Question

I am trying to implement a simple authorization strategy for my Wicket application. I am implemented my own AuthorizationStrategy (extending IAuthorizationStrategy).

http://old.nabble.com/Authorization-strategy-help-td18948597.html
After reading the above link, I figured it makes more sense to use metadata-driven authorization than one using Annotations.

So I have a simple RoleCheck class

public class RoleCheck {

 private String privilege;

 public RoleCheck(String priv) {
  this.privilege = priv;
 }

 public void setPrivilege(String privilege) {
  this.privilege = privilege;
 }

 public String getPrivilege() {
  return privilege;
 }
}

I add it a component:

public static MetaDataKey<RoleCheck> priv = new MetaDataKey<RoleCheck>() {};
editLink.setMetaData(priv, new RoleCheck("Update"));

And in my Authorization Strategy class, I try to get the metadata associated with the component:

public boolean isActionAuthorized(Component component, Action action) {
  if (action.equals(Component.RENDER)) {
      RoleCheck privCheck = (RoleCheck) component.getMetaData(EditControlToolBar.priv);
      if (privCheck != null) {
           ...
      }
}

However the getMetaData gives an error

“Bound mismatch: The generic method getMetaData(MetaDataKey<M>) of
type Component is not applicable for the arguments
(MetaDataKey<RoleCheck>). The inferred type RoleCheck is not a
valid substitute for the bounded parameter “

Any help would be appreciated. Thank you

Answer 1

Your RoleCheck class should implement Serializable.

And are you using Wicket 1.4 ? In which case I’d suggest proceeding this way :

public class RolePermissionKey extends MetaDataKey<RoleCheck> {
    public static final RolePermissionKey KEY = new RolePermissionKey();
}

To add it to a componenet :

editLink.setMetaData(RolePermissionKey.KEY, new RoleCheck("Update"));

And to perform the authorization :

RoleCheck privCheck = component.getMetaData(RolePermissionKey.KEY)