I have a bunch of repository beans that implement type Repository<T extends Node>. Now I can get a list of random nodes from the user and I want to get the appropriate repository for each node. Since Spring 4.0RC1 we can autowire repositories like this:
@Autowired Repository<SomeNode> someNodeRepository;
As documented here.
This works fine, but my question is how I can do this dynamically based on the generic type.
What I want to do is something like:
public <T extends Node> T saveNode(T node) {
Repository<T> repository = ctx.getBean(Repository.class, node.getClass());
return repository.save(node);
}
Where the second parameter is the generic type. This of course does not work, although it compiles.
I can't find any/the documentation on this.
You can do something like this:
String[] beanNamesForType = ctx.getBeanNamesForType(ResolvableType.forClassWithGenerics(Repository.class, node.getClass()));
// If you expect several beans of the same generic type then extract them as you wish. Otherwise, just take the first
Repository<T> repository = (Repository<T>) ctx.getBean(beanNamesForType[0]);