tdb-example.rb

require 'java'

Dir.glob("TDB-0.8.4/lib/*.jar") { |jar| require jar }

java_import "com.hp.hpl.jena.tdb.TDB"
java_import "com.hp.hpl.jena.tdb.TDBFactory"
java_import "com.hp.hpl.jena.util.FileManager"
java_import "com.hp.hpl.jena.query.QueryExecutionFactory"
java_import "com.hp.hpl.jena.query.ResultSetFormatter"

# Use union default graph
TDB.getContext.set(TDB.symUnionDefaultGraph, true)

dataset = TDBFactory.create_dataset("TDBstore")

data_location = "http://www.bbc.co.uk/programmes/b00876k2.rdf"

nm = dataset.get_named_model(data_location)
FileManager.get.read_model(nm, data_location)
puts "#{data_location} has #{nm.size} triples"

query = "
SELECT DISTINCT ?t
{
  ?s a ?t
}
"

qe = QueryExecutionFactory.create(query, dataset)
res = qe.exec_select
ResultSetFormatter.out(java.lang.System.out, res)