Class: Pacer::GraphML

Inherits:
Object
  • Object
show all
Defined in:
lib/pacer/graph/graph_ml.rb

Overview

Methods to be mixed into Blueprints Graph objects from any implementation.

Adds more convenient/rubyish methods and adds support for extensions to some methods where needed.

Class Method Summary collapse

Class Method Details

.export(graph, path) ⇒ Object

Export the graph to GraphML



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# File 'lib/pacer/graph/graph_ml.rb', line 33

def self.export(graph, path)
  path = File.expand_path path
  stream = java.io.FileOutputStream.new path
  com.tinkerpop.blueprints.util.io.graphml.GraphMLWriter.outputGraph graph.blueprints_graph, stream
ensure
  stream.close if stream
end

.import(graph, path) ⇒ Object

Import the data in a GraphML file.

Will fail if the data already exsts in the current graph.



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# File 'lib/pacer/graph/graph_ml.rb', line 13

def self.import(graph, path)
  path = File.expand_path path
  begin
    stream = java.net.URL.new(path).open_stream
  rescue java.net.MalformedURLException
    stream = java.io.FileInputStream.new path
  end
  graph.transaction(nesting: true) do
    graph.send :creating_elements do
      com.tinkerpop.blueprints.util.io.graphml.GraphMLReader.input_graph graph.blueprints_graph, stream
    end
  end
  true
ensure
  stream.close if stream
end