Examples of org.apache.stanbol.entityhub.servicesapi.model.Representation

Package org.apache.stanbol.entityhub.servicesapi.model

Examples of org.apache.stanbol.entityhub.servicesapi.model.Representation

org.apache.stanbol.entityhub.servicesapi.model.Representation
This interface is used by the Entityhub to define representations. It is used for any kind of CRUD operations on the {@link Yard} (the storage of the Entityhub).
The goal if this interface is to allow implementation based on different storage solutions such as CMS, full text indices, triple stores, noSQL data stores ...
TODO: handling the differences between "NaturalLanguageText", "References" and "normal" values feels to complex! Need to reevaluate if this differentiation is needed or can be done in a more easy way! TODO: add an API that allows to attach Content! TODO: Do we need subNodes or are "references" enough. TODO: Check to use also Wrappers for fields and values (in analogy to {@link Reference} and {@link Text}. PRO: clearer API CON: more Objects to be garbage collected. @author Rupert Westenthaler

            con = repository.getConnection();
            con.begin();
            ArrayList<Representation> added = new ArrayList<Representation>();
            for(Representation representation : representations){
                if(representation != null){
                    Representation stored = store(con, representation,allowCreate,false); //reassign
                    //to check if the store was successful
                    if(stored != null){
                        added.add(stored);
                    } else { //can only be the case if allowCreate==false (update was called)
                        log.warn(String.format("Unable to update Representation %s in Yard %s because it is not present!",

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    protected final Representation store(Representation representation,boolean allowCreate,boolean canNotCreateIsError) throws IllegalArgumentException, YardException{
        RepositoryConnection con = null;
        try {
            con = repository.getConnection();
            con.begin();
            Representation added = store(con,representation,allowCreate,canNotCreateIsError);
            con.commit();
            return added;
        } catch (RepositoryException e) {
            throw new YardException("Unable to remove parsed Representations", e);
        } catch (IllegalArgumentException e) {

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    @Test
    public void testUriWithSpaces() throws YardException {
        Yard yard = getYard();
        String id1 = "http://www.example.com/with space";
        String id2 = "http://www.example.com/other";
        Representation test1 = create(id1,true);
        Representation test2 = create(id2,true);
        //now add a label containing space to id2
        test1.addNaturalText(NamespaceEnum.rdfs+"label","expected result","en");
        test2.addNaturalText(NamespaceEnum.rdfs+"label","space","en");
        test2.addNaturalText(NamespaceEnum.rdfs+"comment","URIs with space got separated "
            + "in queries causing parts in URIs after spaces to form full text " 
            + "queries instead!","en");
        yard.update(test1);
        yard.update(test2);
        //now try to query for some combination
        assertNull("No Entity with ID 'http://www.example.com/with URIs' expected",
            yard.getRepresentation("http://www.example.com/with URIs"));
        assertNull("No Entity with ID 'http://www.example.com/with' expected",
            yard.getRepresentation("http://www.example.com/with"));
        //no check that lookups do work withspace uris
        Representation result = yard.getRepresentation(id1);
        assertNotNull("Entity with ID 'http://www.example.com/with space' expected",
            result);
        assertEquals("Entity with id '"+id1+"' expected, but got '"
            + result.getId() + "' instead", id1, result.getId());
        //finally test removal of Entities with space
        yard.remove(id1);
        assertNull("Entity with ID 'http://www.example.com/with space' got not deleted",
            yard.getRepresentation(id1));
        //and also clean up the 2nd entity used for the test

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        Yard yard = getYard();


        String id1 = "urn:yard.test.testFieldQuery:representation.id1";
        String id2 = "urn:yard.test.testFieldQuery:representation.id2";
        String field = "urn:the.field:used.for.testFieldQuery";
        Representation test1 = create(id1, true);
        Representation test2 = create(id2, true);
        // change the representations to be sure to force an update even if the
        // implementation checks for changes before updating a representation
        test1.add(field, "This is the text content of a field with value1.");
        test2.add(field, "This is the text content of a field with value2.");
        Iterable<Representation> updatedIterable = yard.update(Arrays.asList(test1, test2));
        assertNotNull(updatedIterable);


        FieldQuery query = yard.getQueryFactory().createFieldQuery();
        query.setConstraint(field, new TextConstraint(Arrays.asList("text content")));
        QueryResultList<Representation> results = yard.find(query);
        assertEquals(2, results.size());


        // fetch the light / minimal representation
        query = yard.getQueryFactory().createFieldQuery();
        query.setConstraint(field, new TextConstraint(Arrays.asList("value2")));
        results = yard.find(query);
        assertEquals(1, results.size());
        Representation result = results.iterator().next();
        assertEquals("urn:yard.test.testFieldQuery:representation.id2", result.getId());
        assertEquals(null, result.getFirst(field));


        // fetch the full representation
        results = yard.findRepresentation(query);
        assertEquals(1, results.size());
        result = results.iterator().next();
        assertEquals("urn:yard.test.testFieldQuery:representation.id2", result.getId());
        assertEquals("This is the text content of a field with value2.", result.getFirst(field));
    }

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        String id1 = "urn:yard.test.testFieldQueryWithSimilarityConstraint:representation.id1";
        String id2 = "urn:yard.test.testFieldQueryWithSimilarityConstraint:representation.id2";
        String id3 = "urn:yard.test.testFieldQueryWithSimilarityConstraint:representation.id3";
        String similarityfield = NamespaceEnum.rdfs+"comment";
        String filterfield = "urn:the.field:used.for.testFieldQueryWithSimilarityConstraint.filter";
        Representation test1 = create(id1, true);
        Representation test2 = create(id2, true);
        Representation test3 = create(id3, true);
        // change the representations to be sure to force an update even if the
        // implementation checks for changes before updating a representation
        test1.add(similarityfield, "aaaa aaaa aaaa bbbb bbbb cccc cccc dddd dddd");
        test1.add(filterfield, "Some text content");


        test2.add(similarityfield, "aaaa bbbb bbbb bbbb bbbb eeee");
        test2.add(filterfield, "Some other content");


        test3.add(similarityfield, "eeee eeee ffff gggg");
        test3.add(filterfield, "Different content");


        Iterable<Representation> updatedIterable = yard.update(Arrays.asList(test1, test2, test3));
        assertNotNull(updatedIterable);


        // Perform a first similarity query that looks a lot like the first document
        FieldQuery query = yard.getQueryFactory().createFieldQuery();
        query.setConstraint(similarityfield, new SimilarityConstraint("aaaa aaaa aaaa aaaa zzzz yyyy"));
        QueryResultList<Representation> results = yard.find(query);
        assertEquals(2, results.size());
        Iterator<Representation> it = results.iterator();
        Representation first = it.next();
        assertEquals("urn:yard.test.testFieldQueryWithSimilarityConstraint:representation.id1", first.getId());
        // assertEquals(0.99, first.getFirst("http://www.iks-project.eu/ontology/rick/query/score"));


        Representation second = it.next();
        assertEquals("urn:yard.test.testFieldQueryWithSimilarityConstraint:representation.id2",
            second.getId());
        // assertEquals(0.80, first.getFirst("http://www.iks-project.eu/ontology/rick/query/score"));


        // combine similarity with traditional filtering
        query = yard.getQueryFactory().createFieldQuery();
        query.setConstraint(similarityfield, new SimilarityConstraint("aaaa aaaa aaaa aaaa zzzz yyyy"));

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        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Double.NaN)));
        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Double.POSITIVE_INFINITY)));
        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Double.NEGATIVE_INFINITY)));
        
        RdfValueFactory vf = new RdfValueFactory(graph);
        Representation r = vf.createRepresentation(id.getUnicodeString());
        Set<Double> expected = new HashSet<Double>(Arrays.asList(
            Double.NaN, Double.POSITIVE_INFINITY,Double.NEGATIVE_INFINITY));
        Iterator<Double> dit = r.get(doubleTestField.getUnicodeString(), Double.class);
        while(dit.hasNext()){
            Double val = dit.next();
            Assert.assertNotNull(val);
            Assert.assertTrue(expected.remove(val));
        }

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        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Float.NaN)));
        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Float.POSITIVE_INFINITY)));
        graph.add(new TripleImpl(id, doubleTestField, lf.createTypedLiteral(Float.NEGATIVE_INFINITY)));
        
        RdfValueFactory vf = new RdfValueFactory(graph);
        Representation r = vf.createRepresentation(id.getUnicodeString());
        Set<Float> expected = new HashSet<Float>(Arrays.asList(
            Float.NaN, Float.POSITIVE_INFINITY,Float.NEGATIVE_INFINITY));
        Iterator<Float> dit = r.get(doubleTestField.getUnicodeString(), Float.class);
        while(dit.hasNext()){
            Float val = dit.next();
            Assert.assertNotNull(val);
            Assert.assertTrue(expected.remove(val));
        }

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     */
    private void addResourceDescription(UriRef iri, MGraph mGraph) {
        final Entity entity = siteManager.getEntity(iri.getUnicodeString());
        if (entity != null) {
            final RdfValueFactory valueFactory = new RdfValueFactory(mGraph);
            final Representation representation = entity.getRepresentation();
            if (representation != null) {
                valueFactory.toRdfRepresentation(representation);
            }
            final Representation metadata = entity.getMetadata();
            if (metadata != null) {
                valueFactory.toRdfRepresentation(metadata);
            }
        }
    }

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    @Test
    public void testIncludeConfig(){
        EntityProcessor filter = new FieldValueFilter(nsPrefixProvider,"rdf:type","foaf:Person");
        
        Representation r = getRepresentation(NamespaceEnum.foaf+"Person");
        Assert.assertNotNull(filter.process(r));
        
        r = getRepresentation(NamespaceEnum.skos+"Concept");
        Assert.assertNull(filter.process(r));

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    @Test
    public void testExcludeConfig(){
        EntityProcessor filter = new FieldValueFilter(nsPrefixProvider,"rdf:type","*;!foaf:Person");
        
        Representation r = getRepresentation(NamespaceEnum.foaf+"Person");
        Assert.assertNull(filter.process(r));
        
        r = getRepresentation(NamespaceEnum.skos+"Concept");
        Assert.assertNotNull(filter.process(r));

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