Lukas Rohner created CXF-7368:
---------------------------------
Summary: JAXB provider is handling non-jaxb classes
Key: CXF-7368
URL: https://issues.apache.org/jira/browse/CXF-7368
Project: CXF
Issue Type: Bug
Components: JAX-RS
Affects Versions: 3.1.11
Reporter: Lukas Rohner
The default JSONProvider is trying to marshal a non-jaxb class which results in
a 500 response of my endpoint.
One of my endpoints is returning a StreamingOutput object to the response
object:
{noformat}
public static Response okJson(JValue json) {
return Response.ok(new StreamingOutput() {
@Override
public void write(OutputStream s) throws IOException,
WebApplicationException {
try (final BufferedOutputStream bs = new BufferedOutputStream(s)) {
serializer.fn.toJson(json).apply(bs);
}
}
}, MediaType.APPLICATION_JSON_TYPE).build();
}
{noformat}
Unfortunately, the default JSONProvider is trying to marshal this class because
it thinks it is a jaxb supported class. This support check happens in the
AbstractJAXBProvider class:
{noformat}
protected boolean isSupported(Class<?> type, Type genericType, Annotation[]
anns) {
if (jaxbElementClassMap != null &&
jaxbElementClassMap.containsKey(type.getName())
|| isSkipJaxbChecks()) {
return true;
}
return isXmlRoot(type)
|| JAXBElement.class.isAssignableFrom(type)
|| objectFactoryOrIndexAvailable(type)
|| (type != genericType && objectFactoryForType(genericType))
|| org.apache.cxf.jaxrs.utils.JAXBUtils.getAdapter(type, anns) !=
null;
}
protected boolean objectFactoryOrIndexAvailable(Class<?> type) {
return type.getResource("ObjectFactory.class") != null
|| type.getResource("jaxb.index") != null;
}
{noformat}
The issue is that the objectFactoryOrIndexAvailable is returning true which
doesn't indicate that the type itself is a jaxb class. To fix the support
mehtod it should actually check if there is and jaxb.index file and if in the
index file the current type is available. Then we can clearly say it's a jaxb
supported class.
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