Closed
Description
Alexandre Navarro opened SPR-13585 and commented
Impossible to inject a Generic type (like List<String>) to create a @Bean via an argument of the method even though with using @Named.
A full example to describe the problem:
@Configuration
public class AppConfiguration {
private static final Logger LOGGER = LoggerFactory.getLogger(AppConfiguration.class);
@Bean
public Map<String, String> map() {
Map<String, String> map = new HashMap<>();
for (int i = 0; i < 10; i++) {
map.put("" + i, "" + i);
}
return map;
}
// Does not work, inject does not work for a generic type
// Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [java.lang.String] found for dependency [map with value type java.lang.String]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Named(value=map)}
@Bean
public List<String> list2( @Named("map") Map<String, String> map) {
return new ArrayList<>(map.values());
}
// Work
@Resource(name = "map")
private Map<String, String> map;
// Work
@Bean
public List<String> list() {
return new ArrayList<>(this.map.values());
}
/**
* <p>main.</p>
*
* @param args
*/
public static void main(String[] args) {
final ApplicationContext context =
new AnnotationConfigApplicationContext(AppConfiguration.class);
final Map<String, String> map = (Map<String, String>) context.getBean("map");
LOGGER.info("map={}", map);
final List<String> list = (List<String>) context.getBean("list");
LOGGER.info("list={}", list);
// final List<String> list2 = (List<String>) context.getBean("list2");
// LOGGER.info("list2={}", list2);
}
}For me, it should work. Tell if I did something wrong or if it exists a work around just via annotation on arguments of a @Bean method (I don't want to use Wrapper class of a GenericType or @Resource the bean wanted in a field in the Configuration file like in the example).
Affects: 4.2.2
Issue Links:
- Make spring support like CDI @Produces (for Array/Map/Collection inject) [SPR-11269] #15894 Make spring support like CDI
@Produces(for Array/Map/Collection inject) ("is duplicated by") - Allow for normal bean wiring semantics for types assignable to Map [SPR-7915] #12570 Allow for normal bean wiring semantics for types assignable to Map
- @Autowired does not work for target bean of type Collection [SPR-12180] #16794
@Autowireddoes not work for target bean of type Collection
Referenced from: commits 4a0fa69