complex data structures

In the jUnit tests, morphium is tested to support those complex data structure, like lists of lists, lists of maps or maps of lists of entities. I think, you'll get the picture:

  public static class CMapListObject extends MapListObject {
        private Map<String, List<EmbObj>> map1;
        private Map<String, EmbObj> map2;
        private Map<String, List<String>> map3;
        private Map<String, List<EmbObj>> map4;

        private Map<String, Map<String, String>> map5;
        private Map<String, Map<String, EmbObj>> map5a;
        private Map<String, List<Map<String, EmbObj>>> map6a;

        private List<Map<String, String>> map7;
        private List<List<Map<String, String>>> map7a;
        ....

All those are tested in JUnit and can be stored and read accordingly...