مشكله فى p:selectOneMenu فى ال JSF

السلام عليكم ورحمة الله وبركاته

انا عندى مشكله فى استخدام ال p:selectOneMenu

وهى ان ال value الموجوده فى ال selectOneMenu

لا تظهر فى ال inputtext موجود فى p:dialog

والذى يظهر عندما اضغط على p:commandputton

هذه هى ال managebean

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package beans;

import dao.AdminDAO;
import dao.UserRegister;
import java.util.ArrayList;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import javax.faces.event.ValueChangeEvent;
import javax.faces.model.SelectItem;

/**
 *
 * @author shokry
 */
@ViewScoped
@ManagedBean()
public class FacultyMB {

    University university;
    Faculty faculty;
    public AdminDAO adminDAO;

    public University getUniversity() {
        if (university == null) {
            university = new University();
        }
        return university;
    }

    public void setUniversity(University university) {
        this.university = university;
    }

    public Faculty getFaculty() {
        if (faculty == null) {
            faculty = new Faculty();
        }
        return faculty;
    }

    public void setFaculty(Faculty faculty) {
        this.faculty = faculty;
    }

    public ArrayList<SelectItem> getUniversities() {
        ArrayList<University> lst = UserRegister.getUniversities();
        ArrayList<SelectItem> items = new ArrayList<SelectItem>();

        for (University t : lst) {
            items.add(new SelectItem(t.getUniversityId(), t.getName()));
        }

        return items;
    }

    public ArrayList<SelectItem> getUniFaculties() {
        ArrayList<Faculty> lst = UserRegister.getUniFaculties(university.getUniversityId());
        ArrayList<SelectItem> items = new ArrayList<SelectItem>();

        for (Faculty t : lst) {
            items.add(new SelectItem(t.getFacultyId(), t.getName()));
        }

        return items;
    }

    public void addUniversity() {
        adminDAO = new AdminDAO();
        adminDAO.addUniversity(university.getName());
    }

    public void editUniversity() {
        System.out.println("university is :  "
                + university.getName() + "");
        adminDAO = new AdminDAO();
        adminDAO.editUniversity(university.getUniversityId(), university.getName());
    }

    public void deleteUniversity() {
        adminDAO = new AdminDAO();
        adminDAO.deleteUniversity(university.getUniversityId());
    }

    public void addFaculty() {
        System.out.println("university is :  " + university.getUniversityId() + " universityid is : " + university.getUniversityId());
        adminDAO = new AdminDAO();
        adminDAO.addFaculty(faculty.getName(), 3);
    }

    public void deleteFaculty() {
        adminDAO = new AdminDAO();
        adminDAO.deleteFaculty(faculty.getFacultyId());
    }

    public void editFaculty() {
        adminDAO = new AdminDAO();
        adminDAO.editFaculty(faculty.getFacultyId(), faculty.getName());
    }

    public void getinfo() {
        System.out.println("university is :  " + university.getName() + " universityid is : " + university.getUniversityId());
    }

    public void universityChange(ValueChangeEvent e) {
        university = (University) e.getNewValue();
        FacesContext.getCurrentInstance().renderResponse();
    }
}

والكود الآتى هو مابه المشكله حيث ان

Faculty.university و Faculty.university.name و Faculty.university.universityId دائما ب null ولا استطيع ان استخمها او اراها داخل اى dialog

مع العلم ان   name,  universityId هى ال properties  للكلاس university

<h:form id="univerityForm">
                        <h:panelGrid columns="2" cellspacing="6" cellpadding="6">
                            <h:outputText value="Select University  " style="size: 3; font-weight: bold;"/>
                            <p:selectOneMenu id="university" value="#{facultyMB.university}">
                                <f:selectItems value="#{facultyMB.universities}"  var="university" itemLabel="#{facultyMB.university.name}" />
                                <f:ajax listener="#{facultyMB.universityChange}"/>
                            </p:selectOneMenu>
                        </h:panelGrid>

                    </h:form>

                    <h:panelGrid columns="2" cellspacing="6" cellpadding="6">
                        <p:commandButton value="add" icon="ui-icon-plus"
                                         onclick="uniCreateDialogWidget.show();"
                                         style="font-size: .6em; font-style: italic; width: 40px; hight: .3px">
                        </p:commandButton>
                        <p:commandButton value="edit" icon="ui-icon-plus"
                                         onclick="uniEditDialogWidget.show();"
                                         style="font-size: .6em; font-style: italic; width: 40px; hight: .3px">
                            <f:setPropertyActionListener target="#{facultyMB.university}" value="#{university}" />
                        </p:commandButton>
                    </h:panelGrid>

وهذا هو dialog page

وهنا ال vlaue

facultyMB.university.name

لا ترجع بشئ ودائما تاتى معى ب null

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:p="http://primefaces.org/ui">
    <h:body>
        <p:dialog widgetVar="uniEditDialogWidget" id="uniEditDialogId"
                  height="150" width="500" modal="true" closable="true"
                  draggable="false" resizable="false">
            <h:form id="uniEditDialogForm" prependId="false">
                <h:panelGrid columns="2">
                    <h:outputText value="University Name" />
                    <h:inputText value="#{facultyMB.university.name}" required="true"
                                 label="University Name">
                        <f:validateLength minimum="4" />
                    </h:inputText>

                    <p:commandButton value="edit" icon="ui-icon-plus"
                                     action="#{facultyMB.editUniversity()}"
                                     
                                     oncomplete="closeDialogIfSucess(xhr, status, args, uniEditDialogWidget, 'uniEditDialogId')" />
                    <p:commandButton value="delete" 
                                     action="#{facultyMB.deleteUniversity()}"
                                     
                                     oncomplete="closeDialogIfSucess(xhr, status, args, uniEditDialogWidget, 'uniEditDialogId')" />
                    <p:commandButton value="cancel" icon="ui-icon-cancel"
                                     onclick="uniEditDialogWidget.hide();" type="button" />
                </h:panelGrid>
            </h:form>
        </p:dialog>
    </h:body>
</html>

ارجو المساعده

وشكرا للجروب الجميل