Bruno Gonçalves created CXF-8411:
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Summary: Improve FastInfoset interceptors' compatibility with
GraalVM native compilation
Key: CXF-8411
URL: https://issues.apache.org/jira/browse/CXF-8411
Project: CXF
Issue Type: Improvement
Components: Core
Affects Versions: 3.4.2
Reporter: Bruno Gonçalves
The FastInfoset jar is an optional dependency of CXF which means most
applications will not have it on their classpath. When that is the case, the
GraalVM native compilation of {{FIStaxInInterceptor}} and
{{FIStaxOutInterceptor}} will fail. That in itself is not a big deal as it
would be trivial to apply some substitutions however, the fact that the two
interceptors use classes from FastInfoset in the return values of some of their
methods makes them impossible to substitute.
The two offending methods are:
{{FIStaxInInterceptor}} -> {{private StAXDocumentParser getParser(InputStream
in)}}
{{FIStaxOutInterceptor}} - > {{private StAXDocumentSerializer
getOutput(OutputStream out)}}
I suggest replacing the FastInfoset classes in the return values with the
appropriate StAX interfaces: {{XMLStreamReader}} and {{XMLStreamWriter}}
respectively. There's also a variable in {{FIStaxOutInterceptor}} whose type
could be changed in the same way. These few changes would make the two
interceptors trivial to substitute when FastInfoset is not present at native
compilation time.
If there's interest in this change, I can offer a PR pretty quickly.
An alternative to these changes could be to turn the FastInfoset support into
an extension which could then be disabled during native compilation. However,
the implications of that kind of change are not something I can properly
appreciate with my limited knowledge of the CXF codebase.
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