Getting exception while Retreving the history identityLinks

[sai576]

I am getting Null Pointer Exception while trying to retreving the history identityLinks in the following way.

HistoricIdentityLinkEntityManager historicIdentityLinkEntityManager=new HistoricIdentityLinkEntityManager();
List<HistoricIdentityLinkEntity> identityLinks=historicIdentityLinkEntityManager.
                                                                                  findHistoricIdentityLinksByTaskId(taskId);//Getting NullPointer Exception

for (HistoricIdentityLinkEntity identityLink: identityLinks)
{
    if(identityLink.getType().equals(IdentityLinkType.CANDIDATE))
    {
      List<Group> groups = identityService.createGroupQuery().groupId(identityLink.getGroupId()).list();
   for(Group group : groups)
   {
      System.out.println("group==>"+group.getId());
   }
   }
}

Whatever i am passing taskId that is present in table.I checked that one also.If anything mistake in my code tell me where did i mistaken.

Thanks &Regards
Sai Kumar R

[sai576]

Anyone could help regarding above one.

[trademak]

You are using an internal class and just instantiate it and think you can just use it?
We offer an API via the HistoryService to work with historic data. Please use that entry point.

Best regards,