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Editorial Team
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Asked: 2026-05-27T06:05:32+00:00

Say, I have two classes: @XmlRootElement class A { @XmlElement String propertyOfA; @XmlElement B

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Say, I have two classes:

@XmlRootElement
class A {
    @XmlElement
    String propertyOfA;
    @XmlElement
    B b;
}

class B {
    @XmlElement
    String propertyOfB;
}

JAXB returns an XML formatted in the according way:

<a>
  <propertyOfA>valueA</propertyOfA>
  <b>
    <propertyOfB>valueB</propertyOfB>
  </b>
</a>

My question is how to flatten the hierarchy in the XML? So that I have:

<a>
  <propertyOfA>valueA</propertyOfA>
  <propertyOfB>valueB</propertyOfB>
</a>

Can this be done with annotations?

At the moment I am thinking to create a kind of wrapper class for A, that would have fields built the way I want to see them in the XML. Is there a better way?

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1 Answer

  1. Editorial Team

    Note: I’m the EclipseLink JAXB (MOXy) lead and a member of the JAXB 2 (JSR-222) expert group.

    You could use MOXy’s @XmlPath extension to map this use case:

    import java.xml.bind.annotation.*;
import org.eclipse.persistence.oxm.annotations.XmlPath;

@XmlRootElement
class A {
    @XmlElement
    String propertyOfA;

    @XmlPath(".")
    B b;
}

    For More Information

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