Module: Clusta::Transforms

Defined in:
lib/clusta/transforms.rb,
lib/clusta/transforms/pm3d.rb,
lib/clusta/transforms/import.rb,
lib/clusta/transforms/prune_edges.rb,
lib/clusta/transforms/edges_to_degrees.rb,
lib/clusta/transforms/edges_to_neighborhoods.rb,
lib/clusta/transforms/neighborhoods_to_degree_pairs.rb,
lib/clusta/transforms/degree_pairs_to_assortativities.rb

Defined Under Namespace

Modules: DegreePairsToAssortativities, EdgesToDegrees, EdgesToNeighborhoods, Import, NeighborhoodsToDegreePairs, Pm3d, PruneEdges

Class Method Summary collapse

Class Method Details

.default_script ⇒ Object 



29
30
31
32
33
34
35
36
37
 
# File 'lib/clusta/transforms.rb', line 29

def self.default_script
  Class.new(Wukong::Script).tap do |c|
    c.class_eval do
      def local_mode_sort_commandline
        "sort -n -k2"
      end
    end
  end
end

.from_name(name) ⇒ Object 



13
14
15
16
17
18
19
 
# File 'lib/clusta/transforms.rb', line 13

def self.from_name name
  begin
    const_get(Clusta.classify(name))
  rescue NameError => e
    raise Error.new("No such transform: '#{name}'")
  end
end

.has_mapper?(transform) ⇒ Boolean

Returns:

  • (Boolean) 


39
40
41
 
# File 'lib/clusta/transforms.rb', line 39

def self.has_mapper?(transform)
  defined?(transform::Mapper)
end

.has_reducer?(transform) ⇒ Boolean

Returns:

  • (Boolean) 


43
44
45
 
# File 'lib/clusta/transforms.rb', line 43

def self.has_reducer?(transform)
  defined?(transform::Reducer)
end

.listing ⇒ Object 



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/clusta/transforms.rb', line 53

def self.listing
  [].tap do |out|
    out << "Known transforms:"
    out << ''
    names.sort.each do |transform_name|
      transform = from_name(transform_name)
      name_suffix = case
                    when has_mapper?(transform)     && has_reducer?(transform)     then ''
                    when (! has_mapper?(transform)) && has_reducer?(transform)     then ' (reduce-only)'
                    when has_mapper?(transform)     && (! has_reducer?(transform)) then ' (map-only)'
                    when (! has_mapper?(transform)) && (! has_reducer?(transform)) then ' (nothing)'
                    end
      
      out << "  #{transform_name}#{name_suffix}"
      if transform.respond_to?(:help)
        out << ''
        out << "    #{transform.help}"
      end
      out <<  ''
    end
  end.join("\n")
end

.load_from(path) ⇒ Object 



76
77
78
79
 
# File 'lib/clusta/transforms.rb', line 76

def self.load_from path
  class_eval(File.read(path), path)
  register_transform(Clusta.require_name(path))
end

.names ⇒ Object 



5
6
7
 
# File 'lib/clusta/transforms.rb', line 5

def self.names
  @names ||= []
end

.register_transform(name) ⇒ Object 



9
10
11
 
# File 'lib/clusta/transforms.rb', line 9

def self.register_transform name
  names << name
end

.script_for(transform) ⇒ Object 



21
22
23
24
25
26
27
 
# File 'lib/clusta/transforms.rb', line 21

def self.script_for transform
  mapper  = transform::Mapper  if defined?(transform::Mapper)
  reducer = transform::Reducer if defined?(transform::Reducer)
  options = (transform.respond_to?(:options) ? transform.options : {})
  script  = defined?(transform::Script) ? transform::Script : default_script
  script.new(mapper, reducer, options)
end