Java Code Examples for com.hp.hpl.jena.rdf.model.Resource#getProperty()

public Object open(Assembler ignore, Resource description, Mode ignore2) {
	if (!description.hasProperty(D2RQ.mappingFile)) {
		throw new D2RQException("Error in assembler specification " + description + ": missing property d2rq:mappingFile");
	}
	if (!description.getProperty(D2RQ.mappingFile).getObject().isURIResource()) {
		throw new D2RQException("Error in assembler specification " + description + ": value of d2rq:mappingFile must be a URI");
	}
	String mappingFileURI = ((Resource) description.getProperty(D2RQ.mappingFile).getObject()).getURI();
	String resourceBaseURI = null;
	Statement stmt = description.getProperty(D2RQ.resourceBaseURI);
	if (stmt != null) {
		if (!stmt.getObject().isURIResource()) {
			throw new D2RQException("Error in assembler specification " + description + ": value of d2rq:resourceBaseURI must be a URI");
		}
		resourceBaseURI = ((Resource) stmt.getObject()).getURI();
	}
	return new ModelD2RQ(mappingFileURI, resourceBaseURI);
}
 

public static Statement getBestLabel(Resource resource) {
	Statement label = resource.getProperty(RDFS.label);
	if (label == null)
		label = resource.getProperty(SKOS.prefLabel);
	if (label == null)
		label = resource.getProperty(DC.title);
	if (label == null)
		label = resource.getProperty(DCTerms.title);
	if (label == null)
		label = resource.getProperty(FOAF.name);
	return label;
}
 

public String getLabelForResource(String uri) {
    Resource subject = model.createResource(uri);
    Statement stmt = subject.getProperty(RDFS.label);
    if (stmt != null) {
        RDFNode object = stmt.getObject();
        return object == null ? "" : object.asLiteral().getString();
    } else {
        return "";
    }
}
 

protected void doGet(HttpServletRequest request,
		HttpServletResponse response) throws IOException, ServletException {
	D2RServer server = D2RServer.fromServletContext(getServletContext());
	server.checkMappingFileChanged();
	String relativeResourceURI = request.getRequestURI().substring(
			request.getContextPath().length()
					+ request.getServletPath().length());
	// Some servlet containers keep the leading slash, some don't
	if (!"".equals(relativeResourceURI)
			&& "/".equals(relativeResourceURI.substring(0, 1))) {
		relativeResourceURI = relativeResourceURI.substring(1);
	}
	if (request.getQueryString() != null) {
		relativeResourceURI = relativeResourceURI + "?"
				+ request.getQueryString();
	}

	/* Determine service stem, i.e. vocab/ in /[vocab/]data */
	int servicePos;
	if (-1 == (servicePos = request.getServletPath().indexOf(
			"/" + D2RServer.getDataServiceName())))
		throw new ServletException("Expected to find service path /"
				+ D2RServer.getDataServiceName());
	String serviceStem = request.getServletPath().substring(1,
			servicePos + 1);

	String resourceURI = RequestParamHandler
			.removeOutputRequestParam(server.resourceBaseURI(serviceStem)
					+ relativeResourceURI);
	String documentURL = server.dataURL(serviceStem, relativeResourceURI);

	String pageURL = server.pageURL(serviceStem, relativeResourceURI);

	String sparqlQuery = "DESCRIBE <" + resourceURI + ">";
	QueryExecution qe = QueryExecutionFactory.create(sparqlQuery,
			server.dataset());
	if (server.getConfig().getPageTimeout() > 0) {
		qe.setTimeout(Math.round(server.getConfig().getPageTimeout() * 1000));
	}
	Model description = qe.execDescribe();
	qe.close();
	
	if (description.size() == 0) {
		response.sendError(404);
	}
	if (description.qnameFor(FOAF.primaryTopic.getURI()) == null
			&& description.getNsPrefixURI("foaf") == null) {
		description.setNsPrefix("foaf", FOAF.NS);
	}
	Resource resource = description.getResource(resourceURI);

	Resource document = description.getResource(documentURL);
	document.addProperty(FOAF.primaryTopic, resource);

	Statement label = resource.getProperty(RDFS.label);
	if (label != null) {
		document.addProperty(RDFS.label,
				"RDF Description of " + label.getString());
	}
	server.addDocumentMetadata(description, document);
	if (server.getConfig().serveMetadata()) {
		// add document metadata from template
		Model resourceMetadataTemplate = server.getConfig().getResourceMetadataTemplate(
				server, getServletContext());
		MetadataCreator resourceMetadataCreator = new MetadataCreator(
				server, resourceMetadataTemplate);
		description.add(resourceMetadataCreator.addMetadataFromTemplate(
				resourceURI, documentURL, pageURL));
		
		Map<String, String> descPrefixes = description.getNsPrefixMap();
		descPrefixes.putAll(resourceMetadataTemplate.getNsPrefixMap());
		description.setNsPrefixes(descPrefixes);
	}
	// TODO: Add a Content-Location header
	new ModelResponse(description, request, response).serve();
}
 

private TermMap createTransformationValuedTermMap(Resource r) {
	TransformationValuedTermMap result = new TransformationValuedTermMap();
	result.setFunction(ConstantIRI.create(getString(r, RRX.function)));
	
	
	List<TermMap> arguments=new ArrayList<TermMap>();
	//Resource list = getResource(r, RRX.argumentMap);
	
	RDFNode list2 = r.getProperty(RRX.argumentMap).getObject();;
	
	
	
	RDFList rdfList = list2.as( RDFList.class );
       ExtendedIterator<RDFNode> items = rdfList.iterator();
       while ( items.hasNext() ) {
           Resource item = items.next().asResource();            
           if(item.getProperty(RR.constant)!=null)
           {
   			arguments.add(createConstantValuedTermMap(item));
   		}
           if(item.getProperty(RR.column)!=null) {
			arguments.add(createColumnValuedTermMap(item));
		}
		if(item.getProperty(RRX.function)!=null) {
			arguments.add(createTransformationValuedTermMap(item));
		}
		if(item.getProperty(RR.template)!=null) {
			arguments.add(createTemplateValuedTermMap(item));
		}
           
       }
	
	
	
	
	
	
	
	
       
	result.setTermMaps(arguments);
	readColumnOrTemplateValuedTermMap(result, r);
	return result;
}