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move generic rdf serialization helpers into -kernel
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cbeer committed Jul 11, 2013
1 parent f1e51f3 commit ecdc0e7
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Showing 2 changed files with 75 additions and 1 deletion.
Expand Up @@ -33,6 +33,19 @@ public class SerializationUtils {

private static final Logger logger = getLogger(SerializationUtils.class);

public static final Symbol subjectKey = Symbol.create("uri");

/**
* Set the subject of the dataset by injecting a context "uri"
*
* @param rdf
* @return
*/
public static void setDatasetSubject(final Dataset rdf, final String uri) {
Context context = rdf.getContext();
context.set(subjectKey, uri);
}

/**
* Get the subject of the dataset, given by the context's "uri"
*
Expand All @@ -41,7 +54,7 @@ public class SerializationUtils {
*/
public static Node getDatasetSubject(final Dataset rdf) {
Context context = rdf.getContext();
String uri = context.getAsString(Symbol.create("uri"));
String uri = context.getAsString(subjectKey);
logger.debug("uri from context: {}", uri);
if (uri != null) {
return createURI(uri);
Expand Down
@@ -0,0 +1,61 @@
package org.fcrepo.rdf;

import com.hp.hpl.jena.graph.NodeFactory;
import com.hp.hpl.jena.query.Dataset;
import com.hp.hpl.jena.query.DatasetFactory;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class SerializationUtilsTest {


@Test
public void testSetDatasetSubject() {
final Dataset dataset = DatasetFactory.create(ModelFactory.createDefaultModel());

SerializationUtils.setDatasetSubject(dataset, "some-uri");

assertEquals("some-uri", dataset.getContext().getAsString(SerializationUtils.subjectKey));
}

@Test
public void testGetDatasetSubject() {
final Dataset dataset = DatasetFactory.create(ModelFactory.createDefaultModel());

SerializationUtils.setDatasetSubject(dataset, "some-uri");

assertEquals(NodeFactory.createURI("some-uri"), SerializationUtils.getDatasetSubject(dataset));
}

@Test
public void testGetDatasetSubjectWithoutContext() {
final Dataset dataset = DatasetFactory.create(ModelFactory.createDefaultModel());

assertEquals(null, SerializationUtils.getDatasetSubject(dataset));
}

@Test
public void testUnifyDatasetModels() {
final Model model = ModelFactory.createDefaultModel();
model.setNsPrefix("a", "b");
model.add(model.createResource(), model.createProperty("xyz"), "abc");

final Dataset dataset = DatasetFactory.create(model);

final Model model2 = ModelFactory.createDefaultModel();
model.add(model.createResource(), model.createProperty("abc"), "xyz");

dataset.addNamedModel("xyz", model2);


final Model mergedModel = SerializationUtils.unifyDatasetModel(dataset);

assertEquals(model.getNsPrefixMap(), mergedModel.getNsPrefixMap());
assertTrue(mergedModel.containsAll(model));
assertTrue(mergedModel.containsAll(model2));
}
}

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