1 Reply Latest reply on Feb 15, 2009 2:06 AM by fsommavilla

jpaPermissionStore causes NPE (from seamspace example)

fsommavilla Feb 13, 2009 8:25 PM

Hi,
I've tried to implement the same permission managment as seam example Seamspace. The declaration of the permission manager component, in my components.xml is as follow:

<security:permission-manager permission-store="#{org.jboss.seam.security.jpaPermissionStore}" />

To retrieve available action i call permissionMnager.listAvailableActions(target); like the example:

public List<String> getAvailableActions() {
     return permissionManager.listAvailableActions(target);
}

target is initialize before in the createPermission method and not null:

@SuppressWarnings("unchecked")
@Begin(nested = true)
public void createPermission() {
     target = (Application) permissionSearch.getTarget();
     selectedUsers = new ArrayList<User>();

     availableUsers = entityManager.createQuery("from UserAccount ua where ua.enabled = true").getResultList();
}

And get the following stack trace :

javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean; nested exception is: java.lang.NullPointerException
java.lang.NullPointerException
     at org.jboss.seam.security.permission.JpaPermissionStore.listAvailableActions(JpaPermissionStore.java:765)
     at org.jboss.seam.security.permission.PermissionManager.listAvailableActions(PermissionManager.java:132)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)

Any help ?

Thank you,

Fabrice

1. Re: jpaPermissionStore causes NPE (from seamspace example)

fsommavilla Feb 15, 2009 2:06 AM (in response to fsommavilla)
Well after investigation the NPE appears at this line in the createPermission() method:

target = (Application) permissionSearch.getTarget();

I've declare the permissionSearch in my components.xml file this way:

<component name="permissionSearch" auto-create="true" scope="CONVERSATION" class="org.jboss.seam.security.permission.action.PermissionSearch"> </component>

The NPE is pointed on the getTarget() method.

What is the reason ? why getTarget() does not retrieve the Object ?

Any help ?

thx
Actions