Java LiteralFactory类代码示例

import org.apache.clerezza.rdf.core.LiteralFactory; //导入依赖的package包/类
@BeforeClass
public static void init(){
    LiteralFactory lf = LiteralFactory.getInstance();
    UriRef pers1 = new UriRef("http://www.example.org/test#pers1");
    UriRef pers2 = new UriRef("http://www.example.org/test#pers2");
    MGraph data = new SimpleMGraph();
    //NOTE: This test a language literal with and without language as
    //      well as a xsd:string typed literal. To test correct handling of
    //      RDF1.1
    data.add(new TripleImpl(pers1, RDF.type, FOAF.Person));
    data.add(new TripleImpl(pers1, FOAF.name, new PlainLiteralImpl("Rupert Westenthaler",
            new Language("de"))));
    data.add(new TripleImpl(pers1, FOAF.nick, new PlainLiteralImpl("westei")));
    data.add(new TripleImpl(pers1, FOAF.mbox, lf.createTypedLiteral("[email protected]")));
    data.add(new TripleImpl(pers1, FOAF.age, lf.createTypedLiteral(38)));
    data.add(new TripleImpl(pers1, FOAF.knows, pers2));
    data.add(new TripleImpl(pers2, FOAF.name, new PlainLiteralImpl("Reto Bachmann-Gmür")));
    rdfData = data.getGraph();
}
 

import org.apache.clerezza.rdf.core.LiteralFactory; //导入依赖的package包/类
private void verifyEnhancement(String text) throws IOException, EngineException {
    final ContentItem ci = prepareContentItem(text);
       try {
        annotateEngine.computeEnhancements(ci);
    } catch (EngineException e) {
           RemoteServiceHelper.checkServiceUnavailable(e);
       }
       
       logEnhancements(ci);
       
       HashMap<UriRef,Resource> expectedValues = new HashMap<UriRef,Resource>();
       expectedValues.put(
               Properties.ENHANCER_EXTRACTED_FROM,
               ci.getUri()
       );
       expectedValues.put(
               Properties.DC_CREATOR,
               LiteralFactory.getInstance().createTypedLiteral(annotateEngine.getClass().getName())
       );
	EnhancementStructureHelper.validateAllTextAnnotations(ci.getMetadata(), text, expectedValues);
	EnhancementStructureHelper.validateAllEntityAnnotations(ci.getMetadata(), expectedValues);
	//we do expect three topics
	Assert.assertEquals(3, EnhancementStructureHelper.validateAllTopicAnnotations(ci.getMetadata(), expectedValues));
}
 

import org.apache.clerezza.rdf.core.LiteralFactory; //导入依赖的package包/类
@Test
  public void testEngine() throws EngineException, IOException {
      final String text = "President Barack Obama pushes Senate for military action in Syria.";
      ContentItem ci = ciFactory.createContentItem(new StringSource(text));
      Assert.assertNotNull(ci);
      AnalysedText at = atFactory.createAnalysedText(ci, ci.getBlob());
      Assert.assertNotNull(at);

      Assert.assertEquals(
              "Cannot enhance Test ContentItem", EnhancementEngine.ENHANCE_ASYNC, engine.canEnhance(ci)
      );

      try {
          engine.computeEnhancements(ci);
      } catch (EngineException e) {
          RemoteServiceHelper.checkServiceUnavailable(e);
      }
      
      logEnhancements(ci);
      
      HashMap<UriRef,Resource> expectedValues = new HashMap<UriRef,Resource>();
      expectedValues.put(Properties.ENHANCER_EXTRACTED_FROM, ci.getUri());
      expectedValues.put(
              Properties.DC_CREATOR,
              LiteralFactory.getInstance().createTypedLiteral(engine.getClass().getName())
      );
      expectedValues.put(Properties.DC_LANGUAGE, LiteralFactory.getInstance().createTypedLiteral("en"));
EnhancementStructureHelper.validateAllTextAnnotations(
              ci.getMetadata(), text, expectedValues
      );
EnhancementStructureHelper.validateAllEntityAnnotations(
		ci.getMetadata(), expectedValues
      );
  }
 

import org.apache.clerezza.rdf.core.LiteralFactory; //导入依赖的package包/类
/**
 * Add dc:subject property to items pointing to entities extracted by NLP
 * engines in the default chain. Given a node and a TripleCollection
 * containing fise:Enhancements about that node dc:subject properties are
 * added to an item pointing to entities referenced by those enhancements if
 * the enhancement confidence value is above a threshold.
 *
 * @param node
 * @param metadata
 */
private void addSubjects(MGraph targetGraph, UriRef itemRef, TripleCollection metadata) {
    final GraphNode enhancementType = new GraphNode(TechnicalClasses.ENHANCER_ENHANCEMENT, metadata);
    final Set<UriRef> entities = new HashSet<UriRef>();
    // get all the enhancements
    final Iterator<GraphNode> enhancements = enhancementType.getSubjectNodes(RDF.type);
    while (enhancements.hasNext()) {
        final GraphNode enhhancement = enhancements.next();
        final Iterator<Literal> confidenceLiterals = enhhancement.getLiterals(org.apache.stanbol.enhancer.servicesapi.rdf.Properties.ENHANCER_CONFIDENCE);
        //look the confidence value for each enhancement
        double enhancementConfidence = confidenceLiterals.hasNext() ? 
                LiteralFactory.getInstance().createObject(Double.class,
                (TypedLiteral) confidenceLiterals.next())  : 1;
        if (enhancementConfidence >= confidenceThreshold) {
            // get entities referenced in the enhancement 
            final Iterator<Resource> referencedEntities = enhhancement.getObjects(org.apache.stanbol.enhancer.servicesapi.rdf.Properties.ENHANCER_ENTITY_REFERENCE);
            while (referencedEntities.hasNext()) {
                final UriRef entity = (UriRef) referencedEntities.next();
                // Add dc:subject to the patent for each referenced entity
                targetGraph.add(new TripleImpl(itemRef, DC.subject, entity));
                entities.add(entity);
            }
        }

    }
    for (UriRef uriRef : entities) {
        // We don't get the entity description directly from metadata
        // as the context there would include
        addResourceDescription(uriRef, targetGraph);
    }
}