Examples of org.apache.clerezza.rdf.core.LiteralFactory

org.apache.clerezza.rdf.core.LiteralFactory
This class provides methods to convert java objects to typed literals and vice versa. While the default implementation will provide literal objects storing the data's lexical form in memory, other implementations may create literal optimized for processing within the store. Note: this class uses the notion of "Convertor" (in the Exception naming), but does not currently provide a mechanism to register such Convertors. An implementation is said to provide Convertors for the types it supports. @since 0.3 @author reto

  }


  private static void replaceProp(UriRef subject, UriRef predicate,
      Iterator<Resource> valIter, TripleCollection contentGraph,
      Map.Entry<Property, String> entry) {
    LiteralFactory fac = LiteralFactory.getInstance();
    Set<Triple> triplesToBeRemoved = new HashSet<Triple>();
    if (valIter.hasNext()) {
      triplesToBeRemoved.add(new TripleImpl(subject, predicate, valIter.next()));
    }
    contentGraph.removeAll(triplesToBeRemoved);
    contentGraph.add(new TripleImpl(subject, predicate,
        fac.createTypedLiteral(entry.getValue())));
  }

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  @Override
  public GraphNode getExceptionGraphNode() {
    GraphNode result = new GraphNode(new BNode(), new SimpleMGraph());
    result.addProperty(RDF.type, TYPERENDERING.Exception);
    LiteralFactory factory = LiteralFactory.getInstance();
    result.addProperty(TYPERENDERING.errorSource, new UriRef(renderingSpecification.toString()));
    if (lineNumber != -1) {
      result.addProperty(TYPERENDERING.line, factory.createTypedLiteral(new Integer(lineNumber)));
    }
    if (columnNumber != -1) {
      result.addProperty(TYPERENDERING.column, factory.createTypedLiteral(Integer.valueOf(columnNumber)));
    }
    result.addProperty(TYPERENDERING.message, new PlainLiteralImpl(getMessage()));
    return result;
  }

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  @Test
  public void dateStorage() {
    MGraph graph = getEmptyMGraph();
    Date date = new Date(0);
    LiteralFactory literalFactory = LiteralFactory.getInstance();
    TypedLiteral dateLiteral = literalFactory.createTypedLiteral(date);
    Triple triple = new TripleImpl(new BNode(), new UriRef("http://example.com/property"), dateLiteral);
    graph.add(triple);
    Assert.assertTrue(graph.contains(triple));
  }

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  @Test
  public void dateStorage2() {
    MGraph graph = getEmptyMGraph();
    Date date = new Date(0);
    LiteralFactory literalFactory = LiteralFactory.getInstance();
    TypedLiteral dateLiteral = literalFactory.createTypedLiteral(date);
    System.out.println(dateLiteral);
    UriRef property = new UriRef("http://example.com/property");
    Triple triple = new TripleImpl(new BNode(), property, dateLiteral);
    graph.add(triple);

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        confidence
    }


    private void initOccurrences() {
        MGraph graph = contentItem.getMetadata();
        LiteralFactory lf = LiteralFactory.getInstance();
        Map<UriRef,Collection<NonLiteral>> suggestionMap = new HashMap<UriRef,Collection<NonLiteral>>();
        // 1) get Entity Annotations
        Map<NonLiteral,Map<EAProps,Object>> entitySuggestionMap = new HashMap<NonLiteral,Map<EAProps,Object>>();
        Iterator<Triple> entityAnnotations = graph.filter(null, RDF.type, ENHANCER_ENTITYANNOTATION);
        while (entityAnnotations.hasNext()) {

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    /**
     * @return an RDF/JSON descriptions of places for the word map widget
     */
    public String getPlacesAsJSON() throws ParseException, UnsupportedEncodingException {
        MGraph g = new IndexedMGraph();
        LiteralFactory lf = LiteralFactory.getInstance();
        MGraph metadata = contentItem.getMetadata();
        for (EntityExtractionSummary p : getPlaceOccurrences()) {
            EntitySuggestion bestGuess = p.getBestGuess();
            if (bestGuess == null) {
                continue;
            }
            UriRef uri = new UriRef(bestGuess.getUri());
            Iterator<Triple> latitudes = metadata.filter(uri, GEO_LAT, null);
            if (latitudes.hasNext()) {
                g.add(latitudes.next());
            }
            Iterator<Triple> longitutes = metadata.filter(uri, GEO_LONG, null);
            if (longitutes.hasNext()) {
                g.add(longitutes.next());
                g.add(new TripleImpl(uri, Properties.RDFS_LABEL, lf.createTypedLiteral(bestGuess.getLabel())));
            }
        }
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        serializer.serialize(out, g, SupportedFormat.RDF_JSON);

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            throw new IllegalStateException("Unable to extract Language for " + "ContentItem " + ci.getUri() + ": This is also checked in the canEnhance " + "method! -> This indicated an Bug in the implementation of the " + "EnhancementJobManager!");
        }
        Language lang = new Language(language); //used for the palin literals in TextAnnotations
    try {
      List<SentimentExpression> lista = this.client.extractSentimentExpressions(text, language);
      LiteralFactory literalFactory = LiteralFactory.getInstance();


      MGraph g = ci.getMetadata();


      for (SentimentExpression se : lista) {
        try {
          UriRef textAnnotation = EnhancementEngineHelper.createTextEnhancement(ci, this);
          //add selected text as PlainLiteral in the language extracted from the text
          g.add(new TripleImpl(textAnnotation, ENHANCER_SELECTED_TEXT,  new PlainLiteralImpl(se.getSnippetStr(),lang)));
          g.add(new TripleImpl(textAnnotation, DC_TYPE, CeliConstants.SENTIMENT_EXPRESSION));
          if (se.getStartSnippet() != null && se.getEndSnippet() != null) {
            g.add(new TripleImpl(textAnnotation, ENHANCER_START, literalFactory.createTypedLiteral(se.getStartSnippet().intValue())));
            g.add(new TripleImpl(textAnnotation, ENHANCER_END, literalFactory.createTypedLiteral(se.getEndSnippet().intValue())));
            g.add(new TripleImpl(textAnnotation, ENHANCER_SELECTION_CONTEXT, 
                  new PlainLiteralImpl(getSelectionContext(text, se.getSnippetStr(), se.getStartSnippet()), lang)));
            g.add(new TripleImpl(textAnnotation, CeliConstants.HAS_SENTIMENT_EXPRESSION_POLARITY, literalFactory.createTypedLiteral(se.getSentimentPolarityAsDoubleValue())));
          }
        } catch (NoConvertorException e) {
          log.error(e.getMessage(), e);
        }
      }

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      throw new EngineException("Error wile encoding/decoding the request/" + "response to the CELI lemmatizer service!", e);
    }
    // get a write lock before writing the enhancements
    ci.getLock().writeLock().lock();
    try {
      LiteralFactory literalFactory = LiteralFactory.getInstance();
      for (LexicalEntry le : terms) {


        List<CeliMorphoFeatures> mFeatures = this.convertLexicalEntryToMorphFeatures(le, language);
        for (CeliMorphoFeatures feat : mFeatures) {
          // Create a text annotation for each interpretation produced by the morphological analyzer
          UriRef textAnnotation = EnhancementEngineHelper.createTextEnhancement(ci, this);
          g.add(new TripleImpl(textAnnotation, ENHANCER_SELECTED_TEXT, new PlainLiteralImpl(le.getWordForm(), lang)));
          if (le.from >= 0 && le.to > 0) {
            g.add(new TripleImpl(textAnnotation, ENHANCER_START, literalFactory.createTypedLiteral(le.from)));
            g.add(new TripleImpl(textAnnotation, ENHANCER_END, literalFactory.createTypedLiteral(le.to)));
            g.add(new TripleImpl(textAnnotation, ENHANCER_SELECTION_CONTEXT, new PlainLiteralImpl(getSelectionContext(text, le.getWordForm(), le.from), lang)));
          }
          g.addAll(feat.featuresAsTriples(textAnnotation, lang));
        }
      }

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    }


    @Override
    public MGraph annotateGraph(Graph rawRDF) {
        MGraph graph = new SimpleMGraph(rawRDF);
        LiteralFactory literalFactory = LiteralFactory.getInstance();
        Iterator<Triple> tripleIterator = graph.filter(null, targetResourcePredicate, targetResourceValue);
        List<NonLiteral> processedURIs = new ArrayList<NonLiteral>();


        // add cms object annotations
        while (tripleIterator.hasNext()) {
            Triple t = tripleIterator.next();
            NonLiteral subject = t.getSubject();
            String name = getObjectName(subject, nameResource, graph, false);


            // There should be a valid name for CMS Object
            if (!name.contentEquals("")) {
                graph.add(new TripleImpl(subject, RDFBridgeHelper.RDF_TYPE, CMSAdapterVocabulary.CMS_OBJECT));
                processedURIs.add(subject);


                /*
                 * if this object has already has name and path annotations, it means that it's already
                 * processed as child of another object. So, don't put new name annotations
                 */
                if (!graph.filter(subject, CMSAdapterVocabulary.CMS_OBJECT_NAME, null).hasNext()) {
                    graph.add(new TripleImpl(subject, CMSAdapterVocabulary.CMS_OBJECT_NAME, literalFactory
                            .createTypedLiteral(name)));
                }


                // check children and add child and parent annotations
                checkChildren(subject, processedURIs, graph);

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        RDFBridgeHelper.addPathAnnotations(cmsPath, processedURIs, graph);
        return graph;
    }


    private void checkChildren(NonLiteral objectURI, List<NonLiteral> processedURIs, MGraph graph) {
        LiteralFactory literalFactory = LiteralFactory.getInstance();
        for (UriRef childPropURI : targetChildrenMappings.keySet()) {
            Iterator<Triple> childrenIt = graph.filter(objectURI, childPropURI, null);
            Map<String,Integer> childNames = new HashMap<String,Integer>();
            while (childrenIt.hasNext()) {
                Triple child = childrenIt.next();
                NonLiteral childSubject = new UriRef(RDFBridgeHelper.removeEndCharacters(child.getObject()
                        .toString()));


                String childName = getChildName(childSubject, targetChildrenMappings.get(childPropURI), graph);
                if (!childName.contentEquals("")) {
                    RDFBridgeHelper.removeExistingTriple(childSubject, CMSAdapterVocabulary.CMS_OBJECT_NAME,
                        graph);
                    graph.add(new TripleImpl(childSubject, RDFBridgeHelper.RDF_TYPE,
                            CMSAdapterVocabulary.CMS_OBJECT));
                    graph.add(new TripleImpl(childSubject, CMSAdapterVocabulary.CMS_OBJECT_PARENT_REF,
                            objectURI));
                    graph.add(new TripleImpl(childSubject, CMSAdapterVocabulary.CMS_OBJECT_NAME,
                            literalFactory.createTypedLiteral(checkDuplicateChildName(childName, childNames))));


                } else {
                    log.warn("Failed to obtain a name for child property: {}", childPropURI);
                }
            }

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