CODEWITHSUNDEEP
javajaxb
amol ghonge
amol ghonge

Reputation: 73

jaxb marshalling skip empty elements

Using JAXB is it possible to ensure that null values are not marshalled as () empty elements. For instance

public class Contacts {
    @XmlElement(name = "Phone")
    protected List<Phone> phone;
    }

currently if one of the phone element is null i get 

<contact>
         </phone>
         <phone>
                <areacode>919</areacode>
                <phonenumber>6785432</phonenumber>
         </phone>
    </contact>

i want the following output

<contact>
            <phone>
                   <areacode>919</areacode>
                   <phonenumber>6785432</phonenumber>
            </phone>
   </contact>

Upvotes: 7

Views: 10595

Answers (1)

Ilya
Ilya

Reputation: 29703

Null values are not marshaled as empty element by default.
Only empty values are marshalled as empty element

In your example you are using collection with empty Phone object element. You have two elements in list: empty Phone (all fields are null) and Phone object with not null fields.
So, 

public class Contacts {
    @XmlElement(name = "Phone")
    protected List<Phone> phone = Arrays.asList(new Phone[]{null, null, null});
}

will be marshalled to 

<contact/>

but 

public class Contacts {
    @XmlElement(name = "Phone")
    protected List<Phone> phone = Arrays.asList(new Phone[]{new Phone(), new Phone(), null});
}

will be marshalled to 

<contact>   
    <Phone/>  
    <Phone/>  
</contact>

Upvotes: 4

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