Qualifier error. no method found annotated with @named#value

Qualifier Error: No Method Found Annotated with @Named(value)

In Java, the @Named annotation is used to provide a name to a bean or a resource. It is commonly used in dependency injection frameworks like Spring or CDI (Contexts and Dependency Injection).

The error message “No method found annotated with @Named(value)” typically occurs when the specified named value in the @Named annotation is not found.

To better understand this error, let’s consider an example:

  
    // An interface with a method annotated with @Named
    public interface MyInterface {
        @Named("myMethod")
        void myMethod();
    }
    
    // A class implementing the interface
    public class MyClass implements MyInterface {
        @Override
        public void myMethod() {
            // Implementation code here
        }
    }
    
    // Main class
    public class Main {
        public static void main(String[] args) {
            // Creating an instance of MyClass
            MyClass myClass = new MyClass();
            
            // Obtaining the method annotated with @Named("myMethod")
            Method method = null;
            for (Method m : MyClass.class.getMethods()) {
                Named namedAnnotation = m.getAnnotation(Named.class);
                if (namedAnnotation != null && namedAnnotation.value().equals("myMethod")) {
                    method = m;
                    break;
                }
            }
            
            // Checking if the method is found
            if (method != null) {
                System.out.println("Method found: " + method.getName());
            } else {
                System.out.println("Method with @Named(\"myMethod\") not found!");
            }
        }
    }
  
  

In the above example, we have an interface MyInterface with a method myMethod() annotated with @Named(“myMethod”). The class MyClass implements this interface and provides the implementation for the method.

In the Main class, we use reflection to iterate through the methods of MyClass and find the method annotated with @Named(“myMethod”). If the method is found, we print a success message; otherwise, we print an error message.

In this case, if you run the Main class, it will print “Method found: myMethod”, indicating that the method with the specified @Named value is present in MyClass. If the method were not found or the value in @Named doesn’t match, it would print “Method with @Named(“myMethod”) not found!”

Make sure you check the annotation usage and the corresponding value to avoid this error.