always got data model update error when enum happens in data

[ellenzhao]

I am modifying the booking example code and added a enum type Gender to the type User. Since then, registration never succeeded. Always got this message:

"verify": Error during model data update.

The code in the xhtml file:

<div class="entry">
 <div class="label"><h:outputLabel for="gender">Gender:</h:outputLabel></div>
 <div class="input"><s:decorate>
 <h:selectOneMenu id="gender" value="#{user.gender}"
 required="true">
 <f:selectItem itemLabel="female" itemValue="0" />
 <f:selectItem itemLabel="male" itemValue="1" />
 </h:selectOneMenu>
 <br />
 </s:decorate></div>
 </div>

And the enum type happens in the User class, but not any backing beans.

Any solution/enlightenment would be highly appreciated.


Best Regards,
Ellen

[gavin.king]

I suppose you need to use a JSF Converter.

[ellenzhao]

Voila! Thanks for the hint and now it is working perfectly.

My solution is based on hotchai's solution here:

http://jroller.com/page/hotchai?entry=jsf_converter_for_jdk_1

(I am using Seam 1.1 beta 2 and all the example source code are from Seam 1.1 beta 2 as well)

The EnumConverter class can be used as it is, no need to modify and it simply works.

Here is my Enum classes:

public class User implements Serializable {
 // same as the booking sample
 public static enum Gender{
 FEMALE("female"), MALE("male");
 private String label;

 Gender(String label){
 this.label = label;
 }

 public String getLabel(){
 return this.label;
 }
 }

 public static enum Title {
 DR("Dr."), MS("Ms."), MR("Mr."), MRS("Mrs.");
 private String label;

 Title(String label) {
 this.label = label;
 }

 public String getLabel() {
 return this.label;
 }
 }
}

here is the code from backing bean:

@Stateful
@Scope(EVENT)
@Name("register")
public class RegisterBacking implements Register {
 //...
 private SelectItem[] titleItems;
 private SelectItem[] genderItems;

//... same as the booking example
public SelectItem[] getTitleItems() {
 this.titleItems = new SelectItem[Title.values().length];
 int i = 0;
 for (Title t : Title.values()) {
 this.titleItems[i++] = new SelectItem(t, t.getLabel());
 }
 return this.titleItems;
 }

 public SelectItem[] getGenderItems() {
 this.genderItems = new SelectItem[Gender.values().length];
 int i = 0;
 for (Gender g : Gender.values()) {
 this.genderItems[i++] = new SelectItem(g, g.getLabel());
 }
 return this.genderItems;
 }
}

The code in register.xhtml:

<div class="entry">
 <div class="label"><h:outputLabel for="title">Title:</h:outputLabel></div>
 <div class="input"><s:decorate>
 <h:selectOneMenu id="title" value="#{guest.title}" required="true">
 <f:selectItems value="#{register.titleItems}" />
 </h:selectOneMenu>
 <br />
 </s:decorate></div>
 </div>

<div class="entry">
 <div class="label"><h:outputLabel for="gender">Gender:</h:outputLabel></div>
 <div class="input"><s:decorate>
 <h:selectOneMenu id="gender" value="#{guest.gender}"
 required="true">
 <f:selectItems value="#{register.genderItems}" />
 </h:selectOneMenu>
 <br />
 </s:decorate></div>
 </div>