Add element on xml document with dom4j

Question

I currently developing a call to a SOAP Web services, an I need to be able to add elements in my XML document dynamically. I try to use for this the dom4j library, which works well in others cases, but I can't arrive to do it with my current XML document.

My goal is to add some <fieldsToNull>fieldname</fieldsToNull> elements under the <urn:sObjects> node. It seems quite simple said like this but I think I sadly have an issue in working with XML

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:partner.soap.sforce.com" xmlns:urn1="urn:sobject.enterprise.soap.sforce.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Header>
    <urn:SessionHeader>
    <urn:sessionId>sessionId</urn:sessionId>
    </urn:SessionHeader><urn:AssignmentRuleHeader>
    <urn:assignmentRuleId/><urn:useDefaultRule>1</urn:useDefaultRule></urn:AssignmentRuleHeader>
</soapenv:Header>
<soapenv:Body>
    <urn:update>
        <urn:sObjects>
            <type>Account</type>
            <Id/>
            <Name/>
        </urn:sObjects>
    </urn:update>
</soapenv:Body>

Here my last attempt according to answers I found on some topics. It doesn't generate erros but don't work :

org.dom4j.Document msgDocument = ((routines.system.Document)input_row.Body).getDocument();
org.dom4j.Element root = msgDocument.getRootElement();
String xpathExpression = "Enveloppe.Body.update.Objects";
List<Node> nodes = root.selectNodes(xpathExpression);

for (Node node : nodes) {
    Element e = (Element) node;
    e.addElement("fieldsToNull").addText("Name");
}

routines.system.Document newMsgDocument = new routines.system.Document();
newMsgDocument.setDocument(msgDocument);
output_row.Body = newMsgDocument;

Did anyone can give my a hint on how to do it ?

Precision : my code will be set in a Talend job. It doesn't change the way it should work but just to say it.

François · Accepted Answer · 2017-11-26 17:32:40Z

After more investigation I'm finally able to do what I wanted with the following code :

org.dom4j.Document msgDocument = ((routines.system.Document)input_row.Body).getDocument();

Map uris = new HashMap();
uris.put("soapenv", "http://schemas.xmlsoap.org/soap/envelope/");
uris.put("urn", "urn:partner.soap.sforce.com");

XPath xpath = msgDocument.createXPath("//soapenv:Body/urn:update/urn:sObjects");
xpath.setNamespaceURIs(uris);
List<Node> nodes = xpath.selectNodes(msgDocument);

for (Node node : nodes) {
    Element e = (Element) node;
    Element fieldsToNull = e.addElement("fieldsToNull");
    fieldsToNull.setText("Name");
    System.out.println(fieldsToNull.toString());
}

routines.system.Document newMsgDocument = new routines.system.Document();
newMsgDocument.setDocument(msgDocument);
output_row.Body = newMsgDocument;

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