Set bulkDelete's parameters to be non null

wizard-server/src/main/java/org/cobbzilla/wizard/dao/AbstractCRUDDAO.java

@@ -341,7 +341,7 @@ public abstract class AbstractCRUDDAO<E extends Identifiable>
     public static final String EX_UUID = "__exclude_uuid__";
 
     private int bulkDelete(String field, Object value, boolean notUuid) {
-        if (value == null) return bulkDeleteWhere(field + " IS NULL", null);
+        if (value == null) return bulkDeleteWhere(field + " IS NULL", new HashMap<>());
 
         if (notUuid) {
             final var params = new HashMap<String, Object>();
@@ -353,11 +353,11 @@ public abstract class AbstractCRUDDAO<E extends Identifiable>
         return bulkDeleteWhere(field + " = :" + field, new SingletonMap(field, value));
     }
 
-    public int bulkDeleteWhere(@NonNull final String whereClause, @Nullable final Map<String, Object> parameters) {
+    public int bulkDeleteWhere(@NonNull final String whereClause, @NonNull final Map<String, Object> parameters) {
         final Session session = getHibernateTemplate().getSessionFactory().getCurrentSession();
         final String deleteSql = "DELETE FROM " + getEntityClass().getSimpleName() + " WHERE " + whereClause;
         final Query query = session.createQuery(deleteSql);
-        if (!empty(parameters)) parameters.forEach(query::setParameter);
+        parameters.forEach(query::setParameter);
         final int count = query.executeUpdate();
         session.setFlushMode(FlushMode.COMMIT);
         session.flush();