java - Remove Element from JDOM document using removeContent() -

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given following scenario, xml, geography.xml looks - 

<geography xmlns:ns="some valid namespace">     <country>         <region>             <state>                 <city>                     <name></name>                     <population></population>                 </city>             </state>             </region>         </country>     </geography>

and following sample java code - 

inputstream = new fileinputstream("c:\\geography.xml"); saxbuilder saxbuilder = new saxbuilder(); document doc = saxbuilder.build(is);  xpath xpath = xpath.newinstance("/*/country/region/state/city"); element el = (element) xpath.selectsinglenode(doc); boolean b = doc.removecontent(el);

the removecontent() method doesn't remove element city content list of doc. value of b false
don't understand why not removing element, tried delete name & population elements xml see if issue apparently not.
way tried, don't know why know not different, still sake, use parent - 

parent p = el.getparent(); boolean s = p.removecontent(new element("city"));

what might problem? , possible solution? , if can share real behaviour of method removecontent(), suspect has parent-child relationship.

sure, removecontent(content child) removes child if child belongs parents immediate children, not in case. use el.detach()instead.


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