Program: 102435
Project: 102435
Buggy source:
/** 
 * Get the activityStream's information related to the activity.
 * @param authentiatedUsed the viewer
 * @param activity
 * @param target the owner of the stream that we want to display
 * @return activityStream object, null if the viewer has no permission to view activity
 */
public static DataEntity getActivityStream(ExoSocialActivity activity,Identity authentiatedUsed){
  DataEntity as=new DataEntity();
  IdentityManager identityManager=CommonsUtils.getService(IdentityManager.class);
  Identity owner=identityManager.getOrCreateIdentity(OrganizationIdentityProvider.NAME,activity.getStreamOwner(),true);
  if (owner != null) {
    Relationship relationship=CommonsUtils.getService(RelationshipManager.class).get(authentiatedUsed,owner);
    if (!authentiatedUsed.getId().equals(activity.getPosterId()) && !authentiatedUsed.getRemoteId().equals(activity.getStreamOwner()) && (relationship == null || !relationship.getStatus().equals(Relationship.Type.CONFIRMED))&& !RestUtils.isMemberOfAdminGroup()) {
      return null;
    }
    as.put(RestProperties.TYPE,USER_ACTIVITY_TYPE);
  }
 else {
    SpaceService spaceService=CommonsUtils.getService(SpaceService.class);
    owner=identityManager.getOrCreateIdentity(SpaceIdentityProvider.NAME,activity.getStreamOwner(),true);
    Space space=spaceService.getSpaceByPrettyName(owner.getRemoteId());
    if (!spaceService.isMember(space,authentiatedUsed.getRemoteId())) {
      return null;
    }
    as.put(RestProperties.TYPE,SPACE_ACTIVITY_TYPE);
  }
  as.put(RestProperties.ID,owner.getRemoteId());
  return as;
}

Fixed version (ground truth):
/** 
 * Get the activityStream's information related to the activity.
 * @param authentiatedUsed the viewer
 * @param activity
 * @param target the owner of the stream that we want to display
 * @return activityStream object, null if the viewer has no permission to view activity
 */
public static DataEntity getActivityStream(ExoSocialActivity activity,Identity authentiatedUsed){
  DataEntity as=new DataEntity();
  IdentityManager identityManager=CommonsUtils.getService(IdentityManager.class);
  Identity owner=identityManager.getOrCreateIdentity(OrganizationIdentityProvider.NAME,activity.getStreamOwner(),true);
  if (owner != null) {
    Relationship relationship=CommonsUtils.getService(RelationshipManager.class).get(authentiatedUsed,owner);
    if (!authentiatedUsed.getId().equals(activity.getPosterId()) && !authentiatedUsed.getRemoteId().equals(activity.getStreamOwner()) && (relationship == null || !relationship.getStatus().equals(Relationship.Type.CONFIRMED))&& !RestUtils.isMemberOfAdminGroup()) {
      return null;
    }
    as.put(RestProperties.TYPE,USER_ACTIVITY_TYPE);
  }
 else {
    SpaceService spaceService=CommonsUtils.getService(SpaceService.class);
    owner=identityManager.getOrCreateIdentity(SpaceIdentityProvider.NAME,activity.getStreamOwner(),true);
    Space space=spaceService.getSpaceByPrettyName(owner.getRemoteId());
    if (space == null || !spaceService.isMember(space,authentiatedUsed.getRemoteId())) {
      return null;
    }
    as.put(RestProperties.TYPE,SPACE_ACTIVITY_TYPE);
  }
  as.put(RestProperties.ID,owner.getRemoteId());
  return as;
}