org.hibernate.PropertyNotFoundException: no appropriate constructor in class

public TestForm(String a, String b, String d) {
        this.a = a;
        this.b = b;
        this.d = d;
    }

        ...
        CriteriaQuery<TestForm> c = cb.createQuery(TestForm.class);
        Root<TestEntity> r = c.from(TestEntity.class);
        c.multiselect(r.get("name"), cb.nullLiteral(String.class), r.get("name"));
        ....