json custom and conditional deserializing

Problem : Need to conditionaly deserialize to string or object based on the incoming json feed :

    @JsonDeserialize(using = LocationDeserializer.class)
    public void setLocation(Location location) {

And the custom Deserializer looks Like

@Override
    public Location deserialize(JsonParser jp, DeserializationContext ctxt)
            throws IOException, JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setDeserializationConfig(ctxt.getConfig());
        jp.setCodec(mapper);
        String city = null;
        Location location = null;
        if(jp.getCurrentToken() == JsonToken.VALUE_STRING) {
           city = jp.readValueAs(String.class);
           location = new Location();
           location.setCity(city);
        } else {
           location = jp.readValueAs(Location.class);
        }
        return location;
    }