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https://issues.apache.org/jira/browse/AVRO-1020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Doug Cutting updated AVRO-1020:
-------------------------------
Attachment: AVRO-1020.patch
The problem is that RecordBuilderBase is hardwired to use GenericDatumReader.
Here's a patch that fixes this by adding a createDatumReader() method to
GenericData and its subclasses that returns the appropriate datum reader.
> Builder API fails to substitute default values for enum types
> -------------------------------------------------------------
>
> Key: AVRO-1020
> URL: https://issues.apache.org/jira/browse/AVRO-1020
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.6.1
> Reporter: James Baldassari
> Fix For: 1.6.2
>
> Attachments: AVRO-1020.bug.patch, AVRO-1020.patch
>
>
> If a schema has an enum type with a default value, and the Builder API is
> used to automatically substitute the default value on build(), a
> ClassCastException is thrown. The reason is that the default value resolves
> to a GenericData.EnumSymbol. The specific builder then attempts to cast this
> value to the corresponding Java enum type, which fails. Here is an example
> stack trace:
> {noformat}
> org.apache.avro.AvroRuntimeException: java.lang.ClassCastException:
> org.apache.avro.generic.GenericData$EnumSymbol cannot be cast to
> org.apache.avro.ipc.specific.PrivacyType
> at org.apache.avro.ipc.specific.Person$Builder.build(Person.java:410)
> at
> org.apache.avro.specific.TestSpecificRecordBuilder.testSpecificBuilder(TestSpecificRecordBuilder.java:51)
> Caused by: java.lang.ClassCastException:
> org.apache.avro.generic.GenericData$EnumSymbol cannot be cast to
> org.apache.avro.ipc.specific.PrivacyType
> at org.apache.avro.ipc.specific.Person$Builder.build(Person.java:407)
> ... 24 more
> {noformat}
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