CompatibleFieldSerializer does not work

[Guofeng Zhang]

Hi,

I tried to use CompatibleFieldSerializer, but it failed, I cannot figure out how to solve it.

For the following test, if I use

   kryo.writeObject(output, outerObject);

I got  

Exception in thread "main" com.esotericsoftware.kryo.KryoException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Class

Serialization trace:

clazz (app.SomeClass)

someObject (app.OuterClass)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:101)

at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:62)

at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:552)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:80)

at com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:518)

at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:534)

at app.KyroTest.outputTest(KyroTest.java:42)

at app.KyroTest.main(KyroTest.java:14)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Class

at com.esotericsoftware.kryo.serializers.DefaultSerializers$ClassSerializer.write(DefaultSerializers.java:314)

at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:606)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:87)

... 12 more

If I use

   kryo.writeObject(output, someObject);

I got    

Exception in thread "main" com.esotericsoftware.kryo.KryoException: java.lang.NullPointerException

Serialization trace:

annotations (app.SomeClass$SKU)

skus (app.SomeClass)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:101)

at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:62)

at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:606)

at com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:93)

at com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:40)

at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:552)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:80)

at com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:518)

at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:534)

at app.KyroTest.outputTest(KyroTest.java:43)

at app.KyroTest.main(KyroTest.java:14)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Caused by: java.lang.NullPointerException

at com.esotericsoftware.kryo.Kryo.writeReferenceOrNull(Kryo.java:642)

at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:593)

at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:87)

... 15 more

The attached is the source.

Thanks for your help very much.

Guofeng