XML : XMLStreamException: No element was found to write: ArrayIndexOutOfBoundsException while parsing xml file using StAX

In below xml file I have File name and its respective rule numbers in hashmap(named 'ds' in source code) in format {{file1.c,{1234,3456,5087,9900,....}},{file2.c,{1234,3456,5087,9900,....}}>, if for file1.c any rule number in given list exists in xml file for <QACRule> tag (here 5087 is matching) I want to delete its parent node i.e. <Complain> node.

  <SourceFiles>          **<File name="file1.c">**              <FileSummary>                  <QAC>                      <StatDev>0</StatDev>                      <StatIntendDev>1</StatIntendDev>                  </QAC>                  <Developer>                      <StatDev>0</StatDev>                      <StatIntendDev>0</StatIntendDev>                      <StatBlank>1</StatBlank>                  </Developer>                  <Total>                      <TotalRank>intended deviation</TotalRank>                      <StatDev>0</StatDev>                      <StatIntendDev>1</StatIntendDev>                  </Total>              </FileSummary>              **<Complain lfd="1">**                  <Line>43</Line>                  <Description>"#include statements"</Description>                  <Rule>                          **<QACRule>5087</QACRule>**                          <CodingStd>18.1.</CodingStd>              <Deviation>true</Deviation>                  </Rule>                  <Ranking>                      <QACRank>intended deviation</QACRank>                      <DeveloperRank></DeveloperRank>                      <TotalRank>intended deviation</TotalRank>                  </Ranking>                  <Comment>these includes must stay here at this position</Comment>              </Complain>              **<Complain lfd="2">**                  <Line>140</Line>                  <Description>"#include statements"</Description>                  <Rule>                          **<QACRule>55555</QACRule>**                          <CodingStd>18.1.</CodingStd>              <Deviation>true</Deviation>                  </Rule>                  <Ranking>                      <QACRank>intended deviation</QACRank>                      <DeveloperRank></DeveloperRank>                      <TotalRank>intended deviation</TotalRank>                  </Ranking>                  <Comment>these includes must stay here at this position</Comment>              </Complain>          </File>                       <File name="file2.c>                            ......                        </File>             

but I'm not understanding the thing that after checking <QACRule> value in hashmap how can I go above and delete the <Complain> node ?

I tried following java code:

      inFactory = XMLInputFactory.newInstance();          outFactory= XMLOutputFactory.newInstance();          eventReader = inFactory.createXMLEventReader(new FileReader(inputFilePath));          out=new FileOutputStream("C:\\Users\\uidg8154\\Desktop\\new.xml");          eventWriter= outFactory.createXMLEventWriter(out);          while(eventReader.hasNext()){              XMLEvent event=eventReader.nextEvent();                if(event.isStartElement() && event.asStartElement().getName().getLocalPart().equalsIgnoreCase("SourceFiles") ){                  isSourceFileParent=true;                      System.out.println("-------start of <SourceFies>---------");                  srcFiles=new SourceFiles();              }              if(event.isEndElement() && event.asEndElement().getName().getLocalPart().equalsIgnoreCase("SourceFiles")){                  isSourceFileParent=false;                  System.out.println("-------end of <SourceFies>---------");                }              if(isSourceFileParent==true && event.isStartElement() && event.asStartElement().getName().getLocalPart().equalsIgnoreCase("File")){                  fileNameValue=event.asStartElement().getAttributeByName(new QName("name")).getValue();                  System.out.println(fileNameValue);                  sourceFileNamesFromInputXml.add(fileNameValue);              }              if(isSourceFileParent==true && event.isStartElement() && event.asStartElement().getName().getLocalPart().equalsIgnoreCase("Complain")){                   complainIdValue=event.asStartElement().getAttributeByName(new QName("lfd")).getValue();                  System.out.println(complainIdValue);              }                if(isSourceFileParent==true && event.isStartElement() && event.asStartElement().getName().getLocalPart().equalsIgnoreCase("QACRule")){                   event = eventReader.nextEvent();                  isQacRuleParent=true;                  isProceed=true;                  qacRuleNoValue=event.asCharacters().getData();              }                if(ds.containsKey(fileNameValue) && isProceed==true){                  qacRuleNos=ds.get(fileNameValue);                  if(qacRuleNos.contains(qacRuleNoValue)){                      isIgnoreComplainNode=true;                  }              }                if (isSourceFileParent==true && event.isEndElement() && event.asEndElement().getName().getLocalPart().equals("Complain") && isIgnoreComplainNode==true) {                      isIgnoreComplainNode=false;                  }                if(isIgnoreComplainNode==false){                  System.out.println(event);                  eventWriter.add(event);              }           }//end of while          eventWriter.flush();          eventWriter.close();    

with this code I'm facing "javax.xml.stream.XMLStreamException: No element was found to write: java.lang.ArrayIndexOutOfBoundsException: -1" exception and wierdly written output file.