Class A {
    List<AA> listAA;
    // get set methods...
}

Class B{
    C objectC = new C();
    // get set methods...
}

Class C{
    List<CC> listCC;
    // get set methods...
}

Class AA{
    String aa;
    // get set methods...
}

Class CC{
     String cc;
    // get set methods...
}

a.listAA -> b.c.listCC

<mappings>
    <mapping>
        <class-a>mypackages.A</class-a>
        <class-b>mypackages.B</class-b>
        <field>
            <a>listA</a>
            <b>objectC.listC</b>
            <b-hint>mypackages.CC</b-hint>
        <field>
    </mapping>

    <mapping>
        <class-a>mypackages.AA</class-a>
        <class-b>mypackages.CC</class-b>
        <field>
            <a>aa</a>
            <b>cc</b>
        <field>
    </mapping>
</mappings>

objectC.listC

NullPointerException
    at org.dozer.util.ReflectionsUtils.invoke(ReflectionsUtils)
    ...