I try to work with @Injection, so start with a simple example here :
Interface
public interface NumberGenerator {
String generateNumber();
}
BookService
public class BookServices {
@Inject
@ThirteenNumber
private NumberGenerator generator;
public Book createBook(String title){
return new Book(title, generator.generateNumber());
}
}
Book Object
public class Book {
private String title;
private String isbn;
public Book() {
}
public Book(String title, String isbn) {
this.title = title;
this.isbn = isbn;
}
//getters and setters
}
CDI
@Named(value = "injectionTest")
@ViewScoped
public class InjectionTest implements Serializable {
public void showResult() {
BookServices bookService = new BookServices();
Book book = bookService.createBook("Java book");
System.out.println(book.toString());
}
//...
}
ThirteenNumber Implementation
@ThirteenNumber
public class IsbnGenerator implements NumberGenerator{
@Override
public String generateNumber(){
return "13-84333-" + Math.abs(new Random().nextInt());
}
}
Problem
When i try to call bookService.createBook("Java book") it throw a java.lang.NullPointerException, in generator.generateNumber() i think it not call the right @Qualifier, a tried to solve this problem, using this link, Java EE 7 CDI - Injection doesn't work, sending NullPointerException i add all the dependencies but the problem still the same?
Did i miss something?
Note i know about What is a NullPointerException, and how do I fix it?
Thank you.
