我正在为ForeignCollection类编写一个反序列化器,它是抽象的,并在
ORMLite Android Library中提供给我.请参阅下面的代码.
public class ForeignCollectionDeserializer implements JsonDeserializer<ForeignCollectionDeserializer> { @Override public ForeignCollection deserialize(JsonElement jsonElement,Type type,JsonDeserializationContext jsonDeserializationContext) throws JsonParseException { ... } }
我也尝试过实现JsonDeserializer<?>和JsonDeserialzer(没有泛型类型)
我正在使用GsonBuilder.registerTypeAdapter来注册反序列化器.
GsonBuilder gb = new GsonBuilder(); gb.registerTypeAdapter(ForeignCollection.class,new ForeignCollectionDeserializer()); Gson gson = gb.create();
但是,registerTypeAdapter()抛出这个:
06-11 11:27:27.937: E/AndroidRuntime(15197): FATAL EXCEPTION: main 06-11 11:27:27.937: E/AndroidRuntime(15197): Process: com.myapp,PID: 15197 06-11 11:27:27.937: E/AndroidRuntime(15197): java.lang.IllegalArgumentException 06-11 11:27:27.937: E/AndroidRuntime(15197): at com.google.gson.internal.$Gson$Preconditions.checkArgument($Gson$Preconditions.java:42) 06-11 11:27:27.937: E/AndroidRuntime(15197): at com.google.gson.GsonBuilder.registerTypeAdapter(GsonBuilder.java:448)
我正在逐步完成代码,然后从GsonBuilder下面找到令人讨厌的部分.
public GsonBuilder registerTypeAdapter(Type type,Object typeAdapter) { $Gson$Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?> || typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?> || typeAdapter instanceof TypeAdapter<?>); if (typeAdapter instanceof InstanceCreator<?>) { instanceCreators.put(type,(InstanceCreator) typeAdapter); }
我评估了typeAdapter instanceof JsonDeserializer<?>在调试模式下,发现它实际上是假的
其实我已经评估了所有这些:
> typeAdapter instanceof JsonDeserializer
> typeAdapter instanceof JsonDeserializer< ForeignCollection>
> typeAdapter instanceof JsonDeserializer<?>
他们都是假的.
这是怎么回事,当我将typeAdapter声明为ForeignCollectionsDeserializer类型的Object时,它实现了JsonDeserializer?