Serialization of Option<Interface<T>> throws EncodeException

[KWatzal]

Following sample-code throws an Exception:

  @JsonTypeInfo(use = CLASS, include = PROPERTY, property = "@class")
  @JsonAutoDetect(fieldVisibility = ANY, getterVisibility = NONE, setterVisibility = NONE)
  public interface MyInterface<T> {
    boolean myMethod(T value);
  }

  public static class MyClass {
    @JsonProperty("value")
    private final Option<MyInterface<Integer>> value;

    @JsonCreator
    public MyClass(@JsonProperty("value") final Option<MyInterface<Integer>> value) {
      this.value = value;
    }
  }

  public static class ImplementedClass implements MyInterface<Integer> {
    @Override
    public boolean myMethod(final Integer value) {
      return false;
    }
  }

  @Test
  public void optionBindingDoesNotWork() {
    Json.mapper.registerModule(new VavrModule());
    Json.prettyMapper.registerModule(new VavrModule());

    final MyClass opt = new MyClass(Option.some(new ImplementedClass()));
    final String jsonString = Json.encodePrettily(opt);
    final MyClass result = Json.decodeValue(jsonString, new TypeReference<MyClass>() {
    });
  }

Error is: io.vertx.core.json.EncodeException: Failed to encode as JSON: Cannot create TypeBindings for class ImplementedClass with 1 type parameter: class expects 0 (through reference chain: MyClass["value"])

However, making an interface-alias does work:

  public interface MyExtendedInterface extends MyInterface<Integer> {
  }

  public static class OtherImplementedClass implements MyExtendedInterface {

    @Override
    public boolean myMethod(final Integer value) {
      return false;
    }
  }

  public static class MyOtherClass {

    @JsonProperty("value")
    private final Option<MyExtendedInterface> value;

    @JsonCreator
    public MyOtherClass(@JsonProperty("value")final Option<MyExtendedInterface> value) {
      this.value = value;
    }
  }

  @Test
  public void optionBindingDoesWork() {
    Json.mapper.registerModule(new VavrModule());
    Json.prettyMapper.registerModule(new VavrModule());

    final MyOtherClass opt = new MyOtherClass(Option.some(new OtherImplementedClass()));
    final String jsonString = Json.encodePrettily(opt);
    final MyOtherClass result = Json.decodeValue(jsonString, new TypeReference<MyOtherClass>() {
    });
  }

The exception is thrown at: https://github.com/vavr-io/vavr-jackson/blob/2afe67256bc18ee77bfff48f514885734d1b8a64/src/main/java/io/vavr/jackson/datatype/serialize/HListSerializer.java#L54. Most probably because it tries to apply the generic type to MyInterface<Integer>

Exact Stacktrace:

io.vertx.core.json.EncodeException: Failed to encode as JSON: Cannot create TypeBindings for class NonWorkingOptionSerialization$ImplementedClass with 1 type parameter: class expects 0 (through reference chain: NonWorkingOptionSerialization$MyClass["value"])

    at io.vertx.core.json.Json.encodePrettily(Json.java:103)
    at NonWorkingOptionSerialization.optionBindingDoesNotWork(NonWorkingOptionSerialization.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 java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$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)

Doing the same on a List does work.

versions: vavr-jackson: 0.9.2 java: 1.8 vert.x: 3.5.1

[ruslansennov]

vert.x: 3.5.1

:+1:

[goerge]

Is there any plan to release this any time soon?

[ruslansennov]

@goerge version 0.9.2.1 released https://oss.sonatype.org/content/repositories/releases/io/vavr/vavr-jackson/0.9.2.1/