Program: 58809
Project: 58809
Buggy source:
/** 
 * Fonction appeler par le bouton imprimer
 * @param request
 * @param response
 * @return
 */
public void showSaleOrder(ActionRequest request,ActionResponse response){
  SaleOrder saleOrder=request.getContext().asType(SaleOrder.class);
  StringBuilder url=new StringBuilder();
  String language="String_Node_Str";
  try {
    language=saleOrder.getClientPartner().getLanguageSelect() != null ? saleOrder.getClientPartner().getLanguageSelect() : saleOrder.getCompany().getPrintingSettings().getLanguageSelect() != null ? saleOrder.getCompany().getPrintingSettings().getLanguageSelect() : "String_Node_Str";
  }
 catch (  NullPointerException e) {
    language="String_Node_Str";
  }
  language=language.equals("String_Node_Str") ? "String_Node_Str" : language;
  url.append(new ReportSettings(IReport.SALES_ORDER,ReportSettings.FORMAT_PDF).addParam("String_Node_Str",language).addParam("String_Node_Str","String_Node_Str").addParam("String_Node_Str",saleOrder.getId().toString()).getUrl());
  LOG.debug("String_Node_Str",url);
  String urlNotExist=URLService.notExist(url.toString());
  if (urlNotExist == null) {
    LOG.debug("String_Node_Str" + saleOrder.getSaleOrderSeq() + "String_Node_Str"+ url.toString());
    String title=I18n.get("String_Node_Str");
    if (saleOrder.getSaleOrderSeq() != null) {
      title+=saleOrder.getSaleOrderSeq();
    }
    Map<String,Object> mapView=new HashMap<String,Object>();
    mapView.put("String_Node_Str",title);
    mapView.put("String_Node_Str",url);
    mapView.put("String_Node_Str","String_Node_Str");
    response.setView(mapView);
  }
 else {
    response.setFlash(urlNotExist);
  }
}

Fixed version (ground truth):
/** 
 * @param request
 * @param response
 * @return
 */
public void showSaleOrder(ActionRequest request,ActionResponse response){
  SaleOrder saleOrder=request.getContext().asType(SaleOrder.class);
  StringBuilder url=new StringBuilder();
  String language="String_Node_Str";
  try {
    language=saleOrder.getClientPartner().getLanguageSelect() != null ? saleOrder.getClientPartner().getLanguageSelect() : saleOrder.getCompany().getPrintingSettings().getLanguageSelect() != null ? saleOrder.getCompany().getPrintingSettings().getLanguageSelect() : "String_Node_Str";
  }
 catch (  NullPointerException e) {
    language="String_Node_Str";
  }
  language=language.equals("String_Node_Str") ? "String_Node_Str" : language;
  url.append(new ReportSettings(IReport.SALES_ORDER,ReportSettings.FORMAT_PDF).addParam("String_Node_Str",language).addParam("String_Node_Str","String_Node_Str").addParam("String_Node_Str",saleOrder.getId().toString()).getUrl());
  LOG.debug("String_Node_Str",url);
  String urlNotExist=URLService.notExist(url.toString());
  if (urlNotExist == null) {
    LOG.debug("String_Node_Str" + saleOrder.getSaleOrderSeq() + "String_Node_Str"+ url.toString());
    String title=I18n.get("String_Node_Str");
    if (saleOrder.getSaleOrderSeq() != null) {
      title+=saleOrder.getSaleOrderSeq();
    }
    Map<String,Object> mapView=new HashMap<String,Object>();
    mapView.put("String_Node_Str",title);
    mapView.put("String_Node_Str",url);
    mapView.put("String_Node_Str","String_Node_Str");
    response.setView(mapView);
  }
 else {
    response.setFlash(urlNotExist);
  }
}