Package com.hp.hpl.jena.query

Examples of com.hp.hpl.jena.query.Dataset

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        // read some (more) data into a dataset graph.
        RiotLoader.read("data2.trig", dsg) ;
       
        // Create a daatset,
        Dataset ds = DatasetFactory.create() ;
        // read in data.
        RiotLoader.read("data2.trig", ds.asDatasetGraph()) ;

    }
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        SDBConnection conn = new SDBConnection(jdbcConnection) ;
       
        Store store = StoreFactory.create(storeDesc, conn) ;
       
        Dataset ds = DatasetStore.create(store) ;
        QueryExecution qe = QueryExecutionFactory.create(query, ds) ;
        try {
            ResultSet rs = qe.execSelect() ;
            ResultSetFormatter.out(rs) ;
        } finally { qe.close() ; }
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{
    public static void main(String... argv)
    {
        // Direct way: Make a TDB-back Jena model in the named directory.
        String directory = "MyDatabases/DB1" ;
        Dataset ds = TDBFactory.createDataset(directory) ;
        Model model = ds.getDefaultModel() ;
       
        // ... do work ...
       
        // Close the dataset.
        ds.close();
       
    }
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    public static void main(String ... args)
    {
        // This also works for default union graph ....
        TDB.getContext().setTrue(TDB.symUnionDefaultGraph) ;
       
        Dataset ds = setup() ;
        Filter<Tuple<NodeId>> filter = createFilter(ds) ;
        example(ds, filter) ;
    }
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    }
   
    /** Example setup - in-memory dataset with two graphs, one triple in each */
    private static Dataset setup()
    {
        Dataset ds = TDBFactory.createDataset() ;
        DatasetGraphTDB dsg = (DatasetGraphTDB)(ds.asDatasetGraph()) ;
        Quad q1 = SSE.parseQuad("(<http://example/g1> <http://example/s> <http://example/p> <http://example/o1>)") ;
        Quad q2 = SSE.parseQuad("(<http://example/g2> <http://example/s> <http://example/p> <http://example/o2>)") ;
        dsg.add(q1) ;
        dsg.add(q2) ;
        return ds ;
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{
    public static void main(String... argv)
    {
        String assemblerFile = "Store/tdb-assembler.ttl" ;

        Dataset ds = TDBFactory.assembleDataset(assemblerFile) ;
       
        // ... do work ...
       
        ds.close() ;
    }
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{
    public static void main(String... argv)
    {
        // Direct way: Make a TDB-back Jena model in the named directory.
        String directory = "MyDatabases/DB1" ;
        Dataset dataset = TDBFactory.createDataset(directory) ;
       
        // Potentially expensive query.
        String sparqlQueryString = "SELECT (count(*) AS ?count) { ?s ?p ?o }" ;
        // See http://www.openjena.org/ARQ/app_api.html
       
        Query query = QueryFactory.create(sparqlQueryString) ;
        QueryExecution qexec = QueryExecutionFactory.create(query, dataset) ;
        try {
          ResultSet results = qexec.execSelect() ;
          for ( ; results.hasNext() ; )
          {
              QuerySolution soln = results.nextSolution() ;
              int count = soln.getLiteral("count").getInt() ;
              System.out.println("count = "+count) ;
          }
        } finally { qexec.close() ; }

        // Close the dataset.
        dataset.close();
       
    }
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                    throw new JenaException("Failed to find a suitable root") ;
            } catch (TypeNotUniqueException ex)
            { throw new JenaException("Multiple types for: "+DatasetAssemblerVocab.tDataset) ; }
        }

        Dataset ds = (Dataset)Assembler.general.open(root) ;
    }
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{
    public static void main(String... argv)
    {
        // Direct way: Make a TDB-back Jena model in the named directory.
        String directory = "MyDatabases/DB1" ;
        Dataset dataset = TDBFactory.createDataset(directory) ;
       
        // Potentially expensive query.
        String sparqlQueryString = "SELECT (count(*) AS ?count) { ?s ?p ?o }" ;
        // See http://www.openjena.org/ARQ/app_api.html
       
        Query query = QueryFactory.create(sparqlQueryString) ;
        QueryExecution qexec = QueryExecutionFactory.create(query, dataset) ;
        ResultSet results = qexec.execSelect() ;
        ResultSetFormatter.out(results) ;
        qexec.close() ;

        dataset.close();
    }
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                qEx.printStackTrace(System.err) ;
                fail("Parse failure: "+qEx.getMessage()) ;
                throw qEx ;
            }

            Dataset dataset = setUpDataset(query, testItem) ;
            if ( dataset == null && ! doesQueryHaveDataset(query) )
                fail("No dataset for query") ;

            QueryExecution qe = null ;
           
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Related Classes of com.hp.hpl.jena.query.Dataset

  • arq.cmdline.ModDatasetGeneral
  • arq.examples.riot.ExRIOT_3
  • arq.query
  • arq.sse_query
  • cmd.nodetablebuilder
  • com.github.jsonldjava.jena.ExampleTest
  • com.github.jsonldjava.jena.JenaRiotReadWriteTest
  • com.hp.hpl.jena.sdb.assembler.DatasetStoreAssembler
  • com.hp.hpl.jena.sdb.test.junit.QueryTestSDB
  • com.hp.hpl.jena.sdb.test.misc.TestAssembler
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