Trevor Kerby created JOHNZON-335:
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Summary: JsonGeneratorImpl.prepareValue throws
JsonGenerationException when JsonGenerator.write is called from a nested
JsonbSerializer
Key: JOHNZON-335
URL: https://issues.apache.org/jira/browse/JOHNZON-335
Project: Johnzon
Issue Type: Bug
Components: JSON-B
Affects Versions: 1.2.10, 1.2.9
Reporter: Trevor Kerby
Attachments: JohnzonNestedSerializerTest.java
When using two JsonbSerializers registered in JsonbConfig, with one serializer
- the _outer serializer_ - calling SerializationContext.serialize on an object
annotated to be serialized with the other serializer - the _inner serializer_ -
Johnzon fails to write the expected json and throws a JsonGenerationException.
This seems to happen upon any JsonGenerator.write method called inside the
_inner serializer_.
{code:java}
public static class OuterTestSerializer implements
JsonbSerializer<OuterTestModel> {
@Override
public void serialize(OuterTestModel obj, JsonGenerator
generator, SerializationContext ctx) {
generator.writeStartObject();
generator.write("foo", "generated in outer serializer");
ctx.serialize("inner", new InnerTestModel(), generator);
generator.writeEnd();
}
}
public static class InnerTestSerializer implements
JsonbSerializer<InnerTestModel> {
@Override
public void serialize(InnerTestModel obj, JsonGenerator
generator, SerializationContext ctx) {
generator.writeStartObject();
generator.write("bar", "generated in inner serializer");
generator.writeEnd();
}
}
{code}
Below is the formatted version of the json that's expected
{code:json}
{
"foo": "generated in outer serializer",
"inner":
{
"bar": "generated in inner serializer"
}
}
{code}
However Johnzon throws this expection
{code}
javax.json.stream.JsonGenerationException: state IN_OBJECT does not accept a
value
at
org.apache.johnzon.core.JsonGeneratorImpl.prepareValue(JsonGeneratorImpl.java:643)
at
org.apache.johnzon.core.JsonGeneratorImpl.writeStartObject(JsonGeneratorImpl.java:137)
at
org.apache.johnzon.mapper.DynamicMappingGenerator$InObjectOrPrimitiveJsonGenerator.writeStartObject(DynamicMappingGenerator.java:109)
at
org.apache.johnzon.mapper.DynamicMappingGenerator$InObjectOrPrimitiveJsonGenerator.ensureStart(DynamicMappingGenerator.java:99)
at
org.apache.johnzon.mapper.DynamicMappingGenerator$InObjectOrPrimitiveJsonGenerator.writeStartObject(DynamicMappingGenerator.java:106)
at
usa.kerby.tk.jhal.JohnzonNestedSerializerTest$InnerTestSerializer.serialize(JohnzonNestedSerializerTest.java:55)
at
usa.kerby.tk.jhal.JohnzonNestedSerializerTest$InnerTestSerializer.serialize(JohnzonNestedSerializerTest.java:52)
at
org.apache.johnzon.jsonb.JohnzonBuilder.lambda$null$24(JohnzonBuilder.java:313)
at
org.apache.johnzon.mapper.MappingGeneratorImpl.writeObject(MappingGeneratorImpl.java:97)
at
org.apache.johnzon.mapper.DynamicMappingGenerator.writeObject(DynamicMappingGenerator.java:53)
at
org.apache.johnzon.jsonb.serializer.JohnzonSerializationContext.serialize(JohnzonSerializationContext.java:36)
at
usa.kerby.tk.jhal.JohnzonNestedSerializerTest$OuterTestSerializer.serialize(JohnzonNestedSerializerTest.java:46)
at
usa.kerby.tk.jhal.JohnzonNestedSerializerTest$OuterTestSerializer.serialize(JohnzonNestedSerializerTest.java:41)
at
org.apache.johnzon.jsonb.JohnzonBuilder.lambda$null$24(JohnzonBuilder.java:313)
at
org.apache.johnzon.mapper.MappingGeneratorImpl.doWriteObject(MappingGeneratorImpl.java:174)
at org.apache.johnzon.mapper.Mapper.writeObject(Mapper.java:235)
at
org.apache.johnzon.mapper.Mapper.writeObjectWithGenerator(Mapper.java:208)
at org.apache.johnzon.mapper.Mapper.writeObject(Mapper.java:203)
at org.apache.johnzon.mapper.Mapper.writeObjectAsString(Mapper.java:252)
at org.apache.johnzon.jsonb.JohnzonJsonb.toJson(JohnzonJsonb.java:268)
at
usa.kerby.tk.jhal.JohnzonNestedSerializerTest.testNestedSerializer(JohnzonNestedSerializerTest.java:28)
{code}
Tested against Yasson 1.0.8, Johnzon 1.2.9, and Johnzon 1.2.10. Yasson produces
the expected JSON. Am I right in thinking this is a bug?
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