[jdom-interest] copying element content - again

[John Muhlestein]

Use Element.clone() to get a deep clone of the Element then use
Element.detach() to eliminate the existing parent exception.

<CodeSnippet>
  Element copyElt = (Element)origElt.clone();
  copyElt.detach();
</CodeSnippet>
<explanation>
  where origElt is the Element you want to copy 
  and copyElt is the Element resulting from the copy.
</explanation>

John

> -----Original Message-----
> From: vonderLuft, Andrew [mailto:vonderluft.andrew at con-way.com]
> Sent: Tuesday, April 09, 2002 11:19 AM
> To: 'Jdom-Interest (E-mail)'
> Subject: [jdom-interest] copying element content - again
> 
> 
> Anyone have any input on this?  
> 
> -----Original Message-----
> From: vonderLuft, Andrew 
> Sent: Friday, April 05, 2002 3:04 PM
> To: Jdom-Interest (E-mail)
> Subject: copying element content
> 
> 
> Please forgive my ignorance, but surely there is a simple way 
> to copy all
> the content of one element to another, e.g. 
> 
> oneElement.setContent(another.getContent());
> 
> However, this never works for me -- not sure why.  It either 
> hangs or gives
> me "existing parent" errors.  I've resorted to writing this 
> utility method,
> which, BTW, I submit for your use and/or abuse:
> 
> /**
>  * <p>
>  * <code>copyElementContent</code> copies content of source 
> Element argument
>  * to destination Element argument, which is returned.
>  * Processes recursively to copy entire tree of child elements.
>  * </p>
>  * Creation date: (8/31/2001 1:44:07 PM)
>  * @author: Andrew vonderLuft
>  * @param: source org.jdom.Element - the source Element
>  * @param: dest org.jdom.Element - the destination Element
>  * @return: org.jdom.Element - the Element with copied content
>  */
> public static Element copyElementContent(Element source, 
> Element dest) {
> 
> 	if (source == null) return null;
> 	if (dest == null) dest = new Element(source.getName());
> 
> 	dest.removeChildren();
> 
> 	if (source.hasChildren()) {
> 		List children = source.getChildren();
> 		Element childSource, childDest;
> 		for (int i=0; i < children.size(); i++) {
> 			childSource = (Element) children.get(i);
> 			childDest = new Element(childSource.getName());
> 
> 			dest.addContent(copyElementContent(childSource,
> childDest));
> 		}
> 	} else {
> 		if (source.getText().length() > 0)
> dest.setText(source.getText());
> 	}
> 
> 	List attrList = source.getAttributes();
> 	if (attrList.size() > 0) {
> 		for (int i = 0; i < attrList.size(); i++) {
> 			dest.setAttribute( ((Attribute)
> attrList.get(i)).detach());
> 		}
> 	}
> 	return dest;
> 	
> }
> 
> 
> 
> /**
>  * <mailto:vonderluft.andrew at con-way.com>
>  * Desk: 503.450.6055   Fax: 503.450.5790           
>  * CON-WAY I.T. <www.con-way.com>
>  * @author: Andrew vonderLuft 
>  */
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