temporary deserializer ##spring ##java ##deserializer

TempDeserializer.java

public class AnimalDeserializer extends StdDeserializer<Animal>
{
    @Autowired
    ObjectMapper mapper;

    public AnimalDeserializer( Class<?> vc, ObjectMapper mapper )
    {
        super( vc );
        this.mapper = mapper;
    }

    public AnimalDeserializer()
    {
        this( null );
    }

    public AnimalDeserializer( Class<?> vc )
    {
        super( vc );
    }

    @Override
    public Animal deserialize( JsonParser jsonParser, DeserializationContext deserializationContext ) throws IOException
    {
//        JsonNode requestNode = mapper.readValue( jsonParser, JsonNode.class );
        JsonNode requestNode = jsonParser.getCodec().readTree(jsonParser);
        if( requestNode.has( "type" ) )
        {
            String key = requestNode.get( "type" ).asText();

            if( !StringUtils.isEmpty( key ) )
            {
                if( key.equals( "DOG" ) )
                {
                    String dogId = "";
                    if (requestNode.has( "dogId" ) && !StringUtils.isEmpty( requestNode.get( "dogId" ).asText()))
                        dogId = requestNode.get( "dogId" ).asText();
                    return new Dog(dogId);
                }

                else if( key.equals( "CAT" ) )
                {
//                    return mapper.treeToValue( requestNode, Tiger.class );
                    String catCode = "";
                    if (requestNode.has( "catCode" ) && !StringUtils.isEmpty( requestNode.get( "catCode" ).asText()))
                        catCode = requestNode.get( "catCode" ).asText();
                    return new Cat(catCode);
                }
            }
        }
        return null;
    }

}