Path: csiph.com!x330-a1.tempe.blueboxinc.net!feeder1.hal-mli.net!nx02.iad01.newshosting.com!newshosting.com!novia!news-out.readnews.com!transit3.readnews.com!postnews.google.com!l36g2000vbp.googlegroups.com!not-for-mail
From: stunaz <stunaz@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Problems with WebDataBinder and Set.Class
Date: Wed, 20 Apr 2011 19:13:58 -0700 (PDT)
Organization: http://groups.google.com
Lines: 109
Message-ID: <ba167ebb-d07e-4672-bbc5-8936f9c87fca@l36g2000vbp.googlegroups.com>
NNTP-Posting-Host: 76.69.234.238
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: posting.google.com 1303352039 20129 127.0.0.1 (21 Apr 2011 02:13:59 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 21 Apr 2011 02:13:59 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: l36g2000vbp.googlegroups.com; posting-host=76.69.234.238; posting-account=-FSIfAoAAADL7WRV0exwpmcOiKwrynQm
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16,gzip(gfe)
Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:3172

Hello everyone, i am having trouble with binding my data from a form :
I have two class

@Entity
@Table(name = "ROLES")
public class Role implements GenericDomain {

private Long    id;
private String  code;
private String  name;

private Set<Privilege> privileges = new HashSet<Privilege>(0);

public Role() {}

/* getter and setter*/

@ManyToMany(cascade=CascadeType.ALL)
@JoinTable(name = "ROLES_PRIVILEGES"
    , joinColumns = { @JoinColumn(name = "ROLE_ID") }
    , inverseJoinColumns = { @JoinColumn(name = "PRIVILEGE_ID") }
)

public Set<Privilege> getPrivileges() {
    return this.privileges;
}
public void setPrivileges(Set<Privilege> privileges) {
    this.privileges = privileges;
}
    /*  overide of hascode, equals*/
}
And

@Entity
@Table(name = "PRIVILEGES")
public class Privilege implements GenericDomain {

private Long    id;
private String  code;

private Set<Role> roles = new HashSet<Role>(0);

public Privilege() {}

 /* getter and setter*/

 @ManyToMany(cascade=CascadeType.REFRESH, mappedBy="privileges")
public Set<Role> getRoles() {
    return this.roles;
}
public void setRoles(Set<Role> roles) {
    this.roles = roles;
}
@Override
public String toString(){
    return this.getCode() + this.getComment();
    }

/*overide equals and hascode*/
and in my controller i have :

    @InitBinder
public void initBinder(WebDataBinder binder) {

   binder.registerCustomEditor(Set.class, "privileges", new
CustomCollectionEditor(Set.class) {
       @Override
       protected Object convertElement(Object element) {
            return (element == null)?
null:privilegeService.getOne(Integer.parseInt((String)element));
        }
    });
}
    @RequestMapping(value = "edit", method = RequestMethod.POST)
public String saveOldRole(  @ModelAttribute("role") Role role
                            , BindingResult result
                            , ModelMap model
                        ) {

    validator.validate(role, result);
    if (result.hasErrors()){
        logger.error(result.getAllErrors());
        model.addAllAttributes(result.getModel());
        return "/admin/role/edit";
    }
    logger.info(role.getPrivileges());
    Iterator p = role.getPrivileges().iterator();
    while(p.hasNext()){
        logger.info(p.next().getClass());
    }
    roleService.saveOrUpdate(role);
    model.addAttribute("roles", roleService.getAll());
    sessionStatus.setComplete();
    return "redirect:/admin/role/list.do";
}
and my debug is

role.RoleController:93 - [[MANAGE_USERS], [MANAGE_ROLES]]
role.RoleController:96 - class java.util.LinkedHashSet
role.RoleController:96 - class java.util.LinkedHashSet
22:29:44,915 ERROR tomcat-http--7 property.BasicPropertyAccessor:194 -
IllegalArgumentException in class: com.stunaz.domain.Privilege, getter
method of property: id
I dont understand why at 96, the class type is
java.util.LinkedHashSet, i thought it should be Privileges. I dont
understand why my role.getPrivileges() is a Set of Set, it should be a
Set of Privilege.

Of course at saveOrUpdate am getting an error.