条件推土机xml映射

Question

In an object, i have two properties A and B. I want to map these properties based on condition to the target property T. I'm using xml based dozer mapping -

if(A != null)
  <field>
        <a>A</a>
        <b>T</b>
    </field>
else if (B != null)
   <field>
        <a>B</a>
        <b>T</b>
    </field>

How to achieve this in xml ?

Answer 1

If A and B are the only mapped properties and A and B can't be not null at the same time you can try to exclude mapping of null values:

<mapping map-null="false">
    <class-a>SrcClass</class-a>
    <class-b>DestClass</class-b>
    <field>
       <a>A</a>
       <b>T</b>
    </field>   
    <field>
       <a>B</a>
       <b>T</b>
    </field>
</mapping>

See also Exclude Mapping Null Values