IllegalStateException: Afterburner internal error: BeanDeserializer for [simple type, class Envelope] has no properties that match expected ordering -- can not create optimized deserializer

[steveme]

Hi,

Encountering the following problem with:
jackson-module-afterburner:jar:2.3.2

And the following code:

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.module.afterburner.AfterburnerModule;
import org.junit.Test;

import java.io.IOException;


class Envelope {
    @JsonTypeInfo(use= JsonTypeInfo.Id.CLASS, include= JsonTypeInfo.As.EXTERNAL_PROPERTY, property="class")
    private Object payload;


    public Envelope(@JsonProperty("payload") Object payload) {
        this.payload = payload;
    }

    @JsonProperty
    public Object getPayload() {
        return payload;
    }
}

class Payload {
    private String something;

    public Payload(@JsonProperty("something") String something) {
        this.something = something;
    }
    @JsonProperty
    public Object getSomething() {
        return something;
    }
}


public class AfterBurnerTest {
    @Test
    public void testAfterburner() throws IOException {

        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new AfterburnerModule());
        Envelope envelope = new Envelope(new Payload("test"));
        String json = mapper.writeValueAsString(envelope);
        System.err.println(json);
        Envelope envelope1 = mapper.readValue(json, Envelope.class);
        System.err.println(mapper.writeValueAsString(envelope1));
    }
}

Results in:

{"payload":{"something":"test"},"class":"Payload"}

java.lang.IllegalStateException: Afterburner internal error: BeanDeserializer for [simple type, class Envelope] has no properties that match expected ordering -- can not create optimized deserializer
    at com.fasterxml.jackson.module.afterburner.deser.SuperSonicBeanDeserializer.resolve(SuperSonicBeanDeserializer.java:97)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:292)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:241)
    at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
    at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:381)
    at com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(ObjectMapper.java:3154)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3047)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2146)
    at AfterBurnerTest.testAfterburner(AfterBurnerTest.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
        ...

Only happens with Afterburner, and seems to be due to Envelope only having one property, as adding another property to Envelope seems to fix it.

[cowtowncoder]

Thanks! Will have a look and see why AB gets confused with such classes.

[cowtowncoder]

I can reproduce this problem. Seems to be triggered by polymorphic type handling, possibly by JsonTypeInfo.As.EXTERNAL_PROPERTY. Will try to see how to fix.