Examples of TripleSource

com.clarkparsia.empire.ds.TripleSource

Interface which extends a {@link DataSource} to provide triple-level access to the contents of the data. Where DataSource only provides query level access, TripleSource provides the ability to make SPO "queries" into the database. When the underlying implementation natively supports this interface, there is usually a performance benefit of the "native" access when compared to writing a SPARQL query that will retrieve the same set of statements.
@author Pedro Oliveira @author Michael Grove @since 0.7 @version 0.7
org.openrdf.query.algebra.evaluation.TripleSource
A triple source that can be queried for (the existence of) certain triples in certain contexts. This interface defines the methods that are needed by the Sail Query Model to be able to evaluate itself.

Examples of com.clarkparsia.empire.ds.TripleSource

        Map<String, Object> aMap = Maps.newHashMap();
        aMap.put("factory", "sesame");


        DataSource aSesameSource = Empire.get().persistenceProvider().createDataSource("test-sesame", aMap);


        TripleSource aTripleSrc = DataSourceUtil.asTripleSource(aSesameSource);


        // Sesame sources are triple sources
        assertTrue(aSesameSource == aTripleSrc);
    }

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Examples of com.clarkparsia.empire.ds.TripleSource

  public void testDuplicate() throws Exception {
    EntityManager em = createEntityManager();


    assumeTrue(em.getDelegate() instanceof TripleSource);


    TripleSource aSource = (TripleSource) em.getDelegate();


    EntityTest aObj = InstanceGenerator.generateInstanceClass(EntityTest.class).newInstance();
    aObj.setId("someid");
    aObj.setLabel("some label");


    em.persist(aObj);


    aObj.setLabel("foo");


    em.merge(aObj);


    Graph aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(3, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());


    em.remove(aObj);


    ParentEntity pe = InstanceGenerator.generateInstanceClass(ParentEntity.class).newInstance();
    pe.setEntity(aObj);


    em.persist(pe);


    aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(5, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());


    aObj.setLabel("foobarbaz");


    em.merge(pe);


    aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(5, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());
  }

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Examples of com.clarkparsia.empire.ds.TripleSource

  public void testDuplicate2() throws Exception {
    EntityManager em = createEntityManager();


    assumeTrue(em.getDelegate() instanceof TripleSource);
    
    TripleSource aSource = (TripleSource) em.getDelegate();


    EntityTest aObj = InstanceGenerator.generateInstanceClass(EntityTest.class).newInstance();
    aObj.setId("someid");
    aObj.setLabel("some label");


    em.persist(aObj);


    em.refresh(aObj);


    aObj.setLabel("foo");


    em.merge(aObj);


    Graph aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(3, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());


    em.remove(aObj);


    ParentEntity pe = InstanceGenerator.generateInstanceClass(ParentEntity.class).newInstance();
    pe.setEntity(aObj);


    em.persist(pe);


    em.refresh(pe);


    aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(5, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());


    aObj.setLabel("foobarbaz");


    em.merge(pe);


    aGraph = Graphs.newGraph(aSource.getStatements(null, null, null));


    assertEquals(5, aGraph.size());
    assertEquals(1, Lists.newArrayList(aGraph.match(null, ValueFactoryImpl.getInstance().createURI("urn:label"), null)).size());
  }

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Examples of com.clarkparsia.empire.ds.TripleSource


    // this is a test source, so it should not be a TripleSource...


    assertFalse(aTestSource instanceof TripleSource);


    TripleSource aTripleSrc = DataSourceUtil.asTripleSource(aTestSource);


    assertTrue(aTestSource != aTripleSrc);
  }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

      if (!isAutoCommit()) {
        snapshot++;
        readMode = ReadMode.TRANSACTION;
      }


      TripleSource tripleSource = new MemTripleSource(includeInferred, snapshot, readMode);
      EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, query);


      QueryOptimizerList optimizerList = new QueryOptimizerList();
      optimizerList.add(new BindingAssigner());
      optimizerList.add(new ConstantOptimizer(strategy));

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

  }


  public Cursor<? extends BindingSet> evaluate(QueryModel query, BindingSet bindings, boolean includeInferred)
    throws StoreException
  {
    TripleSource tripleSource = new FederationTripleSource(includeInferred);
    EvaluationStrategyImpl strategy = new FederationStrategy(federation.getExecutor(), tripleSource, query, includeInferred);
    query = optimize(query, bindings, strategy);
    return strategy.evaluate(query, EmptyBindingSet.getInstance());
  }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

    Cursor<BindingSet> result = expr.evaluate(dataset, bindings, includeInferred);
    if (result != null) {
      return result;
    }
    QueryModel query = createQueryModel(expr);
    TripleSource source = new RepositoryTripleSource(expr.getOwner());
    EvaluationStrategyImpl eval = new FederationStrategy(executor, source, query, includeInferred);
    return eval.evaluate(query, bindings);
  }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

    protected CloseableIteration<? extends BindingSet, QueryEvaluationException> evaluateInternal(final TupleExpr query,
                                                                                                  final Dataset dataset,
                                                                                                  final BindingSet bindings,
                                                                                                  final boolean includeInferred) throws SailException {
        try {
            TripleSource tripleSource = new SailConnectionTripleSource(this, context.valueFactory, includeInferred);
            EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);
            return strategy.evaluate(query, bindings);
        } catch (QueryEvaluationException e) {
            throw new SailException(e);
        }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

    public CloseableIteration<? extends BindingSet, QueryEvaluationException> evaluateInternal(TupleExpr tupleExpr,
                                                                                               final Dataset dataset,
                                                                                               final BindingSet bindings,
                                                                                               final boolean includeInferred) throws SailException {
        try {
            TripleSource tripleSource = new SailConnectionTripleSource(this, store.valueFactory, includeInferred);
            EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);
            return strategy.evaluate(tupleExpr, bindings);
        } catch (QueryEvaluationException e) {
            throw new SailException(e);
        }

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Examples of org.openrdf.query.algebra.evaluation.TripleSource

      if (transactionActive()) {
        snapshot++;
        readMode = ReadMode.TRANSACTION;
      }


      TripleSource tripleSource = new MemTripleSource(includeInferred, snapshot, readMode);
      EvaluationStrategyImpl strategy = new EvaluationStrategyImpl(tripleSource, dataset);


      QueryOptimizerList optimizerList = new QueryOptimizerList();
      optimizerList.add(new BindingAssigner());
      optimizerList.add(new ConstantOptimizer(strategy));

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