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

     * @param representation The representation to map
     * @return the mapped representation
     */
    private Representation applyCacheMappings(Yard yard, Representation representation) {
        long start = System.currentTimeMillis();
        Representation mapped = null;
        ValueFactory valueFactory = getValueFactory();
        if (baseMapper != null) {
            mapped = yard.getValueFactory().createRepresentation(representation.getId());
            baseMapper.applyMappings(representation, mapped,valueFactory);
        }

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        if (yard == null) {
            throw new YardException(String.format("The Yard %s for this cache is currently not available", yardId));
        } else {
            //ensure that the baseConfig (if present) is not deleted by this
            //operation
            Representation baseConfig = yard.getRepresentation(Cache.BASE_CONFIGURATION_URI);
            yard.removeAll();
            if(baseConfig != null){
                yard.store(baseConfig);
            }
        }

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    public void testIsRepresentation() throws YardException {
        String id = "urn:yard.test.testIsRepresentation:representation.id";
        Yard yard = getYard();
        // Representations created via the yard need to be created (as empty
        // representation within the yard
        Representation test = create();
        assertTrue(yard.isRepresentation(test.getId()));
        // Representations created via the ValueFactory MUST NOT be added to the
        // Yard
        Representation test2 = create(id, false);
        assertFalse(yard.isRepresentation(test2.getId()));
        // now store test2 and test again
        yard.store(test2);
        assertTrue(yard.isRepresentation(test2.getId()));
        // now remove test and test again
        yard.remove(test.getId());
        assertFalse(yard.isRepresentation(test.getId()));
        yard.remove(test2.getId());
        assertFalse(yard.isRepresentation(test2.getId()));
    }

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    }


    @Test(expected = IllegalArgumentException.class)
    public void testUpdateRepresentationWithNonPresent() throws YardException {
        String id = "urn:yard.test.testUpdateRepresentationWithNonPresent:representation.id";
        Representation test = create(id, false);
        getYard().update(test); // throws an Exception because test is not part of the yard
    }

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        // stored, but only that the update method works correctly
        Yard yard = getYard();
        String id1 = "urn:yard.test.testUpdateRepresentations:representation.id1";
        String id2 = "urn:yard.test.testUpdateRepresentations:representation.id2";
        String field = "urn:the.field:used.for.this.Test";
        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, "test value 1");
        test2.add(field, "test value 2");
        Iterable<Representation> updatedIterable = yard.update(Arrays.asList(test1, test2));
        assertNotNull(updatedIterable);
        Collection<Representation> updated = asCollection(updatedIterable.iterator());
        // test that both the parsed Representations where stored (updated & created)
        assertTrue(updated.remove(test1));

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        // NOTE: this does not test if the updated view of the representation is
        // stored, but only that the update method works correctly
        Yard yard = getYard();
        String id1 = "urn:yard.test.testUpdateRepresentationsWithNullElement:representation.id";
        String field = "urn:the.field:used.for.this.Test";
        Representation test1 = create(id1, 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, "test value 1");
        Iterable<Representation> updated = yard.update(Arrays.asList(test1, null));
        assertNotNull(updated);
        Iterator<Representation> updatedIt = updated.iterator();
        assertTrue(updatedIt.hasNext());
        assertEquals(test1, updatedIt.next());

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            return null;
        }
        Yard entityhubYard = lookupYard();
        ValueFactory valueFactory = entityhubYard.getValueFactory();
        //Create the locally managed Entity
        Representation localRep = entityhubYard.create(constructResourceId(DEFAULT_MANAGED_ENTITY_PREFIX));
        Entity localEntity = loadEntity(entityhubYard, localRep);
        importEntity(remoteEntity, site, localEntity, valueFactory);


        //Second create and init the Mapping
        Representation entityMappingRepresentation = entityhubYard.create(
            constructResourceId(DEFAULT_MAPPING_PREFIX));
        Entity entityMappingEntity = loadEntity(entityhubYard, entityMappingRepresentation);
        establishMapping(localEntity, remoteEntity, site, entityMappingEntity);
        
        //Store the entity and the mappedEntity in the entityhubYard

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        // stored, but only that the update method works correctly
        Yard yard = getYard();
        String id1 = "urn:yard.test.testUpdateRepresentationsWithNonPresent:representation.id1";
        String id2 = "urn:yard.test.testUpdateRepresentationsWithNonPresent:representation.id2";
        String field = "urn:the.field:used.for.this.Test";
        Representation test1 = create(id1, 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, "test value 1");
        // create a 2nd Representation by using the ValueFactory (will not add it
        // to the yard!)
        Representation test2 = create(id2, false);
        // now test1 is present and test2 is not.
        Iterable<Representation> updated = yard.update(Arrays.asList(test1, test2));
        // We expect that only test1 is updated and test2 is ignored
        assertNotNull(updated);
        Iterator<Representation> updatedIt = updated.iterator();

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     * thread has deleted that Entity in the meantime)
     * @throws YardException On any error with the parsed Yard.
     */
    private Entity loadEntity(Yard entityhubYard, Representation rep) throws YardException {
        if(rep != null){
            Representation data;
            Representation metadata = null;
            String entityId = ModelUtils.getAboutRepresentation(rep);
            if(entityId != null){
                data = entityhubYard.getRepresentation(entityId);
                metadata = rep;
            } else {

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     * @return the metadata for that Entity or <code>null</code> if not existing
     * and <code>init == false</code>
     * @throws YardException
     */
    private Representation lookupMetadata(Yard entityhubYard, String entityId, boolean init) throws YardException {
        Representation metadata;
        //TODO: check the asumption that the Metadata always use the
        //      extension ".meta"
        String metaID = entityId+".meta";
        metadata = entityhubYard.getRepresentation(metaID);
        if(metadata == null){

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