Why is Dozer is not calling my custom converter for a class

[Swaranga Sarma]

I am trying to configure a custom converter for mapping between two types. I want to stick to the programmatic API and not resort to XML. But it seems Dozer is not calling my custom converter. Here is a small unit test that reproduces the problem:

@Test
public void test() {
    DozerBeanMapper mapper = new DozerBeanMapper();
    mapper.setCustomConverters(singletonList(new ABConverter()));

    A a = new A("001");

    B b = mapper.map(a, B.class);

    System.out.println("b = " + b);
}

public static class ABConverter extends DozerConverter<A, B> {
    public ABConverter() {
        super(A.class, B.class);
    }

    @Override
    public B convertTo(A source, B destination) {
        return new B(source.val1);
    }

    @Override
    public A convertFrom(B source, A destination) {
        return new A(source.val2);
    }
}

@Data
@NoArgsConstructor
@AllArgsConstructor
public static class A {
    private String val1;
}

@Data
@NoArgsConstructor
@AllArgsConstructor
public static class B {
    private String val2;
}

The above code prints b = B(val2=null). I also added print statements in the converter and verified the methods are not being called.

Looking at the setCustomConverters method, I expected that my custom converter will be called but that is not the case. I am using Dozer 5.4.0