeparser.rb', line 7

def initialize( source, build_context = Document.new )
  @build_context = build_context
  @parser = Parsers::BaseParser.new( source )
end

Instance Method Details

#add_listener(listener) ⇒ Object 



12
13
14
 
# File 'lib/extensions/rexml/rexml/parsers/treeparser.rb', line 12

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

#parse ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
 
# File 'lib/extensions/rexml/rexml/parsers/treeparser.rb', line 16

def parse
  tag_stack = []
  in_doctype = false
  entities = nil
  begin
    while true
      event = @parser.pull
      #STDERR.puts "TREEPARSER GOT #{event.inspect}"
      case event[0]
      when :end_document
        unless tag_stack.empty?
          #raise ParseException.new("No close tag for #{tag_stack.inspect}")
          raise ParseException.new("No close tag for #{@build_context.xpath}")
        end
        return
      when :start_element
        tag_stack.push(event[1])
        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
        tag_stack.pop
        @build_context = @build_context.parent
      when :text
        if not in_doctype
          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
        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
        in_doctype = false
        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 = {}
        in_doctype = true
      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::UndefinedNamespaceException
    raise
  rescue
    raise ParseException.new( $!.message, @parser.source, @parser, $! )
  end
end