single check box check at a time in a af:table

public void singleChk(ValueChangeEvent vce){

        vce.getComponent().processUpdates(FacesContext.getCurrentInstance());  

        

        DCBindingContainer bindings = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();

        // Get an object representing the table and what may be selected within it

        DCIteratorBinding dcItteratorBindings1 = bindings.findIteratorBinding("DepartmentsVO1Iterator");

        // FacesContext context = FacesContext.getCurrentInstance();

        BindingContext bindingContext = BindingContext.getCurrent();

        DCDataControl dc =

            bindingContext.findDataControl("AppAMModuleDataControl"); // Name of application module in datacontrolBinding.cpx

        AppAMModuleImpl appM = (AppAMModuleImpl)dc.getDataProvider();

     

        ViewObject voTableData1= appM.findViewObject("DepartmentsVO1"); 

        Row currRow = voTableData1.getCurrentRow(); 

        Integer deptid = (Integer)currRow.getAttribute("DepartmentId");

        Row r[] = voTableData1.getFilteredRows("TSelect", "Y");

       if(r.length>0){

        for(Row rselect : r){

            Integer deptidSelect = (Integer)rselect.getAttribute("DepartmentId");

            if(deptid!=deptidSelect){

                rselect.setAttribute("TSelect", "N");

            }

        }
}

        

        AdfFacesContext.getCurrentInstance().addPartialTarget(sbc1);  

        AdfFacesContext.getCurrentInstance().addPartialTarget(t1);

    }

-------------------------------

below one failing in few cases

public void chk_vc(ValueChangeEvent vce) {

     

     

        try{

        vce.getComponent().processUpdates(FacesContext.getCurrentInstance());

          ViewObject vo=  ReusableMethodsClassCredit.getAM().findViewObject("WriteoffReviewDtlVO1");

          Row r1=  ReusableMethodsClassCredit.getCurrentRowFromVO("WriteoffReviewDtlVO1");

   

        String chk = (String)r1.getAttribute("TselectALLNONE");

            System.out.println(" r1 chk "+chk);

        if ("Y".equals(chk)) {

       

            int cnt = vo.getRowCount();

            System.out.println("current row count "+cnt);

            Row r = null;

            for (int i = 1; i <= cnt; i++) {

                if (i == 1) {

                    System.out.println("going to first ");

                    r = vo.first();

                  //  System.out.println("going to first "+r.getAttribute("AcctNo"));

                } else {

                    System.out.println("going to next ");

                    r = vo.next();

                 //   System.out.println("going to next "+r.getAttribute("AcctNo"));

                }

           

                r.setAttribute("TselectALLNONE", "N");

               // System.out.println("---note gen afterset --TselectPend- r-" + r.getAttribute("TselectPend")+r.getAttribute("AcctNo"));

                RichSelectBooleanCheckbox box =this.getSbc1();

               // box.setValue("N");

            }

            r1.setAttribute("TselectALLNONE", "Y");

         //   System.out.println("---note gen afterset --TselectPend- r1-" + r1.getAttribute("TselectPend")+r1.getAttribute("AcctNo"));

         

           AdfFacesContext.getCurrentInstance().addPartialTarget(sbc5);

            AdfFacesContext.getCurrentInstance().addPartialTarget(t1);

        }

        }catch (Exception e) {

                BindingContext bctx = BindingContext.getCurrent();

                ((DCBindingContainer)bctx.getCurrentBindingsEntry()).reportException(e);

         

        }

    }