Can spring @Autowired Map?

by

You can create an automatically initialized map with keys of your choice using Spring Java configuration:

In class annotated with @Configuration annotation:

@Autowired
private List<ISendableConverter> sendableConverters;

@Bean
public Map<String, ISendableConverter> sendableConvertersMap() {
    Map<String, ISendableConverter> sendableConvertersMap = new HashMap<>();
    for (ISendableConverter converter : sendableConverters) {
        sendableConvertersMap.put(converter.getType(), converter);
    }
    return sendableConvertersMap;
}

Than you inject this map with:

@Resource()
private Map<String, ISendableConverter> sendableConverters;

You can optionally add some selector string to your @Resource annotation if you have defined more maps of the same type.

This way all you have to do is implement ISendableConverter by your spring bean and it will automatically appear in Map defined above.
You don’t need to create map items by hand for each implementation.

More Related Contents:

  1. Why is my Spring @Autowired field null?
  2. Understanding Spring @Autowired usage
  3. Can you use @Autowired with static fields?
  4. Spring: @Component versus @Bean
  5. How does autowiring work in Spring?
  6. @Resource vs @Autowired
  7. @Autowired bean is null when referenced in the constructor of another bean
  8. What is the difference between @Inject and @Autowired in Spring Framework? Which one to use under what condition?
  9. Spring Autowiring class vs. interface?
  10. Understanding spring @Configuration class
  11. How to Autowire Bean of generic type in Spring?
  12. Autowiring two beans implementing same interface – how to set default bean to autowire?
  13. Autowired Environment is null
  14. Inject bean into enum
  15. Using Spring 3 autowire in a standalone Java application
  16. @Autowired and static method
  17. intellij incorrectly saying no beans of type found for autowired repository
  18. Injecting @Autowired private field during testing
  19. Spring @Autowired on a class new instance
  20. How to fix role in Spring Security?
  21. Spring Boot how to hide passwords in properties file
  22. Spring MVC – How to return simple String as JSON in Rest Controller
  23. Circular dependency in Spring
  24. How do I populate a drop down with a list using thymeleaf and spring
  25. Cannot find the declaration of element ‘beans’
  26. Spring MVC using tomcat, maven and intelliJ Error [duplicate]
  27. Iterating through a List Object in JSP
  28. Spring Boot – Limit on number of connections created
  29. Autowiring in JsonDeserializer: SpringBeanAutowiringSupport vs HandlerInstantiator
  30. TransactionRequiredException Executing an update/delete query

Leave a Comment