How to write ArrayMap to JSON?

[ReBirth]

This ArrayMap in question is libgdx's. I tried this,

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text: {             class: map,             "3": "Once upon a time, there are 3 bees",             "4": "One of them was so ugly, so the other two died",             "5": "Left alone, the ugly bee suicided",             "6": "THE END"          }

My goal is only to read Map with both String key-value pair. "text" is a ArrayMap<String, String> field and "map" is class tag for ArrayMap.class.

[meingrosserfreundjo]

I'm not sure that i fully understand what you are trying to accomplish but you could do

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text: {   class: "map",   entries: {     "3": "Once upon a time, there are 3 bees",     "4": "One of them was so ugly, so the other two died",     "5": "Left alone, the ugly bee suicided",     "6": "THE END"   } }

You could then read the Class Property as normal Text-Value (Maybe use the real Class name -> could use Reflection to instanciate) and the entries as Map-Object, where you can then iterate over the Content and fill your ArrayMap Object with the Keys and Values.

[Nate]

The Json class can automatically serialize to/from POJOs, OrderedMap, Array, String, Float, and Boolean. It doesn't know ArrayMap, so will treat it like a POJO, which isn't quite what you want. In this case you'll need to write a serializer that knows how to read/write ArrayMaps:

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static public void main (String[] args) throws Exception {    Json json = new Json();    json.setSerializer(ArrayMap.class, new Json.Serializer<ArrayMap>() {       public void write (Json json, ArrayMap map, Class knownType) {          Object[] keys = map.keys;          Object[] values = map.values;          json.writeObjectStart();          for (int i = 0, n = map.size; i < n; i++)             json.writeValue(keys[i].toString(), values[i]);          json.writeObjectEnd();       }       public ArrayMap read (Json json, Object jsonData, Class type) {          ArrayMap map = new ArrayMap();          for (Entry entry : ((OrderedMap<?, ?>)jsonData).entries())             map.put(entry.key, entry.value);          return map;       }    });    json.addClassTag("map", ArrayMap.class);    ArrayMap map = new ArrayMap();    map.put("3", "Once upon a time, there are 3 bees");    map.put("4", "One of them was so ugly, so the other two died");    map.put("5", "Left alone, the ugly bee suicided");    map.put("6", "THE END");    String text = json.toJson(map);    System.out.println(json.prettyPrint(text));    ArrayMap map2 = json.fromJson(ArrayMap.class, text);    System.out.println(map2); }

If your "text" fields was an OrderedMap instead of ArrayMap, you wouldn't have to do this (but of course these two map implementations are quite different).