sorting XML to another XML file

[Francesco Marchioni]

Hi all,
I need to sort an XML document depending on the value of some attributes inside it.
I decided to :

1) iterate through the XML
2) save the XML Nodes I'm interested with in a Vector
3) order Nodes in the vector
3) create a new XML using nodes from the Vector.

The problem is, once I import & append nodes in the new XML I get an error

org.w3c.dom.DOMException: WRONG_DOCUMENT_ERR: A node is used in a different document than the one that created it.

The code I use to re-create the XML is the following:

  
 
// Note: vecNodes holds the Nodes from the first Document
 
public void buildNewXML() {
    Document doc = null;
    DocumentBuilder builder = null;
    try {
              builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
              doc = builder.newDocument();
              
              Element firstRoot = doc.createElement("root");
              doc.appendChild(firstRoot);
            
              for (int ii=0;ii< vecNodes.size();ii++) { 
                Node node = (Node)vecNodes.get(ii);
                doc.importNode(node,true);
                firstRoot .getDocumentElement().appendChild(node);
              }
          } catch (Exception e) {
            e.printStackTrace();
          }
        
  
  }
 

I have tried also cloning the Node

  
Node node = ((Node)vecNodes.get(ii)).cloneNode(true);

but still the same error.
Can anybody help me ?
Thanks
Francesco

[William Brogden]

 doc.importNode(node,true);  

I think you are using that incorrectly - the API says this call returns a new copy of the node without changing the original. So you should do something like:

appendChild( doc.importNode(node,true));  

Bill