Hi Julius,
You could set up an object model like the following to handle your
XML message:
Root
You will need an object to correspond to the repeating XML element
called "Element".
import java.util.List;
import javax.xml.bind.annotation.*;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
@XmlElementWrapper(name="ListOfElements")
@XmlElement(name="Element")
private List<Element> listOfElements;
}
Element
The Element class will hold onto 2 properties one of type
ElementOfTypeA and another of ElementOfTypeB. Since JAXB by default
won't marshal a null value, you will get the output you are looking
for.
import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class Element {
@XmlElement(name="ElementOfTypeA")
private ElementOfTypeA elementOfTypeA;
@XmlElement(name="ElementOfTypeB")
private ElementOfTypeB elementOfTypeB;
}
-Blaise
On 13-10-18 7:44 AM, Julius Schwartzenberg wrote:
Hi,
I have a need to produce XML according to the following format:
<root>
<ListOfElements>
<Element>
<ElementOfTypeA>
</ElementOfTypeA>
</Element>
<Element>
<ElementOfTypeA>
</ElementOfTypeA>
</Element>
<Element>
<ElementOfTypeB>
</ElementOfTypeB>
</Element>
<Element>
<ElementOfTypeB>
</ElementOfTypeB>
</Element>
</ListOfElements>
</root>
ElementOfTypeA and ElementOfTypeB are based on different Java
classes. The extra 'Element' elements do not make any sense, but I
have to generate them like that.
I tried multiple combinations where I either provided
ElementOfTypeA and ElementOfTypeB from my Java model through
different List attributes or with a combined list using a
superclass.
In the first case, I used these formats:
<xml-elements java-attribute="listWithElementsOfTypeA">
<xml-element-wrapper name="ListOfElements/Element/" />
</xml-elements>
and:
<xml-element java-attribute="listWithElementsOfTypeA"
name="ElementOfTypeA">
<xml-element-wrapper name="ListOfElements/Element" />
</xml-element>
and also:
<xml-element java-attribute="listWithElementsOfTypeA"
name="Element/ElementOfTypeA">
<xml-element-wrapper name="ListOfElements" />
</xml-element>
But MOXy combines the 'Element' elements and I end up with this:
<root>
<ListOfElements>
<Element>
<ElementOfTypeA>
</ElementOfTypeA>
<ElementOfTypeA>
</ElementOfTypeA>
<ElementOfTypeB>
</ElementOfTypeB>
<ElementOfTypeB>
</ElementOfTypeB>
</Element>
</ListOfElements>
</root>
In the second case, MOXy added an xsi-type attribute to the
Element elements. I used this then:
<xml-elements java-attribute="elementKoppelingen">
<xml-element type=ElementOfTypeA name=Element />
<xml-element type=ElementOfTypeB name=Element />
<xml-element-wrapper name="ListOfElements" />
</xml-elements>
How can I prevent MOXy from combining my Element elements?
Thanks a lot in advance,
Julius
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