com.alibaba.fastjson.parser.deserializer

Interface ObjectDeserializer

All Known Subinterfaces:

AutowiredObjectDeserializer

All Known Implementing Classes:

AbstractDateDeserializer, AtomicCodec, AwtCodec, BigDecimalCodec, BigIntegerCodec, BooleanCodec, ByteBufferCodec, CalendarCodec, CharacterCodec, CharArrayCodec, CollectionCodec, ContextObjectDeserializer, DateCodec, EnumCreatorDeserializer, EnumDeserializer, FloatCodec, GuavaCodec, IntegerCodec, JavaBeanDeserializer, JavaObjectDeserializer, Jdk8DateCodec, JodaCodec, JSONPDeserializer, LongCodec, MapDeserializer, MiscCodec, MonetaCodec, NumberDeserializer, ObjectArrayCodec, OptionalCodec, PropertyProcessableDeserializer, ReferenceCodec, SqlDateDeserializer, StackTraceElementDeserializer, StringCodec, ThrowableDeserializer, TimeDeserializer

public interface ObjectDeserializer

Interface representing a custom deserializer for Json. You should write a custom deserializer, if you are not happy with the default deserialization done by Gson. You will also need to register this deserializer through ParserConfig.putDeserializer(Type, ObjectDeserializer).

 public static enum OrderActionEnum {
     FAIL(1), SUCC(0);
 
     private int code;
 
     OrderActionEnum(int code){
         this.code = code;
     }
 }
 
 public static class OrderActionEnumDeser implements ObjectDeserializer {
     
     public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
         Integer intValue = parser.parseObject(int.class);
         if (intValue == 1) {
             return (T) OrderActionEnum.FAIL;
         } else if (intValue == 0) {
             return (T) OrderActionEnum.SUCC;
         }
         throw new IllegalStateException();
     }
 
     
     public int getFastMatchToken() {
         return JSONToken.LITERAL_INT;
     }
 }
 

You will also need to register OrderActionEnumDeser to ParserConfig:

 ParserConfig.getGlobalInstance().putDeserializer(OrderActionEnum.class, new OrderActionEnumDeser());
 

Method Summary

Modifier and Type	Method and Description
<T> T	deserialze(DefaultJSONParser parser, Type type, Object fieldName) fastjson invokes this call-back method during deserialization when it encounters a field of the specified type.
int	getFastMatchToken()

Method Detail

deserialze

<T> T deserialze(DefaultJSONParser parser,
                 Type type,
                 Object fieldName)

fastjson invokes this call-back method during deserialization when it encounters a field of the specified type.

In the implementation of this call-back method, you should consider invoking JSON.parseObject(String, Type, Feature[]) method to create objects for any non-trivial field of the returned object.

Parameters:

parser - context DefaultJSONParser being deserialized

type - The type of the Object to deserialize to

fieldName - parent object field name

Returns:

a deserialized object of the specified type which is a subclass of T

getFastMatchToken

int getFastMatchToken()