Class: GraphViz::GraphML

Inherits:
Object
  • Object
show all
Defined in:
lib/graphviz/graphml.rb

Constant Summary collapse

DEST = 
{
  'node'  => [:nodes],
  'edge'  => [:edges],
  'graph' => [:graphs],
  'all'   => [:nodes, :edges, :graphs]
}
GTYPE = 
{
  'directed' => :digraph,
  'undirected' => :graph
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file_or_str) ⇒ GraphML

Create a new GraphViz object from a GraphML file of string



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# File 'lib/graphviz/graphml.rb', line 43

def initialize( file_or_str )
  data = ((File.file?( file_or_str )) ? File::new(file_or_str) : file_or_str) 
  @xmlDoc = REXML::Document::new( data )
  @attributs = {
    :nodes => {},
    :edges => {},
    :graphs => {}
  }
  @graph = nil
  @current_attr = nil
  @current_node = nil
  @current_edge = nil
  @current_graph = nil
  
  parse( @xmlDoc.root )
end

Instance Attribute Details

#attributs ⇒ Object (readonly)

Returns the value of attribute attributs.



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# File 'lib/graphviz/graphml.rb', line 23

def attributs
  @attributs
end

#graph ⇒ Object

The GraphViz object



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# File 'lib/graphviz/graphml.rb', line 26

def graph
  @graph
end

Instance Method Details

#graphml(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 68

def graphml( node ) #:nodoc:
  node.each_element( ) do |child|
    #begin
      send( "graphml_#{child.name}".to_sym, child )
    #rescue NoMethodError => e
    #  raise "ERROR node #{child.name} can be child of graphml"
    #end
  end
end

#graphml_graph(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 103

def graphml_graph( node ) #:nodoc:
  @current_node = nil
  
  if @current_graph.nil?
    @graph = GraphViz.new( node.attributes['id'], :type => GTYPE[node.attributes['edgedefault']] )
    @current_graph = @graph
    previous_graph = @graph
  else
    previous_graph = @current_graph      
    @current_graph = previous_graph.add_graph( node.attributes['id'] )
  end
  
  @attributs[:graphs].each do |id, data|
    @current_graph.graph[data[:name]] = data[:default] if data.has_key?(:default)
  end
  @attributs[:nodes].each do |id, data|
    @current_graph.node[data[:name]] = data[:default] if data.has_key?(:default)
  end
  @attributs[:edges].each do |id, data|
    @current_graph.edge[data[:name]] = data[:default] if data.has_key?(:default)
  end
      
  node.each_element( ) do |child|
    #begin
      send( "graphml_graph_#{child.name}".to_sym, child )
    #rescue NoMethodError => e
    #  raise "ERROR node #{child.name} can be child of graphml"
    #end
  end
  
  @current_graph = previous_graph
end

#graphml_graph_data(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 136

def graphml_graph_data( node ) #:nodoc:
  @current_graph[@attributs[:graphs][node.attributes['key']][:name]] = node.texts().to_s
end

#graphml_graph_edge(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 181

def graphml_graph_edge( node ) #:nodoc:
  source = node.attributes['source']
  source = {source => node.attributes['sourceport']} if node.attributes['sourceport']
  target = node.attributes['target']
  target = {target => node.attributes['targetport']} if node.attributes['targetport']
  
  @current_edge = @current_graph.add_edge( source, target )
  
  node.each_element( ) do |child|
    #begin
      send( "graphml_graph_edge_#{child.name}".to_sym, child )
    #rescue NoMethodError => e
    #  raise "ERROR node #{child.name} can be child of graphml"
    #end
  end
  
  @current_edge = nil
end

#graphml_graph_edge_data(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 200

def graphml_graph_edge_data( node ) #:nodoc:
  @current_edge[@attributs[:edges][node.attributes['key']][:name]] = node.texts().to_s
end

#graphml_graph_hyperedge(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 204

def graphml_graph_hyperedge( node ) #:nodoc:
  list = []
  
  node.each_element( ) do |child|
    if child.name == "endpoint"
      if child.attributes['port']
        list << { child.attributes['node'] => child.attributes['port'] }
      else
        list << child.attributes['node']
      end
    end
  end
  
  list.each { |s|
    list.each { |t|
      @current_graph.add_edge( s, t ) unless s == t
    }
  } 
end

#graphml_graph_node(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 140

def graphml_graph_node( node ) #:nodoc:
  @current_node = {}
  
  node.each_element( ) do |child|
    case child.name
    when "graph"
      graphml_graph( child )
    else
      begin
        send( "graphml_graph_node_#{child.name}".to_sym, child )
      rescue NoMethodError => e
        raise "ERROR node #{child.name} can be child of graphml"
      end
    end
  end
  
  unless @current_node.nil?
    node = @current_graph.add_node( node.attributes['id'] )
    @current_node.each do |k, v|
      node[k] = v
    end
  end
  
  @current_node = nil
end

#graphml_graph_node_data(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 166

def graphml_graph_node_data( node ) #:nodoc:
  @current_node[@attributs[:nodes][node.attributes['key']][:name]] = node.texts().to_s
end

#graphml_graph_node_port(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 170

def graphml_graph_node_port( node ) #:nodoc:
  @current_node[:shape] = :record
  port = node.attributes['name']
  if @current_node[:label]
    label = @current_node[:label].gsub( "{", "" ).gsub( "}", "" )
    @current_node[:label] = "#{label}|<#{port}> #{port}"
  else
    @current_node[:label] = "<#{port}> #{port}"
  end
end

#graphml_key(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 78

def graphml_key( node ) #:nodoc:
  id = node.attributes['id']
  @current_attr = {
    :name => node.attributes['attr.name'],
    :type => node.attributes['attr.type']
  }    
  DEST[node.attributes['for']].each do |d|
    @attributs[d][id] = @current_attr
  end
  
  node.each_element( ) do |child|
    begin
      send( "graphml_key_#{child.name}".to_sym, child )
    rescue NoMethodError => e
      raise "ERROR node #{child.name} can be child of graphml"
    end
  end
  
  @current_attr = nil
end

#graphml_key_default(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 99

def graphml_key_default( node ) #:nodoc:
  @current_attr[:default] = node.texts().to_s
end

#parse(node) ⇒ Object

:nodoc:



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# File 'lib/graphviz/graphml.rb', line 60

def parse( node ) #:nodoc:
  #begin
    send( node.name.to_sym, node )
  #rescue NoMethodError => e
  #  raise "ERROR node #{node.name} can be root"
  #end
end