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Process XML node as Independent XML Document and update the node in Original XML document

I need process a XML node as independent XML, add a new tag to the Node Document , update the original XML document with the new node info. Any help, advice or tutorial is welcome.
This is the original XML:
<ENVOLVENTE id="ENVOLVENTE">
<FirmaEmpresa>
<FirmaDonante>
<Firma>
<Relacion>
<RelacionId>32490342093249090234</RelacionId>
</Relacion>
<Formulario>
<Donante>
<DonanteNombre>Gloria Robles</DonanteNombre>
<DonanteCorreo>gloria#gmail.com</DonanteCorreo>
</Donante>
<Beneficiado>
<BeneficiarioPais>USA</BeneficiarioPais>
<BeneficiadoCorreo>usdonations#gmail.com</BeneficiadoCorreo>
</Beneficiado>
<Fabricantes>
<Fabricante>
<FabricanteNumeroOrden>1</FabricanteNumeroOrden>
<FabricantePais>MX</FabricantePais>
<FabricanteCorreo>fabricante#gmail.com</FabricanteCorreo>
</Fabricante>
</Fabricantes>
<ListaDonaciones>
<Donaciones>
<DonacionesNumeroOrden>1</DonacionesNumeroOrden>
<DonacionesProductoId>nombre</DonacionesProductoId>
<DonacionesCantidadDonada>100</DonacionesCantidadDonada>
<DonacionesFechaDonacion>2016-12-29T12:21:16</DonacionesFechaDonacion>
</Donaciones>
</ListaDonaciones>
</Formulario>
</Firma>
</FirmaDonante>
<Empresa>
<EmpresaPais>MX</EmpresaPais>
<EmpresaNombre>Donaciones A.C </EmpresaNombre>
<EmpresaDirecccion>AV. REFORMA 1900</EmpresaDirecccion>
<EmpresaCiudad>CDXM</EmpresaCiudad>
</Empresa>
<PermisoEmpresa>
<PermisoNumero>329023409324902349023409234</PermisoNumero>
</PermisoEmpresa>
</FirmaEmpresa>
</ENVOLVENTE>
Now, i need extract the node "FirmaDonante" to a new XML DOM:
<FirmaDonante>
<Firma>
<Relacion>
<RelacionId>32490342093249090234</RelacionId>
</Relacion>
<Formulario>
<Donante>
<DonanteNombre>Gloria Robles</DonanteNombre>
<DonanteCorreo>gloria#gmail.com</DonanteCorreo>
</Donante>
<Beneficiado>
<BeneficiarioPais>USA</BeneficiarioPais>
<BeneficiadoCorreo>usdonations#gmail.com</BeneficiadoCorreo>
</Beneficiado>
<Fabricantes>
<Fabricante>
<FabricanteNumeroOrden>1</FabricanteNumeroOrden>
<FabricantePais>MX</FabricantePais>
<FabricanteCorreo>fabricante#gmail.com</FabricanteCorreo>
</Fabricante>
</Fabricantes>
<ListaDonaciones>
<Donaciones>
<DonacionesNumeroOrden>1</DonacionesNumeroOrden>
<DonacionesProductoId>nombre</DonacionesProductoId>
<DonacionesCantidadDonada>100</DonacionesCantidadDonada>
<DonacionesFechaDonacion>2016-12-29T12:21:16</DonacionesFechaDonacion>
</Donaciones>
</ListaDonaciones>
</Formulario>
</Firma>
</FirmaDonante>
After that, I will modify the node as new XML document, something like that, with a new XML Element after the original Node.
<FirmaDonante>
<Firma>
<Relacion>
<RelacionId>32490342093249090234</RelacionId>
</Relacion>
<Formulario>
<Donante>
<DonanteNombre>Gloria Robles</DonanteNombre>
<DonanteCorreo>gloria#gmail.com</DonanteCorreo>
</Donante>
<Beneficiado>
<BeneficiarioPais>USA</BeneficiarioPais>
<BeneficiadoCorreo>usdonations#gmail.com</BeneficiadoCorreo>
</Beneficiado>
<Fabricantes>
<Fabricante>
<FabricanteNumeroOrden>1</FabricanteNumeroOrden>
<FabricantePais>MX</FabricantePais>
<FabricanteCorreo>fabricante#gmail.com</FabricanteCorreo>
</Fabricante>
</Fabricantes>
<ListaDonaciones>
<Donaciones>
<DonacionesNumeroOrden>1</DonacionesNumeroOrden>
<DonacionesProductoId>nombre</DonacionesProductoId>
<DonacionesCantidadDonada>100</DonacionesCantidadDonada>
<DonacionesFechaDonacion>2016-12-29T12:21:16</DonacionesFechaDonacion>
</Donaciones>
</ListaDonaciones>
</Formulario>
</Firma>
</FirmaDonante>
<Signature>
<SignedInfo/>
<KeyInfo/>
</Signature>
Finally, i need add the Node document in the same position in the original document, as Node, with the new tag:
<ENVOLVENTE id="ENVOLVENTE">
<FirmaEmpresa>
<FirmaDonante>
<Firma>
<Relacion>
<RelacionId>32490342093249090234</RelacionId>
</Relacion>
<Formulario>
<Donante>
<DonanteNombre>Gloria Robles</DonanteNombre>
<DonanteCorreo>gloria#gmail.com</DonanteCorreo>
</Donante>
<Beneficiado>
<BeneficiarioPais>USA</BeneficiarioPais>
<BeneficiadoCorreo>usdonations#gmail.com</BeneficiadoCorreo>
</Beneficiado>
<Fabricantes>
<Fabricante>
<FabricanteNumeroOrden>1</FabricanteNumeroOrden>
<FabricantePais>MX</FabricantePais>
<FabricanteCorreo>fabricante#gmail.com</FabricanteCorreo>
</Fabricante>
</Fabricantes>
<ListaDonaciones>
<Donaciones>
<DonacionesNumeroOrden>1</DonacionesNumeroOrden>
<DonacionesProductoId>nombre</DonacionesProductoId>
<DonacionesCantidadDonada>100</DonacionesCantidadDonada>
<DonacionesFechaDonacion>2016-12-29T12:21:16</DonacionesFechaDonacion>
</Donaciones>
</ListaDonaciones>
</Formulario>
</Firma>
</FirmaDonante>
<!--NEW TAG -->
<Signature>
<SignedInfo/>
<KeyInfo/>
</Signature>
<!--NEW TAG -->
<Empresa>
<EmpresaPais>MX</EmpresaPais>
<EmpresaNombre>Donaciones A.C </EmpresaNombre>
<EmpresaDirecccion>AV. REFORMA 1900</EmpresaDirecccion>
<EmpresaCiudad>CDXM</EmpresaCiudad>
</Empresa>
<PermisoEmpresa>
<PermisoNumero>329023409324902349023409234</PermisoNumero>
</PermisoEmpresa>
</FirmaEmpresa>
</ENVOLVENTE>
actually, i can extract the Node, but i have errors when i try to add a new Element the node document:
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder builder = dbf.newDocumentBuilder();
InputStream stream = new ByteArrayInputStream(
xmlFile.getBytes(StandardCharsets.UTF_8));
Document document = builder.parse(stream);
Element elementFirmaDonante = (Element) document.getElementsByTagName("FirmaDonante").item(0);
DocumentBuilder documentBuilder = dbf.newDocumentBuilder();
Document documentoCODExporterMasEH = documentBuilder.newDocument();
Node newNode = documentoCODExporterMasEH.importNode(elementFirmaDonante, true);
documentoCODExporterMasEH.appendChild(newNode);
/*In this point all is OK, a can serialize de Document, but now, a can't add a new Item to the node document*/
/*
* This block, throws error:
* HIERARCHY_REQUEST_ERR: An attempt was made to insert a node where it is not permitted.
*/
Element anotherElement = (Element) document.getElementsByTagName("Empresa").item(0);
Node anotherNewNode = documentoCODExporterMasEH.importNode(anotherElement, true);
documentoCODExporterMasEH.insertBefore(anotherNewNode, newNode);
The above code is just to test that I can add new Elements or nodes to the DOM Object.
Any suggestions ??
Thanks in advance!!!!!

See the below code, I am able to insert a new node before Empresa node:-
Element anotherElement = (Element)document.getElementsByTagName("Empresa").item(0);
Element newTag = document.createElement("Signature");
Element childElem1=document.createElement("SignedInfo");
Element childElem2=document.createElement("KeyInfo");
newTag.appendChild(childElem1);newTag.appendChild(childElem2);
anotherElement.getParentNode().insertBefore(newTag, anotherElement);
Try to change your code like below:-
documentoCODExporterMasEH.insertBefore(newNode,anotherNewNode);

XML Merging using XPATH

I am trying to merge two xml using
"javax.xml.xpath.XPath".
Both source and destination xml looks as below mentioned.
i want to append all the nodes of "bpmn:process" in the second xml to first xml
<?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" id="Definitions_1" targetNamespace="http://bpmn.io/schema/bpmn">
<bpmn:collaboration id="Collaboration_1ah989h">
<bpmn:participant id="Participant_108if28" processRef="Process_2" />
</bpmn:collaboration>
<bpmn:process id="Process_1" isExecutable="false">**
<bpmn:startEvent id="StartEvent_1">
<bpmn:outgoing>SequenceFlow_1i0zw0x</bpmn:outgoing>
</bpmn:startEvent>
<bpmn:intermediateThrowEvent id="IntermediateThrowEvent_00epl00">
<bpmn:incoming>SequenceFlow_1i0zw0x</bpmn:incoming>
<bpmn:outgoing>SequenceFlow_05qx4z2</bpmn:outgoing>
</bpmn:intermediateThrowEvent>
</bpmn:process>
</bpmn:definitions>
Below is the code used to merge xml
Document destination= (Document) xpath.evaluate("/", new InputSource("C:/diagram_Sec.bpmn"), XPathConstants.NODE);
NodeList listPosts = (NodeList) xpath.evaluate("//bpmn:process//*",new InputSource("C:/diagram_Fir.xml"), XPathConstants.NODESET);
Element element= (Element) xpath.evaluate("//bpmn:process", destination, XPathConstants.NODE);
for (int i = 0; i < listPosts.getLength(); i++) {
Node listPost = listPosts.item(i);
Element element = (Element) listPost;
AttributeMap map = (AttributeMap) element.getAttributes();
for(int j=0;j<map.getLength();j++)
{
element.setAttribute(map.item(j).getLocalName(), map.item(j).getNodeValue());
}
Node node = xml1.adoptNode(element);
blog.appendChild(node);
}
DOMImplementationLS impl = (DOMImplementationLS) xml1.getImplementation();
System.out.println(impl.createLSSerializer().writeToString(destination ));
The problem is, this code will consider all the child nodes of "bpmn:process" tag as seperate node and will put directly under "bpmn:process"(all the sub chidren will also come under "bpmn:process"). the output looks like this
<bpmn:process id="Process_1" isExecutable="false">
//Here comes First xml nodes
//Second XML Content after merge
<bpmn:startEvent id="StartEvent_1">
</bpmn:startEvent>
**//This tag should be inside bpmn:startEvent tag**
<bpmn:outgoing>SequenceFlow_1i0zw0x</bpmn:outgoing>
<bpmn:intermediateThrowEvent id="IntermediateThrowEvent_00epl00">
</bpmn:intermediateThrowEvent>
**//THis should be inside above bpmn:intermediateThrowEvent tag**
<bpmn:incoming>SequenceFlow_1i0zw0x</bpmn:incoming>
</bpmn:process
But the Expected is
<bpmn:process id="Process_1" isExecutable="false">
//Here comes First xml Children
//Second XML Content
<bpmn:startEvent id="StartEvent_1">
// outgoing is Inside bpmn:startEvent tag
**<bpmn:outgoing>SequenceFlow_1i0zw0x</bpmn:outgoing>**
</bpmn:startEvent>
<bpmn:intermediateThrowEvent id="IntermediateThrowEvent_00epl00">
// Inside bpmn:intermediateThrowEvent tag
<bpmn:incoming>SequenceFlow_1i0zw0x</bpmn:incoming>
</bpmn:intermediateThrowEvent>
</bpmn:process
Please let me know the correct way of doing this.
Thanks,

XPath is a read-only language: you can't use it to construct new XML trees. For that you need XSLT or XQuery. Or DOM, if you really want to sink that low.
But this is so easy in XSLT that using DOM really seems a waste of effort. In XSLT you just need two template rules: the standard identity rule to copy everything unchanged, plus the rule
<xsl:template match="bpmn:process">
<xsl:copy-of select="."/>
<xsl:copy-of select="document('second.xml')//bpmn:process"/>
</xsl:template>

CreateTextNode escape characters in large text string

charactersI am trying to include the correct characters in an XML document text node:
Element request = doc.createElement("requestnode");
request.appendChild(doc.createTextNode(xml));
rootElement.appendChild(request);
The xml string is a segment of a large xml file which I have read in:
Document doc = docBuilder.newDocument();
Element rootElement = doc.createElement("rootnode");
doc.appendChild(rootElement);
<firstname>John</firstname>
<dateOfBirth>28091999</dateOfBirth>
<surname>Doe</surname>
The problem is that passing this into createTextNode is replacing some of the charters:
<firstname>John</firstname>
<dateOfBirth>28091999</dateOfBirth>
<surname>Doe</surname>
Is there any way I can keep the correct characters (< , >) in the textnode. I have read about using importnode but this is not correctly XML, only a segment of a file.
Any help would be greatly appreciated.
EDIT: I need the xml string (which is not fully formatted xml, only a segment of an external xml file) to be in the "request node" as I am building XML to be imported into SOAP UI

You can't pass the element tag and text to the createTextNode() method. You only need to pass the text. You need then to append this text node to an element.
If the source is another XML document, you must extract the text node from an element and insert it in to the other. You can grab a Node (element and text) and try to inserted as a text node in the other. That is why you are seeing all the escape characters.
On the other hand, you can insert this Node into the other XML (if the structure is allowed) and it should be just fine.
In your context, I assume "request" is some sort of Node. The child element of a Node could be another element, text, etc. You have to be very specific.
You can do something like:
Element name = doc.createElement("name");
Element dob = doc.createElement("dateOfBirth");
Element surname = doc.createElement("surname");
name.appendChild( doc.createTextNode("John") );
dob.appendChild( doc.createTextNode("28091999") );
surname.appendChild( doc.createTextNode("Doe") );
Then you can add these element to a parent node:
node.appendChild(name);
node.appendChild(dob);
node.appendChild(surname);
UPDATE: As an alternative, you can open a stream to a document and insert your XML string as a byte stream. Something like this (untested code, but close):
String xmlString = "<firstname>John</firstname><dateOfBirth>28091999</dateOfBirth><surname>Doe</surname>";
DocumentBuilderFactory fac = javax.xml.parsers.DocumentBuilderFactory.newInstance();
DocumentBuilder builder = fac.newDocumentBuilder();
Document newDoc = builder.parse(new ByteArrayInputStream(xmlString.getBytes()));
Element newElem = doc.createElement("whatever");
doc.appendChild(newElem);
Node node = doc.importNode(newDoc.getDocumentElement(), true);
newElem.appendChild(node);
Something like that should do the trick.

How to retrieve prefixed child elements using JDom

I have the following xml snippet from which I am trying to retrieve the first element using JDOM but I am getting nullpointer exception.please help me out if any one knows.
<db1:customer xmlns:db1="http://www.project1.com/db1">
<db1:customerId>22</db1:customerId>
<db1:customerName>PRASAD44</db1:customerName>
<db1:address>Chennai</db1:address>
<db1:email>pkk#gmail.com</db1:email>
<db1:lastUpdate>2014-08-01T00:00:00+05:30</db1:lastUpdate>
<db1:nameDetail>BSM_RESTeter</db1:nameDetail>
<db1:phoneBiz>9916347942</db1:phoneBiz>
<db1:phoneHome>9916347942</db1:phoneHome>
<db1:phoneMobile>944990031</db1:phoneMobile>
<db1:rating>22</db1:rating>
</db1:customer>
here is what I am doing,
SAXBuilder builder = new SAXBuilder();
File xmlFile = new File("CommonFiles/file.xml");
Document doc = (Document) builder.build(xmlFile);
Element rootNode = doc.getRootElement();
Element customerid = rootNode.getChild("sure:customerId");
System.out.println("customerid ======"+customerid);
The print statement displays null.

When dealing with XML containing namespaces, you need to use the Namespace instance that's appropriate for your document. In this case, you have:
<db1:customer xmlns:db1="http://www.project1.com/db1">
The namespace here is http://www.project1.com/db1 and the prefix is db1.
In JDOM you can creaate a reference to a namespace with:
Namespace db1 = Namespace.getNamespace("db1", "http://www.project1.com/db1");
Now, when you retrieve the content in your document, use:
Element customerid = rootNode.getChild("customerId", db1);
Note that you get content using the Namespace object, not the prefix for the element (there is no "db1:" prefix for the "customerId"

Adding a new node before the first child in dom tree

This is probably one of those easiest things to deal with but for some reason not working for me. I'm trying to add a new node after the root in dom tree.
Here's the original string:
<div class="discussionThread dt"><div class="dt_subject">2011 IS HERE!</div></div>
I'm trying to add a new node which is in the form of a string before . The final version should look like:
<div class="discussionThread dt"><div class="test">Test Val</div><div class="dt_subject">2011 IS HERE!</div></div>
As you can see, the new Test Val is being added immediately after the root div class. I've used few methods to place the node at the right place but its getting appended at the end.
Here's a sample which I referred from one of the earlier posts:
String newNode = "<div class="test">test</div>";
SAXReader reader = new SAXReader();
Document newNodeDocument = reader.read(new StringReader(newNode));
Document originalDoc = new SAXReader().read(new StringReader(content));
Element root = originalDoc.getRootElement();
Element givenNode = originalDoc.getRootElement();
givenNode.add(newNodeDocument.getRootElement());
This is resulting the node getting added at the end. I tried using insertBefore(), but didn't work out.
Any pointers will be highly appreciated.
Thanks

Why create a new Document or a new root Element? I think the shortest way is using Branch#content:
Returns the content nodes of this
branch as a backed List so that
the content of this branch may be
modified directly using the interface.
The List is backed by the Branch so
that changes to the list are reflected
in the branch and vice versa.
You just have to create the new Element and to add it to the root element through the List provided by content method (passing it the position index), this is my main:
public static void main(String[] args) throws DocumentException {
SAXReader reader = new SAXReader();
String xml = "<div class=\"discussionThread dt\"><div class=\"dt_subject\">2011 IS HERE!</div></div>";
Document document = reader.read(new StringReader(xml));
DefaultElement newElement = new DefaultElement("div");
newElement.addAttribute("class", "test");
newElement.add(new DefaultText("Test Val"));
List content = document.getRootElement().content();
if (content != null ) {
content.add(0, newElement);
}
System.out.println(document.asXML());
}
which prints out the following xml:
<div class="discussionThread dt"><div class="test">Test Val</div><div class="dt_subject">2011 IS HERE!</div></div>
In addition, you should also consider the use of xslt when you have to transform xml.

You're calling Element#add(Entity). From the Javadocs:
Adds the given Entity to this element. If the given node already has a parent defined then an IllegalAddException will be thrown.
So the new node you're adding will be added as a child of the node you're adding it to. You cannot add another node after the root node you have, because a document can have only one root node.
What you can do is create a new root node, then add the old root node and the new node as children of this new root node. Then set the root node of the document to the new root node.

Why not just create a new Document with the value you want, then append the other nodes to it?