Examples of KiWiTriple

org.apache.marmotta.kiwi.model.rdf.KiWiTriple
KiWiTriples are one of the core concepts of the KiWi system. They correspond to triples in RDF, but extend them with additional information that is useful and/or needed in the KiWi system, for example author information, version information, justifications (in case of inferred triples), etc. Like a KiWiResource, each triple is associated with a single TripleStore. All triples together essentially make up the TripleStore. As with KiWiResources, this means that there is no 1:1 correspondence between RDF triples and KiWi triples. An RDF triple may be represented by several KiWi triples in different KnowledgeSpaces.
Base/inferred flags denote the status of support of a triple:
- base=true, inferred=true means the triple is both explicit and supported by a rule
- base=false, inferred=true means triple is supported by a rule but not explicit
- base=true, inferred=false means triple is only explicit
- base=false, inferred=false does not exist
Only triples where base=true can be deleted using TripleStore.removeTriple; triples with base=false and inferred=true are managed by the reasoner. @author Sebastian Schaffert

Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

     */
    private Date lastModified(RepositoryConnection conn, Resource resource) throws RepositoryException {
        Date last_modified = new Date(0);
        for (Statement triple : listOutgoing(conn, resource)) {
            if(triple instanceof KiWiTriple) {
                KiWiTriple t = (KiWiTriple)triple;
                if (t.getCreated().getTime() > last_modified.getTime()) {
                    last_modified = t.getCreated();
                }
            }
        }
        return last_modified;

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

        RepositoryResult<Statement> triples = conn.getStatements(resource, null, null, false);
        try {
            while (triples.hasNext()) {
                Statement triple = triples.next();
                if (triple instanceof KiWiTriple) {
                    KiWiTriple t = (KiWiTriple) triple;
                    if (t.getCreated().getTime() > last_modified.getTime()) {
                        last_modified = t.getCreated();
                    }
                }
            }
        } finally {
            triples.close();

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

                connection.storeNode(pred_2, false);
                connection.storeNode(object_1, false);
                connection.storeNode(object_2, false);
                connection.storeNode(context, false);


                KiWiTriple triple1 = new KiWiTriple(subject,pred_1,object_1,context);
                KiWiTriple triple2 = new KiWiTriple(subject,pred_2,object_2,context);


                connection.storeTriple(triple1);
                connection.storeTriple(triple2);


                // check querying within transaction
                List<Statement> result1 = connection.listTriples(subject,null,null,null,false, true).asList();
                Assert.assertThat(result1,hasItems((Statement)triple1,(Statement)triple2));


                Assert.assertEquals(2, connection.getSize());
                Assert.assertEquals(2, connection.getSize(context));
                Assert.assertEquals(0, connection.getSize(subject));


                connection.commit();


                List<Statement> result2 = connection.listTriples(subject,null,null,null,false, true).asList();
                Assert.assertThat(result2,hasItems((Statement)triple1,(Statement)triple2));


                Assert.assertEquals(2, connection.getSize());
                Assert.assertEquals(2, connection.getSize(context));
                Assert.assertEquals(0, connection.getSize(subject));


                Assert.assertThat(Iterations.asList(connection.listContexts()), hasItem((KiWiResource)context));


                // clear cache and test again
                persistence.clearCache();


                List<Statement> result3 = connection.listTriples(subject,null,null,null,false, true).asList();
                Assert.assertThat(result3,hasItems((Statement)triple1,(Statement)triple2));




                Assert.assertEquals(2, connection.getSize());
                Assert.assertEquals(2, connection.getSize(context));
                Assert.assertEquals(0, connection.getSize(subject));


                // test database contents
                PreparedStatement stmt = connection.getJDBCConnection().prepareStatement("SELECT * FROM triples WHERE deleted = false ORDER BY subject, predicate");
                ResultSet dbResult1 = stmt.executeQuery();


                Assert.assertTrue(dbResult1.next());
                Assert.assertEquals((long) triple1.getId(), dbResult1.getLong("id"));
                Assert.assertEquals((long) triple1.getSubject().getId(), dbResult1.getLong("subject"));
                Assert.assertEquals((long) triple1.getPredicate().getId(), dbResult1.getLong("predicate"));
                Assert.assertEquals((long)triple1.getObject().getId(),dbResult1.getLong("object"));


                Assert.assertTrue(dbResult1.next());
                Assert.assertEquals((long)triple2.getId(),dbResult1.getLong("id"));
                Assert.assertEquals((long)triple2.getSubject().getId(),dbResult1.getLong("subject"));
                Assert.assertEquals((long)triple2.getPredicate().getId(),dbResult1.getLong("predicate"));
                Assert.assertEquals((long)triple2.getObject().getId(),dbResult1.getLong("object"));


                dbResult1.close();


                connection.commit();
            } finally {

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

                    tjs.add(j);
                }
                result.append("[");


                for(Iterator<KiWiTriple> it = grouped.keySet().iterator(); it.hasNext(); ) {
                    KiWiTriple t = it.next();
                    result.append(formatJSON(t, grouped.get(t)));


                    if(it.hasNext()) {
                        result.append(",\n");
                    } else {

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

        for(Iterator<Justification> justs = justifications.iterator(); justs.hasNext(); ) {
            Justification justification = justs.next();
            result.append("  {\n");
            result.append("    \"triples\": [\n");
            for(Iterator<KiWiTriple> it = justification.getSupportingTriples().iterator(); it.hasNext(); ) {
                KiWiTriple t = it.next();
                result.append("      " + formatJSON(t));
                if(it.hasNext()) {
                    result.append(",\n");
                } else {
                    result.append("\n");

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

            connection.storeNode(pred_2, false);
            connection.storeNode(object_1, false);
            connection.storeNode(object_2, false);
            connection.storeNode(context, false);


            KiWiTriple triple1 = new KiWiTriple(subject1,pred_1,object_1,context);
            KiWiTriple triple2 = new KiWiTriple(subject2,pred_2,object_2,context);


            connection.storeTriple(triple1);
            connection.storeTriple(triple2);
            connection.commit();

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

            connection.storeNode(pred_2, false);
            connection.storeNode(object_1, false);
            connection.storeNode(object_2, false);
            connection.storeNode(context, false);


            KiWiTriple triple1 = new KiWiTriple(subject,pred_1,object_1,context);
            KiWiTriple triple2 = new KiWiTriple(subject,pred_2,object_2,context);


            connection.storeTriple(triple1);
            connection.storeTriple(triple2);
            connection.commit();

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

            connection.storeNode(pred_2, false);
            connection.storeNode(object_1, false);
            connection.storeNode(object_2, false);
            connection.storeNode(context, false);


            KiWiTriple triple1 = new KiWiTriple(subject1,pred_1,object_1,context);
            KiWiTriple triple2 = new KiWiTriple(subject2,pred_2,object_2,context);


            connection.storeTriple(triple1);
            connection.storeTriple(triple2);
            connection.commit();

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

    private void executeReasoner(TransactionData data) {
        try {
            updateTaskStatus("fetching worklist");
            Set<KiWiTriple> newTriples = StatementCommons.newQuadrupleSet();
            for(Statement stmt : data.getAddedTriples()) {
                KiWiTriple t = (KiWiTriple)stmt;
                if(t.isMarkedForReasoning()) {
                    newTriples.add(t);
                    t.setMarkedForReasoning(false);
                }
            }


            //taskManagerService.setTaskSteps(newTriples.size() + data.getRemovedTriples().size());
            // evaluate the rules for all added triples

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Examples of org.apache.marmotta.kiwi.model.rdf.KiWiTriple

     * @param removedTriples
     */
    private void cleanupJustifications(KiWiReasoningConnection connection, TripleTable<Statement> removedTriples) throws SQLException {
        updateTaskStatus("cleaning up justifications for " + removedTriples.size() + " removed triples");
        for(Statement stmt : removedTriples) {
            KiWiTriple t = (KiWiTriple)stmt;
            connection.deleteJustifications(t);
        }
    }

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