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  /*
   * JBoss, Home of Professional Open Source
   * Copyright 2010, Red Hat, Inc., and individual contributors
   * by the @authors tag. See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
  * http://www.apache.org/licenses/LICENSE-2.0
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package javax.enterprise.inject;
 
 import static java.lang.annotation.ElementType.FIELD;
 import static java.lang.annotation.ElementType.METHOD;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 

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 EJB 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 &.064;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 &.064;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, 

Author(s):
Gavin King
Pete Muir
See also:
javax.enterprise.inject.Disposes &.064;Disposes
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.

public @interface Produces {
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