JDOM: detach problem

[Lukas Benberg]

hello all,
i would like to detach Elements from their parent and add them to a new element using jdom. i do it like below, but i get an org.jdom.IllegalAddException: The Content already has an existing parent "OLD_ROOT_NAME".

can anyone give me a hint whats the problem here? do i have to synchronize the detach() method?

thank you!

public void moveElements(Element oldRoot){
 
//get children from an Element
List children = oldRoot.getChildren("name");

//detach them (see below)
detach(children);
 
//create new root element
Element newRoot = new Element("name");
 
//add elements to new root
newRoot.addContent(testChildren);
}
 
private void detach(List li){
//detach all elements of an Element List
for(int i=0;i<li.size();i++){
Element next = (Element)li.get(i);
next.detach();
}
}

[Paul Clapham]

You call detach() on a bunch of nodes. Then you call addContent with a completely different node, one that you apparently never called detach on.

[Lukas Benberg]

sorry, that is just an typing error. i add the whole list to the newRoot, so it should be:

//add elements to new root
newRoot.addContent(children);