Deprecated hasRecords, added isEmpty and isNotEmpty and fixed performance issues with them by setting limit(1)

Author: JanHolger

src/main/java/org/javawebstack/orm/query/Query.java

@@ -464,8 +464,17 @@ public int count() {
         }
     }
 
+    @Deprecated
     public boolean hasRecords() {
-        return count() > 0;
+        return isNotEmpty();
+    }
+
+    public boolean isNotEmpty() {
+        return limit(1).count() > 0;
+    }
+
+    public boolean isEmpty() {
+        return !isNotEmpty();
     }
 
 }