Modify XML using StAX

Sample XML

<?xml version="1.0"?>
<connection>
    <number id="1"></number>
    <number id="2"></number>
    <number id="3"></number>
</connection>

ModifyXML.java

import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

public class ModifyxmlSelf {
 public static void main(String[] args) {
  XMLInputFactory ifactory=XMLInputFactory.newFactory();
  XMLOutputFactory ofactory=XMLOutputFactory.newFactory();
  StreamSource source =new StreamSource("connection.xml");
  StreamResult result=new StreamResult("connection.xml");
  try {
   XMLEventReader in=ifactory.createXMLEventReader(source);
   XMLEventWriter out=ofactory.createXMLEventWriter(result);
   while(in.hasNext()){
    XMLEvent e=in.nextEvent();
    if(e.isStartElement() && ((StartElement)e).getName().getLocalPart().equalsIgnoreCase("Number")){
     Attribute a=((StartElement)e).getAttributeByName(new QName("id"));
     if(a.getValue().equalsIgnoreCase("3")){
      in.next();
      continue;
     }
    }
    out.add(e);
   }
   in.close();
   out.close();
  } catch (XMLStreamException e) {
   e.printStackTrace();
  }
 }
}

output XML

<?xml version="1.0"?>
<connection>
    <number id="1"></number>
    <number id="2"></number>
</connection>