如何使用 Dozer 将数组映射到复杂类型

Question

I am using Dozer to map some beans, and I have a mapping that I can't figure out.

Here are my classes:

class A{
    private ComplexeType type;
    //Constructors & getters    
}

class B{
    private String[] type;
    //Constructors & getters 
}

class ComplexteType{
     private List<String> list;
    //Getter for the list, no constructor
}

How do I map class A to class B?

I want to map the field type of class A to the field type of the class B using xml.

here is the xml file:

<mapping>
        <class-a>A</class-a>
        <class-b>B</class-b>
        <field custom-converter="AToBCustomConverter">
            <a>type</a>
            <b>type</b>
        </field>
    </mapping>

And here is a sippet from my CustomConverter

if (source == null) {
            return null;
        }
        B dest = null;
        if (source instanceof java.lang.String) {
            // check to see if the object already exists
            if (destination == null) {
                dest = new A();
            } else {
                dest = (A) destination;
            }
            dest.getTypes().add((String) source);
            return dest;
        } else if (source instanceof B) {
            String[] sourceObj = ((B) destination)
                    .getType()
                    .toArray(
                            new String[((B) destination)
                                    .getType().size()]);
            return sourceObj;
        } else {
            throw new MappingException(
                    "Converter StatResultCustomConverter used incorrectly. Arguments passed in were:"
                            + destination + " and " + source);
        }
    }

Answer 1

I don't think your CustomConverter is necessary in this case, see here .

Try this in your mapping file:

<mapping>
  <class-a>A</class-a>
  <class-b>B</class-b>
  <field>
    <a>type.list</a>
    <b>type</b>
  </field>
</mapping>

and Dozer should perform the nested mapping automatically.

Answer 2

Here is the mapping I used to solve the problem.

<mapping>
  <class-a>Q</class-a>
  <class-b>B</class-b>   
  <field>
    <a is-accessible="true">type<list</a>
    <b is-accessible="true">type</b>
  </field>
</mapping>