JDOM: attach Content to other Element?

[Lukas Benberg]

hello all,
i have a JDOM Document. i would like to add the content of this document's root element to the root element of another document. here is my attempt:

// create the document
SAXBuilder builder = new SAXBuilder();
Document doc1 = builder.build(new StringReader ("<elem>test<e2></e2><t/></elem>"));
 
// get content of root element
List content = doc1.getRootElement().getContent();
 
// detach: --> same exception with or without this
for(int i=0;i<=content.size();i++){
Content next = (Content)content.get(i);
next.detach();
}
 
// create 2nd document with root element
Document doc2 = new Document();
doc2.setRootElement(new Element("root2"));
 
// add content to new root: Exception here
doc2.getRootElement().setContent(content); 

Exception in thread "main" org.jdom.IllegalAddException: The Content already has an existing parent "elem"

how can i do this?
thank you!

[rodd manning]

Hi,
I had faced a similar issue when i was working with JDOM, and i tried working with the detach() method, but was unsuccessful.The following approach will solve your problem
i also found another solution:

// get content of root element
List content = doc1.getRootElement().cloneContent();

cloneContent() instead of getContent() does it. you don't have to detach then.