How can I custom spring validation message at runtime?

Question

@Data
public class TestData {

    private Integer x;
    private Integer y;

    @AssertTrue
    public boolean isValid() {
        String message;

        if (x > y) {
            message = "message1..."; // here
            return false;
        }
        else if (x < y) {
            message = "messsage2..." // and here
            return false;
        }
        else {
            return true;
        }
    }

}

I know it's possible to set the message in the @AssertTrue annotation (@AssertTrue(message = "default messsage")), but I wonder if there is a way to dynamically set the message at runtime.