Map XmlAdapter

MapAdapter.java

    public class MapAdapter extends XmlAdapter<MapAdapter.MapLike, Map<String, String>> {

        public static class Entry {
            public String value;
            public String key;
            public Entry() {}
            public Entry(String value, String key) {}
        }

        public static class MapLike {
            public List<MapAdapter.Entry> entry;
        }

        @Override
        public Map<String, String> unmarshal(MapLike v) throws Exception {
            Map<String, String> map = new HashMap<>();
            for (Entry entry: v.entry) {
                map.put(entry.key, entry.value);
            }
            return map;
        }

        @Override
        public MapLike marshal(Map<String, String> v) throws Exception {
            MapLike mapLike = new MapLike();
            mapLike.entry = new ArrayList<>();
            for (Map.Entry<String, String> entry: v.entrySet()) {
                mapLike.entry.add(new Entry(entry.getKey(), entry.getValue()));
            }
            return mapLike;
        }
    }