Dozer mapping compex types from JAXB to POJO

I have a DTO on my end as below

public class PassengersDto {

private List<InfantDto> infant;
private List<PassengerDto> passenger;

..getters
..setters
}

However on JAXB end I have

public class PassengerListType {

    @XmlElements({
        @XmlElement(name = "Infant", type = InfantType.class),
        @XmlElement(name = "Passenger", type = PassengerType.class)
    })
    protected List<Object> passengerOrInfant;

..getter
...setter
}

I have been hitting my head with how to map from PassengerListType to PassengerDto considering that the object in list can either be InfantDto / InfantType or PassengerDto / PassengerType

I did the following mapping but this also maps infant even when its not present

<field>
            <a>passengers.passengerOrInfant</a>
            <b>passengers.passenger</b>
            <a-hint>com.xxx.PassengerListType</a-hint>
            <b-hint>com.xxx.PassengerDto</b-hint>
        </field>
        <field>
            <a>passengers.passengerOrInfant</a>
            <b>passengers.infant</b>
            <a-hint>com.xxx.PassengerListType</a-hint>
            <b-hint>com.xxx.InfantDto</b-hint>
        </field>

Do we have any provision in Dozer to check the source object type and accordingly map to respective target object??

In this case how do I check whether the object getting mapped is of Passenger or Infant Type