Program: 59091
Project: 59091
Buggy source:
/** 
 * Fonction appeler par le bouton imprimer
 * @param request
 * @param response
 * @return
 */
public void showPurchaseOrder(ActionRequest request,ActionResponse response){
  PurchaseOrder purchaseOrder=request.getContext().asType(PurchaseOrder.class);
  StringBuilder url=new StringBuilder();
  AxelorSettings axelorSettings=AxelorSettings.get();
  String language="String_Node_Str";
  try {
    language=purchaseOrder.getSupplierPartner().getLanguageSelect() != null ? purchaseOrder.getSupplierPartner().getLanguageSelect() : purchaseOrder.getCompany().getPrintingSettings().getLanguageSelect() != null ? purchaseOrder.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(axelorSettings.get("String_Node_Str","String_Node_Str") + "String_Node_Str" + purchaseOrder.getId()+ "String_Node_Str"+ language+ axelorSettings.get("String_Node_Str"));
  LOG.debug("String_Node_Str",url);
  String urlNotExist=URLService.notExist(url.toString());
  if (urlNotExist == null) {
    LOG.debug("String_Node_Str" + purchaseOrder.getPurchaseOrderSeq() + "String_Node_Str"+ url.toString());
    String title="String_Node_Str";
    if (purchaseOrder.getPurchaseOrderSeq() != null) {
      title+=purchaseOrder.getPurchaseOrderSeq();
    }
    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):
/** 
 * Fonction appeler par le bouton imprimer
 * @param request
 * @param response
 * @return
 */
public void showPurchaseOrder(ActionRequest request,ActionResponse response){
  PurchaseOrder purchaseOrder=request.getContext().asType(PurchaseOrder.class);
  StringBuilder url=new StringBuilder();
  AxelorSettings axelorSettings=AxelorSettings.get();
  String purchaseOrderIds="String_Node_Str";
  @SuppressWarnings("String_Node_Str") List<Integer> lstSelectedPurchaseOrder=(List<Integer>)request.getContext().get("String_Node_Str");
  if (lstSelectedPurchaseOrder != null) {
    for (    Integer it : lstSelectedPurchaseOrder) {
      purchaseOrderIds+=it.toString() + "String_Node_Str";
    }
  }
  if (!purchaseOrderIds.equals("String_Node_Str")) {
    purchaseOrderIds="String_Node_Str" + purchaseOrderIds.substring(0,purchaseOrderIds.length() - 1);
    purchaseOrder=purchaseOrder.find(new Long(lstSelectedPurchaseOrder.get(0)));
  }
 else   if (purchaseOrder.getId() != null) {
    purchaseOrderIds="String_Node_Str" + purchaseOrder.getId();
  }
  String language="String_Node_Str";
  try {
    language=purchaseOrder.getSupplierPartner().getLanguageSelect() != null ? purchaseOrder.getSupplierPartner().getLanguageSelect() : purchaseOrder.getCompany().getPrintingSettings().getLanguageSelect() != null ? purchaseOrder.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(axelorSettings.get("String_Node_Str","String_Node_Str") + "String_Node_Str" + purchaseOrderIds+ "String_Node_Str"+ language+ axelorSettings.get("String_Node_Str"));
  LOG.debug("String_Node_Str",url);
  String urlNotExist=URLService.notExist(url.toString());
  if (urlNotExist == null) {
    LOG.debug("String_Node_Str" + purchaseOrder.getPurchaseOrderSeq() + "String_Node_Str"+ url.toString());
    String title="String_Node_Str";
    if (purchaseOrder.getPurchaseOrderSeq() != null) {
      title+=purchaseOrder.getPurchaseOrderSeq();
    }
    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);
  }
}