Class: RoadForest::RDF::FocusList

Inherits:
RDF::List
  • Object
show all
Defined in:
lib/roadforest/rdf/focus-list.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#base_node ⇒ Object

Returns the value of attribute base_node.



9
10
11
 
# File 'lib/roadforest/rdf/focus-list.rb', line 9

def base_node
  @base_node
end

#root_url ⇒ Object

Returns the value of attribute root_url.



9
10
11
 
# File 'lib/roadforest/rdf/focus-list.rb', line 9

def root_url
  @root_url
end

Instance Method Details

#append(value) ⇒ Object Also known as: << 



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/roadforest/rdf/focus-list.rb', line 30

def append(value)
  value = case value
    when nil         then RDF.nil
    when RDF::Value  then value
    when Array       then RDF::List.new(nil, graph, value)
    else value
  end

  if empty?
    new_subject = subject
    #graph.insert([new_subject, RDF.type, RDF.List])
  else
    old_subject, new_subject = last_subject, RDF::Node.new
    graph.delete([old_subject, RDF.rest, RDF.nil])
    graph.insert([old_subject, RDF.rest, new_subject])
  end

  graph.insert([new_subject, RDF.first, value.is_a?(RDF::List) ? value.subject : value])
  graph.insert([new_subject, RDF.rest, RDF.nil])

  self
end

#append_node(subject = nil) ⇒ Object 



54
55
56
57
58
59
 
# File 'lib/roadforest/rdf/focus-list.rb', line 54

def append_node(subject=nil)
  base_node.create_node(subject) do |node|
    append(node.subject)
    yield node if block_given?
  end
end

#car ⇒ Object 



16
 
# File 'lib/roadforest/rdf/focus-list.rb', line 16

alias car first

#each ⇒ Object 



23
24
25
26
27
28
 
# File 'lib/roadforest/rdf/focus-list.rb', line 23

def each
  return to_enum unless block_given?
  super do |value|
    yield base_node.unwrap_value(value)
  end
end

#first ⇒ Object 



19
20
21
 
# File 'lib/roadforest/rdf/focus-list.rb', line 19

def first
  at(0)
end

#source_rigor ⇒ Object

XXX Can delete?



12
13
14
 
# File 'lib/roadforest/rdf/focus-list.rb', line 12

def source_rigor
  graph.rigor
end