kendall

@RdfProperty("dc:title")
private String title;
  
@RdfProperty("dc:publisher")
private String publisher;
  
@RdfProperty("dc:issued")
private Date issued;
  
@RdfProperty("frbr:embodiment")

kendall

Empire.init(new OpenRdfEmpireModule());

kendall

EntityManager aManager = Persistence.createEntityManagerFactory("oreilly")
                                    .createEntityManager();

kendall

Book aBook = aManager.find(Book.class, URI.create("urn:x-domain:oreilly.com:product:9780596514129.IP"));
  
// prints: Switching to the Mac: The Missing Manual, Leopard Edition
System.err.println(aBook.getTitle());
  
// prints: O'Reilly Media / Pogue Press
System.err.println(aBook.getPublisher());

kendall

Book aNewBookCopy = aManager.find(Book.class, aNewBook.getRdfId());
  
// true!
System.err.println(aNewBook.equals(aNewBookCopy));

kendall

// let's edit our book...maybe we changed the title and published as a PDF
aNewBook.setTitle("Return of the Empire");
  
// create a new manifestation
Manifestation aPDFManifestation = new Manifestation();
aPDFManifestation.setIssued(new Date());
// set the dc:type attribute
aPDFManifestation.setType(URI.create("http://purl.oreilly.com/product-types/PDF"));
          
aNewBook.setEmbodiments(Arrays.asList(aPDFManifestation));

kendall

// but can be refreshed...
aManager.refresh(aNewBookCopy);
          
// and now contains the correct, up-to-date information
System.err.println(aNewBookCopy.getTitle());
System.err.println(aNewBookCopy.getEmbodiments());

kendall

// Lastly, we can use the query API to run arbitrary sparql queries
// create a jpql-style partial SPARQL query (JPQL is currently unsupported)
Query aQuery = aManager.createQuery("where { ?result frbr:embodiment ?manifest." +
                        " ?foo <http://purl.org/goodrelations/v1#typeOfGood> ?manifest . " +
                        " ?foo <http://purl.org/goodrelations/v1#hasPriceSpecification> ?price. " +
                        " ?price <http://purl.org/goodrelations/v1#hasCurrencyValue> ?value. " +
                        " ?price <http://purl.org/goodrelations/v1#hasCurrency> \"USD\"@en." +
                        " filter(?value > ??min). }");
  
// this query should return instances of type Book

kendall

// now we can delete our new book
aManager.remove(aNewBook);
          
// false!
System.err.println(aManager.contains(aNewBook));
          
// but the new manifestation still exists, since we did not specify that deletes should cascade...
          
// true!
System.err.println(aManager.contains(aPDFManifestation));

kendall

{
"service-discovery" : {
"response-mimetype" : [ "text/json", "application/rdf+xml", "application/x-turtle", "application/x-ntriples" ],
     "endpoint" : { 
             "http-methods" : [ "GET" ], 
             "url" : "http://foo:8080/"
                  }
                     },
  "knowledge-bases" : [ { 
             "name" : "wine",