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https://issues.apache.org/jira/browse/AVRO-1340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400648#comment-16400648
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ASF GitHub Bot commented on AVRO-1340:
--------------------------------------
bellemare commented on a change in pull request #298: AVRO-1340: Added Enum
Defaults and unit tests.
URL: https://github.com/apache/avro/pull/298#discussion_r174841826
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File path: lang/java/avro/src/main/java/org/apache/avro/Schema.java
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@@ -1450,7 +1473,7 @@ private static Schema applyAliases(Schema s,
Map<Schema,Schema> seen,
case ENUM:
if (aliases.containsKey(name))
result = Schema.createEnum(aliases.get(name).full, s.getDoc(), null,
- s.getEnumSymbols());
+ s.getEnumSymbols(), s.getEnumDefault());
Review comment:
Okay yes, I can add that to this PR.
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> use default to allow old readers to specify default enum value when
> encountering new enum symbols
> -------------------------------------------------------------------------------------------------
>
> Key: AVRO-1340
> URL: https://issues.apache.org/jira/browse/AVRO-1340
> Project: Avro
> Issue Type: Improvement
> Components: spec
> Environment: N/A
> Reporter: Jim Donofrio
> Priority: Minor
>
> The schema resolution page says:
> > if both are enums:
> > if the writer's symbol is not present in the reader's enum, then an
> error is signalled.
> This makes it difficult to use enum's because you can never add a enum value
> and keep old reader's compatible. Why not use the default option to refer to
> one of enum values so that when a old reader encounters a enum ordinal it
> does not recognize, it can default to the optional schema provided one. If
> the old schema does not provide a default then the older reader can continue
> to fail as it does today.
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