[dom4j-user] new element not correctly added

[Matteo Floris]

Hi all
I have an empty xml file with this structre:

<?xml version="1.0" encoding="UTF-8"?>
<datasets>
<?target instruction?>
  <dataset id="DATA_01">
  </dataset>
  <dataset id="DATA_02">
  </dataset>
  <dataset id="DATA_03">
  </dataset>
</datasets>

when I add an element <object> I obtein

<?xml version="1.0" encoding="UTF-8"?>
<datasets>
<?target instruction?>
  <dataset id="DATA_01">
  <object>something</object></dataset>
  <dataset id="DATA_02">
  </dataset>
  <dataset id="DATA_03">
  </dataset>
</datasets>


                        SAXReader saxReader = new SAXReader();
                        Document document = saxReader.read(inputXml);
                        List list = document.selectNodes("/datasets/dataset/@id");
                        Iterator iter = list.iterator();
                        while (iter.hasNext()) {
                                Attribute attribute = (Attribute) iter.next();
                                if (attribute.getValue().equals( datasetID )) {
                                        Element thisDSet = attribute.getParent();
                                        Element newObj = thisDSet.addElement( "object" );
                                        newObj.addText( "something" );
                                }
                        }
                        XMLWriter output = new XMLWriter(new FileWriter( inputXml ));
                        output.write( document );
                        output.close();

the java code works properly, but the xml file is not well formatted...
does anybody know why the xml document is not well formatted?
thanks in advance,
MF.