How to merge n DOM trees into a new DOM tree? 1

[BTCMan]

Hi people,

I have a List object with "n" different DOM trees (each element of the List object has a Document object).
I want to create a new DOM tree object and insert in it each one of the "n" DOM trees I have in the saved List. So the final result will be a single DOM.
Any hint of code to perform this merge? Thanks in advance. Cheers,

BTCMan

 

[Diancecht]

A good place to start:

http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/Document.html#importNode

Cheers,
Dian

 

[BTCMan]

I solved this issue. Code below for reference:

Initial state:
operDom -> Document object with a DOM tree
-------------------------------------------
public Document appendDoms(Document operDom) {
Document joinDom = null;

// Creates a new DOM tree to hold the join result
joinDom = createDom();

if (joinDom == null) {
return null;
}

// Creates a root Element Tag for the new DOM tree
org.w3c.dom.Element root = (org.w3c.dom.Element) joinDom.createElement("JoinRoot");
joinDom.appendChild(root);

//append in the new DOM the operDOM object
appendNode(operDom, joinDom);

return joinDom;
}


// Auxiliary methods:
public Document createDom () {
Document doc = null;
DocumentBuilder docBuilder = null;

try
{
DocumentBuilderFactory docBuildFactory = DocumentBuilderFactory.newInstance();
docBuildFactory.setValidating(false);
docBuilder = docBuildFactory.newDocumentBuilder();
doc = docBuilder.newDocument();
}
catch (ParserConfigurationException e1) {
return null;
}
return doc;
}


public void appendNode(Document doc1, Document doc2) {
// Gets the root Element for doc1
org.w3c.dom.Element root1 = doc1.getDocumentElement();

Node importedNode = doc2.importNode(root1, true);

// Gets the root Element for doc2 and adds in
// doc2's root Element the doc1's child
org.w3c.dom.Element root2 = doc2.getDocumentElement();
root2.appendChild(importedNode);
}