Program: 44121
Project: 44121
Buggy source:
/** 
 * Web service operation
 */
@WebMethod(operationName="String_Node_Str") public boolean receivePayment(@WebParam(name="String_Node_Str") String orderNum,@WebParam(name="String_Node_Str") float totalPrice){
  MessageContext ctxt=wsc.getMessageContext();
  ServletContext req=(ServletContext)ctxt.get(ctxt.SERVLET_CONTEXT);
  String path=req.getRealPath("String_Node_Str");
  ORDERS_XML=path + "String_Node_Str" + ORDERS_XML;
  File file=new File(ORDERS_XML);
  try {
    DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
    DocumentBuilder db=dbf.newDocumentBuilder();
    InputSource is=new InputSource();
    is.setCharacterStream(new FileReader(file));
    Document doc=db.parse(is);
    Document newDoc=db.newDocument();
    Element root=newDoc.createElement("String_Node_Str");
    boolean flag=false;
    NodeList orders=doc.getElementsByTagName("String_Node_Str");
    for (int i=0; i < orders.getLength(); i++) {
      Element order=(Element)orders.item(i);
      if (getTextValue(order,"String_Node_Str").equals(orderNum)) {
        if (getFloatValue(order,"String_Node_Str") == totalPrice) {
          order.getElementsByTagName("String_Node_Str").item(0).setTextContent("String_Node_Str");
          flag=true;
        }
      }
      Node newNode=newDoc.importNode(order,true);
      root.appendChild(newNode);
    }
    Node docRoot=newDoc.importNode(root,true);
    newDoc.appendChild(docRoot);
    TransformerFactory transformerFactory=TransformerFactory.newInstance();
    Transformer transformer=transformerFactory.newTransformer();
    DOMSource source=new DOMSource(newDoc);
    StreamResult result=new StreamResult(ORDERS_XML);
    transformer.transform(source,result);
    return flag;
  }
 catch (  Exception e) {
    System.out.println("String_Node_Str" + e.getMessage());
  }
  return false;
}

Fixed version (ground truth):
/** 
 * Web service operation
 */
@WebMethod(operationName="String_Node_Str") public boolean receivePayment(@WebParam(name="String_Node_Str") String orderNum,@WebParam(name="String_Node_Str") float totalPrice){
  MessageContext ctxt=wsc.getMessageContext();
  ServletContext req=(ServletContext)ctxt.get(ctxt.SERVLET_CONTEXT);
  String path=req.getRealPath("String_Node_Str");
  if (!ORDERS_XML.startsWith(path))   ORDERS_XML=path + "String_Node_Str" + ORDERS_XML;
  File file=new File(ORDERS_XML);
  try {
    DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
    DocumentBuilder db=dbf.newDocumentBuilder();
    InputSource is=new InputSource();
    is.setCharacterStream(new FileReader(file));
    Document doc=db.parse(is);
    Document newDoc=db.newDocument();
    Element root=newDoc.createElement("String_Node_Str");
    boolean flag=false;
    NodeList orders=doc.getElementsByTagName("String_Node_Str");
    for (int i=0; i < orders.getLength(); i++) {
      Element order=(Element)orders.item(i);
      if (getTextValue(order,"String_Node_Str").equals(orderNum)) {
        if (getFloatValue(order,"String_Node_Str") == totalPrice) {
          order.getElementsByTagName("String_Node_Str").item(0).setTextContent("String_Node_Str");
          flag=true;
        }
      }
      Node newNode=newDoc.importNode(order,true);
      root.appendChild(newNode);
    }
    Node docRoot=newDoc.importNode(root,true);
    newDoc.appendChild(docRoot);
    TransformerFactory transformerFactory=TransformerFactory.newInstance();
    Transformer transformer=transformerFactory.newTransformer();
    DOMSource source=new DOMSource(newDoc);
    StreamResult result=new StreamResult(ORDERS_XML);
    transformer.transform(source,result);
    return flag;
  }
 catch (  Exception e) {
    System.out.println("String_Node_Str" + e.getMessage());
  }
  return false;
}