jaxb, separate namespace for child element

Question

I am trying to create XML using jaxb like below format, where child element has separate name space.

 <soap:Envelope xmlns:soap="http://demo.org/soap/envelope/"      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
      <soap:Header>
           <element1 xmlns="http://childnamespacehere">
          <att1>test</att1>
          <att2>test</att2>
          </element1>       
     </soap:Header>
     <soap:Body>
         <element2 xmlns="http://childnamespacehere">
            <att1>test</att1>
            <att2>test</att2>
        </element2 >
    </soap:Body>
</soap:Envelope>

my class

  @XmlRootElement(name = "soap:Envelope", namespace = "http://schemas.xmlsoap.org/soap/envelope/")
  public class Envelope     

    private Element1 element1;   

    private Element2  element2;

    @XmlElementWrapper(name = "soap:Header")
    @XmlElement(name = "Element1", namespace = "http://childelementnamespace/")
    public void setElement1(Element1 element){ }

    @XmlElementWrapper(name = "soap:Body")
    @XmlElement(name = "Element2" , namespace = "http://childelementnamespace/")
    public void setElement2(Element2 element){ }

but i am getting xml generated like below, where child schema is at root level.

 <soap:Envelope xsi:schemaLocation="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns2="http://childelementnamespace/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        <soap:Header>
            <ns2:Element1>
                <att1>value</att1>
                <att2>value</att2>
            </ns2:Element1>
        </soap:Header>
        <soap:Body>
            <ns2:Element2>
                 <att1>value</att1>
                <att2>value</att2>
            </ns2:Element2>
        </soap:Body>
    </soap:Envelope>

i have @xmlschema defined in package-info.java

 @XmlSchema(namespace = "http://schemas.xmlsoap.org/soap/envelope/",
    xmlns = { @javax.xml.bind.annotation.XmlNs(prefix = "Element1", namespaceURI = "http://childelementnamespace"),
            @javax.xml.bind.annotation.XmlNs(prefix = "Element2", namespaceURI = "http://childelementnamespace") },
            elementFormDefault = XmlNsForm.QUALIFIED)

    package com.model;

    import javax.xml.bind.annotation.XmlNsForm;
    import javax.xml.bind.annotation.XmlSchema;

when i generate xml , name space for child elements are not getting generated , i only get namespace for root element.

Answer 1

i have solved by adding "xmlns" attribute to objects (childnode) Element1 and Element2.

  class Elemenet1

  @XmlAttribute(name="xmlns")
  String xmlns = "http://childnamespacehere";

  public void setXmlns(String namespace){};

  public String getXmlns(){};

Output

<soap:Envelope xmlns:soap="http://demo.org/soap/envelope/"      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
      <soap:Header>
           <element1 xmlns="http://childnamespacehere">
          <att1>test</att1>
          <att2>test</att2>
          </element1>       
     </soap:Header>
     <soap:Body>
         <element2 xmlns="http://childnamespacehere">
            <att1>test</att1>
            <att2>test</att2>
        </element2 >
    </soap:Body>
</soap:Envelope>