Exidex created FLINK-29534:
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Summary: @TypeInfo on field requires field type to be valid Pojo
Key: FLINK-29534
URL: https://issues.apache.org/jira/browse/FLINK-29534
Project: Flink
Issue Type: Bug
Components: API / Type Serialization System
Affects Versions: 1.15.0, 1.14.0
Reporter: Exidex
The ability to place @TypeInfo on field was added in
[https://github.com/apache/flink/pull/8344] . But it seams like the fact that
it requires field to be a valid POJO was overlooked. In my case I was trying to
add custom serializer for Jackson's ObjectNode (wrapped in List but not sure if
this is relevant https://issues.apache.org/jira/browse/FLINK-26470) which is
not a valid POJO, and this requirement seams to defeat the whole purpose of
such feature.
code snippet from TypeExtractor:
{code:java}
Type fieldType = field.getGenericType();
if (!isValidPojoField(field, clazz, typeHierarchy) && clazz != Row.class) {
LOG.info(
"Class "
+ clazz
+ " cannot be used as a POJO type because not all fields
are valid POJO fields, "
+ "and must be processed as GenericType. {}",
GENERIC_TYPE_DOC_HINT);
return null;
}
try {
final TypeInformation<?> typeInfo;
List<Type> fieldTypeHierarchy = new ArrayList<>(typeHierarchy);
TypeInfoFactory factory = getTypeInfoFactory(field);
if (factory != null) {{code}
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