[jdom-interest] Exception when creating a document from arraylist

[X.P.Pratibha :-)]

Hi all ,

      Thanks for all your suggestion. The problem got solved after 
detaching the elments from the parent .I have highlighted the changes I 
made .
    Thanks Brad ,Phil and Mark.

Regards,
Pratibha

X.P.Pratibha :-) wrote:

> Hi all,
>        My problem is to edit an xml document to remove the duplicate 
> entries it has before giving it to the XSL for display....
> Here goes my logic:
>  1)Get the document.
> 2) traverse it for duplicate entries and put all the unique entries 
> into an array list
> 3) Then create the new document with elements in arraylist.
> 4)I am creating the root element and subroot element and adding the 
> each element in my array list...Here I am getting the exception
> "*element* *already* *has* an existing *parent FWRules" 
> --IllegalADDException.* 
> <http://www.jdom.org/pipermail/jdom-interest/2001-October/007851.html>
>
> P.S :The elements in the list has elements which in turn has so many 
> sub-elements...
>
> Can u please help me what I am doing wrong ???How to convert  a list 
> to Document again...I am using JDK1.3.1
>         
>                     Element Oldelem = 
> doc.getRootElement().getChild("Success").getChild("Rules");       
>                
>                          ListIterator OldIter = 
> Oldelem.getChild("FWRules").getChildren("ConRule").listIterator();
>                          Vector ID_ref = new Vector();
>                          ArrayList new_list = new ArrayList();
>                          int count=0;
>                          while(OldIter.hasNext())
>                          {
>                              Element OldChildElem=((Element) 
> OldIter.next());
>                              Element Attri = 
> OldChildElem.getChild("FWRule");
>                              String 
> ID=Attri.getAttributeValue("id");         

                               _*Element detached =(Element) 
OldChildElem.clone();*_

>                                               
>                              count++;
>                              if(count<=1)
>                              {                               
>                                  ID_ref.addElement(ID);             
>                   
>                                  new_list.add(*_detached_*);  
>                       
>
>                              }
>                              else if(!ID.equals(ID_ref.elementAt(0)))
>                              {                               
>                                  ID_ref.remove(0);
>                                  ID_ref.addElement(ID);
>                                  new_list.add(*_detached_*);           
>                 
>
>                              }
>                          }
>
>                         Document Doc_New = new Document(new 
> Element("Rules"));               
>                         Element sub-elem =new Element("FWRules");      
>                                                    
>                         for(int l=0;l<new_list.size();l++)
>                         {                      
>                            Element element_In_list = 
> ((Element)new_list.get(l));
>                            XMLOutputter output =new XMLOutputter();
>                            
> System.out.println("XMLOutputter:"+output.outputString(output));
>                            *sub-elem.addContent(elment_In_list); 
> //HERE IS where I get the exception*
>                        }
>                          Doc_New.getRootElement().addContent(subroot);
>
>                      }
>
>------------------------------------------------------------------------
>
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