Exclude null value issues in dozer hint

[gaurav jain]

I am  mapping the inherited class of source class to another inherited classes of destination using hint in dozer mapping file .But i am getting the null values as well during the mapping.I want to exlcude the  properties having the null values . I have used map-null="false" map-empty-string="false" at class level as well as mapping level but nothing is getting impacted.Kindly look in to it asap.

<?xml version="1.0" encoding="UTF-8"?>
<mappings xmlns="http://dozer.sourceforge.net"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://dozer.sourceforge.net
          http://dozer.sourceforge.net/schema/beanmapping.xsd">



    <mapping  map-null="false" map-empty-string="false" wildcard="false">
        <class-a m ><source class></class-a>
        <class-b  map-null="false" map-empty-string="false" ><destination class></class-b>
        <field>
            <a><source base property> </a>
            <b><destination base property></b>
            <a-hint>
                <source child class 1 extending super class of source base property>,

                <source child class 2 extending super class of source base property>,

                :

                :

                <source child class n extending super class of source base property>,

            </a-hint>
            <b-hint>
                < destination child class 1 extending super class of destination base property>,
                < destination child class 2 extending super class of destination base property>,
                :
                :
                < destination child class n extending super class of destination base property>,

            </b-hint>
        </field>
       
    </mapping>
</mappings>

I have some fields in the destination subclasses which are set as null.I want to exclude the properties having null values.

Thanks