@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) @Documented public @interface Produces
Identifies a producer method or field. May be applied to a method or field of a bean class.
A producer method must be a non-abstract method of a managed bean class or session bean class. A producer method may be either static or non-static. If the bean is a session bean, the producer method must be either a business method of the Jakarta Enterprise Bean or a static method of the bean class.
public class Shop { @Produces @ApplicationScoped @Catalog @Named("catalog") List<Product> getProducts() { ... } ... }
A producer field must be a field of a managed bean class or session bean class. A producer field may be either static or non-static. If the bean is a session bean, the producer field must be a static field of the bean class.
public class Shop { @Produces @ApplicationScoped @Catalog @Named("catalog") List<Product> products = ...; ... }
If a producer method sometimes returns a null value, or if a producer field sometimes contains a null value when accessed,
then the producer method or field must have scope @Dependent
.
A producer method return type or producer field type may not be a type variable.
If the producer method return type or producer field type is a parameterized type, it must specify an actual type parameter or type variable for each type parameter.
If the producer method return type or producer field type is a parameterized type with a type variable, it must have scope
@Dependent
.
A producer method may have any number of parameters. All producer method parameters are injection points.
public class OrderFactory { @Produces @ConversationScoped public Order createCurrentOrder(Shop shop, @Selected Product product) { Order order = new Order(product, shop); return order; } }
A bean may declare multiple producer methods or fields.
Producer methods and fields are not inherited by bean subclasses.
Interceptors and decorators may not declare producer methods or fields.
@Disposes
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