jaxb adding namespace to element - web-services

Question

According to my task I have to invoke SOAP service. So, I have generated java classes from wsdl using xjc. But I have a problem invoking SOAP service. My application generates this request:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"/><soap:Body>
<typ:SendMessage xmlns:ns4="http://test.user.kz/UserInfo" xmlns:q1="http://test.user.kz/CustomerInfo" xmlns:typ="http://test.user.kz/MyChannel/v1/Types">
<request>
<requestInfo>
<messageId>26e96b11-8f82-421e-829a</messageId>
</requestInfo>
<requestData>
<data xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="q1:PaymentPackageRequestType">
<q1:methodName>testMethod</q1:methodName>
</data>
</requestData>
</request>
</typ:SendMessage></soap:Body></soap:Envelope>
But I need in my SOAP request I need to specify namespace in data tag, lik this:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"/><soap:Body>
<typ:SendMessage xmlns:ns4="http://test.user.kz/UserInfo" xmlns:q1="http://test.user.kz/CustomerInfo" xmlns:typ="http://test.user.kz/MyChannel/v1/Types">
<request>
<requestInfo>
<messageId>26e96b11-8f82-421e-829a</messageId>
</requestInfo>
<requestData>
<data xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="q1:PaymentPackageRequestType" **xmlns:q1="http://payments.bee.kz/PaymentPackage"**>
<q1:methodName>testMethod</q1:methodName>
</data>
</requestData>
</request>
</typ:SendMessage></soap:Body></soap:Envelope>
Otherwise target SOAP service gives me error:
XML namespace prefix 'q1' is not defined.
How it possible to specify namespace in data tag?
This is my current package-info:
#javax.xml.bind.annotation.XmlSchema(
xmlns = {
#javax.xml.bind.annotation.XmlNs(prefix = "typ",
namespaceURI = "http://test.user.kz/MyChannel/v1/Types"),
#javax.xml.bind.annotation.XmlNs(prefix = "q1",
namespaceURI = "http://test.user.kz/CustomerInfo")
},
elementFormDefault = javax.xml.bind.annotation.XmlNsForm.UNQUALIFIED,
attributeFormDefault = javax.xml.bind.annotation.XmlNsForm.UNSET
)
package kz.uni.gen;
So I couldn't add namespace xmlns:q1="http://test.user.kz/CustomerInfo" to data tag in SOAP request. How can I add this namespace declaration or move namespace declaration from SendMessage tag?

Answer 1

so using JAXB it is not possible. Therefore I am manually added namespace in required element. This is full snippet:
Document document = null;
try {
document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
Marshaller marshaller = JAXBContext.newInstance(SendMessage.class).createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.setProperty("com.sun.xml.bind.characterEscapeHandler", new CharacterEscapeHandler() {
#Override
public void escape(char[] buf, int start, int len, boolean b, Writer out) throws IOException {
out.write(buf, start, len);
}
});
QName name = new QName(NAMESPACE_URI, SendMessage.class.getSimpleName());
JAXBElement<SendMessage> root = new JAXBElement<SendMessage>(name, SendMessage.class, from);
StringWriter writer1 = new StringWriter();
marshaller.marshal(root, writer1);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
Element node = dbf
.newDocumentBuilder()
.parse(new ByteArrayInputStream(writer1.toString().getBytes(StandardCharsets.ISO_8859_1)))
.getDocumentElement();
Attr attr1 = document.createAttribute("xmlns:q1");
attr1.setValue("http://test.user.kz/CustomerInfo");
node.getElementsByTagName("data").item(0).getAttributes().setNamedItem(node.getOwnerDocument().importNode(attr1, true));
return node;
} catch (Exception e) {
throw new Exception("Unable to transform POJO to XML SOAP message ", e);
}