How to annotate enum fields for deserialization using Jackson json

Question

I am using REST web service/Apache Wink with Jackson 1.6.2. How do I annotate an enum field so that Jackson deserializes it?

Inner class

public enum          


        

Answer 1

don't annotate them, just configure your ObjectMapper instance:

private ObjectMapper createObjectMapper() {
    final ObjectMapper mapper = new ObjectMapper();
    // enable toString method of enums to return the value to be mapped
    mapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
    mapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
    return mapper;
}

and in your enum override the toString() method:

public enum SectionType {
START("start"),
MORE("more");

    // the value which is used for matching
    // the json node value with this enum
    private final String value;

    SectionType(final String type) {
        value = type;
    }

    @Override
    public String toString() {
        return value;
    }
}

You don't need any annotations or custom deserializers.