Hi , I want to validate some text fields at before persist / merge

But form show validate error and also update database value .

This Function use to render data Model Panel and also fetch the data from database and show into Data Table

@SuppressWarnings("unchecked")
     @Begin(join = true,flushMode=FlushModeType.MANUAL)
     public void loadMachineryListForRH() {
          log.info("Entering getMachineryList() method");

          List<Machinery> machList = new ArrayList<Machinery>(0);

          machList = tenantEntityManager.createQuery(
                    "select mc from Machinery mc where mc.flgDeleted = 0"
                              + "and mc.shipMaster.ishipId="
                              + Contexts.getSessionContext().get("shipId"))
                    .getResultList();
          tenantEntityManager.flush();

          machineryRList = machList;

          prevMachineryRList = new ArrayList<Machinery>(0);

          for (Machinery mc : machList) {
               Machinery m = new Machinery();
               m.setImachineryId(mc.getImachineryId());
               m.setIrunningHours(mc.getIrunningHours());
               prevMachineryRList.add(m);
          }

          showOverlay = true;
          log.info("Exiting getMachineryList() method with size of list=="
                    + machineryRList.size());
     }

And This Function Use For Merging

@SuppressWarnings("unchecked")
     @Begin(join = true,flushMode=FlushModeType.MANUAL)
     public void persistRuningHoursForAll() {

          log.info("Enter in persist running hours For All method");
          String numeric_regex = "[0-9]*"; 
          String machineryName = "";
          Integer oldRunningHrs = 0;
          Integer newRunningHrs = 0;

          SeamResourceBundle srb = new SeamResourceBundle();
          int DISABLE_EDIT_JOB_DONE_DAYS = Integer.parseInt(srb
                    .getString("DISABLE_EDIT_JOB_DONE_DAYS"));
          
          
          Date today = new Date();
          boolean validate = false;
          boolean subValidate = false;
          for (Machinery mach : machineryRList) {
               for (Machinery prevMach : prevMachineryRList) {
                    if (prevMach.getImachineryId() == mach.getImachineryId()) {
                         if (mach.getIrunningHours() < prevMach.getIrunningHours()) {

                              machineryName = mach.getStrName();
                              oldRunningHrs = prevMach.getIrunningHours();
                              newRunningHrs = mach.getIrunningHours();
                              int days = compareToDate(mach.getDtUpdated(), today); 
                              if(days > DISABLE_EDIT_JOB_DONE_DAYS){ 
                              
                                   facesMessages.addToControl(
                                        "addRunningHoursPanel",
                                        "MacineryName"+machineryName+" We can not decrease running hrs after seven days");
                              validate = true;
                              break;
                              }
                         }
                    }
               }
          }

          
          if (!validate){
               for (Machinery mach : machineryRList) {

                    log.info("Machinery running hours" + mach.getIrunningHours());

                    if (mach.getIrunningHours() != null) {
                         if (!(mach.getIrunningHours().toString()
                                   .matches(numeric_regex))) {
                              facesMessages.addToControlFromResourceBundle(
                                        "addRunningHoursPanel", "validator.numeric");
                              subValidate = true;
                              break;
                         }
                    }

                    if (mach.getIrunningHours() == null) {
                         mach.setIrunningHours(0);
                         tenantEntityManager.merge(mach);
                         tenantEntityManager.flush();
                    }

                    for (Machinery prevMach : prevMachineryRList) {

                         if (mach.getIrunningHours() != prevMach.getIrunningHours()) {
                              mach.setDtUpdated(new Date());
                         }
                         if (prevMach.getImachineryId() == mach.getImachineryId()) {

                              int componentRh = mach.getIrunningHours()
                                        - prevMach.getIrunningHours();

                              String compQl = " select comp from Component comp where comp.flgIsInUse = 1 and "
                                        + " comp.machinery.imachineryId = "
                                        + mach.getImachineryId()
                                        + "and comp.shipMaster.ishipId="
                                        + Contexts.getSessionContext().get("shipId");

                              List<Component> compList = tenantEntityManager
                                        .createQuery(compQl).getResultList();

                              for (Component cmp : compList) {
                                   cmp.setIrunningHours(cmp.getIrunningHours()
                                             + componentRh);
                                   tenantEntityManager.merge(cmp);
                                   tenantEntityManager.flush();
                              }
                         }
                    }
                    mach.setFlgIsDirty(2);
                    tenantEntityManager.merge(mach);
                    tenantEntityManager.flush();
                    this.showOverlay = false;
               }
               
          }     
          
          if(!validate && !subValidate){
               this.status = "due";
               setStatus("due");

               facesMessages
                         .addFromResourceBundle("message.runninghrs.updated.successful");
               fetchMaintenanceJobsTypeDetails();
          }
          
     }

Thanks In Advance ...........