Examples -> this
This example show how the annotations work on an interface. Note that the entity manger creates an instance of the interface and no direct coding for the Book interface is ever done.
@Subject( namespace="http://example.com/PA4RDF#" ) public interface Book { @Predicate void setTitle( String title ); String getTitle(); @Predicate void addAuthor( String author ); ExtendedIterator<String> getAuthor(); @Predicate void setPageCount( Integer int ); boolean hasPageCount(); int getPageCount(); }
Model model = ModelFactory.createModel(); EntityManager entityManager = EntityManagerFactory.getEntityManager(); Resource r = model.createResource( "http://example.com/mylibrary/book1" ); Book book = EntityManager.read( r, Book.class ); book.setTitle( "Java Generics and Collections" ); book.addAuthor( "Maurice Naftalin" ); book.addAuthor( "Philip Wadler" ); book.setPageCount( 286 );
The above code will result in the following graph:
<http://example.com/mylibrary/book1> <http://example.com/PA4RDF#title> "Java Generics and Collections" ; <http://example.com/PA4RDF#author> "Maurice Naftalin" ; <http://example.com/PA4RDF#author> "Philip Wadler" ; <http://example.com/PA4RDF#pageCount> "286"^^<xsd:integer> ; .
Assuming the book object has been constructed as in the first example.
System.out.println( "Title: "+book.getTitle() ); Iterator<String> authors = book.getAuthors(); while (authors.hasNext()) { System.out.println( " Author: "+authors.next() ); } if (book.hasPageCount()) { System.out.println( " Pages: "+book.getPageCount() ); }
This will result in the following output:
Title: Java Generics and Collections Author: Maurice Naftalin Author: Philip Wadler Pages: 286