sereializing and deserializing a hashmap

[danny sarge]

Hey, I've been trying to serialize and deserialize a HashMap<integer,integer> that has one entry (1,1). but the entry seems to vanish after the serialization and deserialization. this is my code, it returns "true, false":</integer,integer>

public static void main(String[] args) { // serialize
        JSONSerializer serializer = new JSONSerializer();
        JSONDeserializer<Map<Integer, Integer>> deserializer = new JSONDeserializer<Map<Integer, Integer>>();

        Map<Integer, Integer> tempMap = new HashMap<Integer, Integer>();
        tempMap.put(1, 1);
        String jsonStr = serializer.serialize(tempMap);
        Map<Integer, Integer> tempMap2 = deserializer.deserialize(jsonStr);
        System.out.println(tempMap.containsKey(1));
        System.out.println(tempMap2.containsKey(1));        
    }

Thanks! :)

[Charlie Hubbard]

So this is a limitation of JSON standard. JSON standard only allows for strings in the key of objects. So you're creating a Map<integer,integer> which is effectively getting converted to Map<string,integer>. When that is deserialized you're getting a Map<string,integer> which you try to look up a Integer value of 1 which isn't there. If you looked up "1" you'd find your Integer 1 value.</string,integer></string,integer></integer,integer>