Cycle Reference Support
-----------------------
Key: AVRO-695
URL: https://issues.apache.org/jira/browse/AVRO-695
Project: Avro
Issue Type: New Feature
Components: spec
Affects Versions: 1.4.1
Reporter: Moustapha Cherri
Fix For: 1.5.0
This is a proposed implementation to add cycle reference support to Avro. It
basically introduce a new type named Cycle. Cycles contains a string
representing the path to the other reference.
For example if we have an object of type Message that have a member named
previous with type Message too. If we have have this hierarchy:
message
previous : message2
message2
previous : message2
When serializing the cycle path for "message2.previous" will be "previous".
The implementation depend on ANTLR to evaluate those cycle at read time to
resolve them. I used ANTLR 3.2. This dependency is not mandated; I just used
ANTLR to speed thing up. I kept in this implementation the generated code from
ANTLR though this should not be the case as this should be generated during the
build. I only updated the Java code.
I did not make full unit testing but you can find "avrotest.Main" class that
can be used a preliminary test.
Please do not hesitate to contact me for further clarification if this seems
interresting.
Best regards,
Moustapha Cherri
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