java - Wizard Component PrimeFaces Updating other variables -

i have 2 tabs. wizard component, when press 'next' button (from first tab), need populate list(with selectitem objects) , show these selectitems in selectonemenu tag in second tab. have finished entering data on first tab , press 'next' button, selectonemenu tag(on second tab) not have in it.

basically, need update next tab along processing of current tab. anyway this?

thanks in advance.

here code:

<p:wizard widgetvar="wiz" shownavbar="true" flowlistener="#{detentionform.onflowprocess}">                 <p:tab id="typeofleader" title="leader selection">                     <p:panel header="leader selection">                         <p:messages showsummary="true" showdetail="false"/>                         <p:panelgrid columns="2">                             #{msgs.typeofleaderpunishment}                             <p:selectonemenu value="#{detentionform.typeofleaderselectedid}" style="width:400px" panelstyle="width:150px" effect="fade">                                 <f:selectitems value="#{detentionform.teachertypes}" var="type" itemlabel="#{type.label}" itemvalue="#{type.value}" />                             </p:selectonemenu>                         </p:panelgrid>                      </p:panel>                 </p:tab>                 <p:tab id="typeofpunishment" title="punishment type">                     <p:panel header="type of punishment">                         <p:panelgrid columns="2">                             #{msgs.typeofdetention}                             <p:selectonemenu value="#{detentionform.typeofpunishment}" style="width:400px" panelstyle="width:150px" effect="fade" >                                 <f:selectitems value="#{detentionform.detentiontypes}" var="type" itemlabel="#{type.label}" itemvalue="#{type.value}" />                             </p:selectonemenu>                          </p:panelgrid>                      </p:panel>                 </p:tab>              </p:wizard> 

#{detentionform.detentiontypes} arraylist needs populated once press 'next' button second tab.

here backing bean:

@viewscoped @named("detentionform") public class detentionformbean implements serializable{     @resource(name="jdbc/detentioncentre")     private datasource ds;      private details details = (details) facescontext.getcurrentinstance().getexternalcontext().getsessionmap().get("userdetails");        private string typeofpunishment;     private string typeofleader = details.gettypeofleader(); //can change if user house leader. eg. can become teacher when making punishment     private int typeofleaderid; //id in database of teacher's type of leadership     private int typeofleaderselectedid = 1; //set default teacher house leader can teacher , normal teacher teacher!     private arraylist<selectitem> detentiontypes = new arraylist<selectitem>(); //selectitem objects shows punishments each teacher can     private arraylist<selectitem> teachertypes = new arraylist<selectitem>(); //selectitem objects shows type of leadership teacher can (teacher or house leader)       //gets data necessary database show on page     @postconstruct     public void initialize(){         this.settypeofleaderid(details.getusername()); //gets id database find out default type of leadership         this.findteachertypes(this.typeofleader);      }       public string onflowprocess(flowevent event) {  //change later backing >>>>>>>>>>>>>>             string steptogo = event.getnewstep();             if(steptogo.equals("typeofpunishment")){                 this.finddetentiontypes();              }         return steptogo;      }      //populates teachertype arraylist depending user's teacher type. house leader can teacher or house leader.     private void findteachertypes(string type) {         if(type.equals("house leadership team")){             this.teachertypes.add(new selectitem(integer.tostring(this.typeofleaderid), type)); //house leader 2             this.teachertypes.add(new selectitem(integer.tostring(this.typeofleaderid - 1), "teacher" )); //teacher 1         }else{ //type teacher             this.teachertypes.add(new selectitem(integer.tostring(this.typeofleaderid), type)); //teacher 1         }     }       //populates detentiontypes depending on type of leader     private void finddetentiontypes() {         system.out.println(">>>>inside finddetentiontypes()!!!");         preparedstatement ps;         connection con;         string sqlinitialdata = "select r.punishment_type, p.type detentioncentredb.tbl_teacher_roles_allowed_punishments r, detentioncentredb.tbl_punishment_types p r.teacher_roles = ? , p.id = r.punishment_type";         resultset rs;          try {             con = ds.getconnection();             ps = con.preparestatement(sqlinitialdata);             ps.setstring(1, integer.tostring(this.typeofleaderselectedid));              rs = ps.executequery();             while(rs.next()){                 selectitem s = new selectitem(rs.getstring("punishment_type"), rs.getstring("type"));                 this.detentiontypes.add(s);             }             rs.close();             ps.close();             con.close();          } catch (sqlexception ex) {             logger.getlogger(detentionformbean.class.getname()).log(level.severe, null, ex);         }     }      //getter , setter methods      public string gettypeofpunishment() {         return typeofpunishment;     }      public void settypeofpunishment(string typeofpunishment) {         this.typeofpunishment = typeofpunishment;     }      public string gettypeofleader() {         return typeofleader;     }      public arraylist<selectitem> getdetentiontypes() {         return detentiontypes;     }      public arraylist<selectitem> getteachertypes() {         return teachertypes;     }      public int gettypeofleaderid() {         return typeofleaderid;     }      //gets typeofleader current user database. retrieves id of teacher's type of leadership. not teacher selected.     private void settypeofleaderid(int username){         preparedstatement ps;         connection con;         string sqltypeofleaderid = "select typeofleader detentioncentredb.tbl_teachers regnumber = ?";         resultset rs;         try {             con = ds.getconnection();             ps = con.preparestatement(sqltypeofleaderid);             ps.setint(1, username);             rs = ps.executequery();             while(rs.next()){                 this.typeofleaderid = rs.getint("typeofleader");             }             rs.close();             ps.close();             con.close();         } catch (sqlexception ex) {             logger.getlogger(detentionformbean.class.getname()).log(level.severe, null, ex);         }     }      public int gettypeofleaderselectedid() {         return typeofleaderselectedid;     }      public void settypeofleaderselectedid(int typeofleaderselectedid) {         this.typeofleaderselectedid = typeofleaderselectedid;     }   } 

you can use ajax notify server side stepping wizard. pf documentation:

if you’d notified on server side when wizard attempts go or forward, define flowlistener.

<p:wizard flowlistener="#{userwizard.handleflow}"> ... </p:wizard>  public string handleflow(flowevent event) {     string currentstepid = event.getcurrentstep();     string steptogo = event.getnextstep();     if(skip)         return "confirm";     else         return event.getnextstep();     } 

in case, need load detentiontypes array when steptogo reaches typeofpunishment, based on user has selected on first step of wizard:

public string handleflow(flowevent event) {     string steptogo = event.getnextstep();     if(steptogo.equals("typeofpunishment")){         detentiontypes = service.loaddetentiontypes(this.typeofleaderselectedid);     } }