EndUsage.java

public class EndUsage {
    
    @Inject
    private MyBean myBean; 
    
    // Use the dynamic bean
}

MyBean.java

@Alternative // This is not the one we want injected
public class MyBean {
 // Add implementation here            
             
}             

MyBeanProducer.java

public class MyBeanProducer {
    private MyBean bean;
    
    @Produces
    public MyBean myBeanProducer() {
        return bean;
    }  
    
    @PostConstruct
    private void determineBean() {
        bean = new MyBean();   // This could be any logic you want. MyBean could be the interface and here you could choose the implemtation              
    }
}