Cannot serialise enums with anonymous classes

[willtemperley]

Why are enums with anonymous classes are not supported? I have an enum which is composed of constants, some of which are anonymous classes, which I would like to serialise. Even with a custom encoder this is not possible. It should be incredibly easy to serialise an enum, i.e. it just needs to be a string in the serialisation, surely?

Enums constants without an anonymous class work fine on the same class (x.y.z.Symbol)

The exception:

com.jsoniter.spi.JsonException: anonymous class not supported: class x.y.z.Symbol$2

	at com.jsoniter.spi.TypeLiteral.generateCacheKey(TypeLiteral.java:96)
	at com.jsoniter.spi.TypeLiteral.generateDecoderCacheKey(TypeLiteral.java:84)
	at com.jsoniter.spi.TypeLiteral.createNew(TypeLiteral.java:180)
	at com.jsoniter.spi.TypeLiteral.create(TypeLiteral.java:170)
	at com.jsoniter.spi.Config.getEncoderCacheKey(Config.java:65)
	at com.jsoniter.output.JsonStream.writeVal(JsonStream.java:361)
	at com.jsoniter.output.ReflectionObjectEncoder.writeEncodeTo(ReflectionObjectEncoder.java:121)
	at com.jsoniter.output.ReflectionObjectEncoder.enocde_(ReflectionObjectEncoder.java:78)
	at com.jsoniter.output.ReflectionObjectEncoder.encode(ReflectionObjectEncoder.java:37)
	at com.jsoniter.output.JsonStream.writeVal(JsonStream.java:381)
	at com.jsoniter.output.JsonStream.serialize(JsonStream.java:490)
	at com.jsoniter.output.JsonStream.serialize(JsonStream.java:470)
	at io.temperley.backtest.ParamsSerDe.serialize(ParamsSerDe.java:45)
	at io.temperley.backtest.ParamsSerDeTest.serialize(ParamsSerDeTest.java:19)
	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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

[willtemperley]

OK I figured out how to do this, I simply needed a class-specific property decoder which simply encodes/decodes the enum as a string. As it's a very simple operation I feel like there should be an easier way to do this, but this works.

JsoniterSpi.registerPropertyEncoder(Params.class, "symbol", (obj, stream) -> stream.writeVal(obj.toString()));

JsoniterSpi.registerPropertyDecoder(Params.class, "symbol", iter -> Symbol.valueOf(iter.readString()));