how to get the Map from claims during parsing?

I have set-up custom claims as map during jwt generation. when decoding jwt, I want to retrieve the map.

I am trying to do this;

 Jws<Claims> jwsClaims = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token);
 Claims claims = jwsClaims.getBody();

how to get Map<String,Object> from claims?

This is how I set custom claims

Jwts.builder()
                .setClaims(getMapFromResponseObject(myObj))
                .setIssuedAt(now)
                .setExpiration(expiration)
                .setIssuer(ISSUER)
                .signWith(SignatureAlgorithm.HS512, secretKey)
                .compact();


private Map<String,Object> getMapFromResponseObject(MyObject myObj){
        ObjectMapper m = new ObjectMapper();
        Map<String,Object> props = m.convertValue(myObj, Map.class);
        return props;
    }

[eric-taix]

As @dogeared said just use JwtBuilder#claim method :

Map<String,Person> serializedObjects = myMapper.serialize(myObjectsToConvert);  
Jwts.builder()  
                .claim("myPrivateClaimKey", serializedObjects)  
                .setIssuedAt(now)  
                .setExpiration(expiration)  
                .setIssuer(ISSUER)  
                .signWith(SignatureAlgorithm.HS512, secretKey)  
                .compact();

The JSON representation will be:

{
  "iss": "ISSUER"
  ...
  "myPrivateClaimKey": {
    "hello": {
      "name": "xxxx"
    },
    "world": {
      "name": "yyyy"
    }
  }
}

When you deserialize the Jwt body, just get “myPrivateClaimKey”:

Object serializedObjects = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody().get("myPrivateClaimKey");  
Object objects = myMapper.deserialize(serializedObjects);

Does it make sense?

[sridhar1982]

Just as I cited above.

Map<String,Person> map = new HasMap<>();
map.put("hello", new Person("hello"));
map.put("world", new Person("world");

Jwts.builder()
                .setClaims(map)
                .setIssuedAt(now)
                .setExpiration(expiration)
                .setIssuer(ISSUER)
                .signWith(SignatureAlgorithm.HS512, secretKey)
                .compact();

now when I parse, I would like to get back the map which i set as claims i.e Map<String,String> map = (Map<String,String>) claims;

The claims by itself contains expiration, iss, subject etc which I do not want. Just the map which I set as claims. The reason I ask this, I have a mapper which coverts this map to java object and vice-versa.