add java annotation to specify arbitrary schema
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Key: AVRO-432
URL: https://issues.apache.org/jira/browse/AVRO-432
Project: Avro
Issue Type: New Feature
Components: java
Affects Versions: 1.3.0
Reporter: Doug Cutting
Fix For: 1.3.1
HDFS now includes a class (HdfsFileStatus) with a field (symlink) whose type is
byte[] but which is null for non-symlinks. For most other types, we could
annotate this with something like @Union({Void.class, Foo.class}) to declare
that the field may be null. But there is unfortunately no way to refer to the
class of byte[] in an annotation. So, instead, I propose to add an annotation
that permits the specification of an arbitrary schema. In this case, the
annotation would then be @AvroSchema("[\"null\",\bytes\"").
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