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https://issues.apache.org/jira/browse/AVRO-695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ryan Blue updated AVRO-695:
---------------------------
Resolution: Fixed
Assignee: Ryan Blue
Fix Version/s: 1.8.0
Status: Resolved (was: Patch Available)
Closing this since it is available using logical types and is used as a [test
case|https://github.com/apache/avro/blob/trunk/lang/java/avro/src/test/java/org/apache/avro/TestCircularReferences.java].
> 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: 1.7.6
> Reporter: Moustapha Cherri
> Assignee: Ryan Blue
> Fix For: 1.8.0
>
> Attachments: AVRO-695.patch, AVRO-695.patch, PERF_8000_cycles.zip,
> avro-1.4.1-cycle.patch.gz, avro-1.4.1-cycle.patch.gz,
> avro_circular_references.zip, avro_circular_refs6.patch,
> avro_circular_refs7.patch, avro_circular_refs_2014_06_14.zip,
> circular_refs_and_nonstring_map_keys_2014_06_25.zip
>
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> 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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