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Doug Cutting commented on AVRO-680: ----------------------------------- I use 'svn diff' to generate patches, 'svn add' to add new files. I still don't understand how a Collection<Map.Entry> is correctly serialized by ReflectDatumWriter#writeArray() using the schema created by createNonStringMapSchema. I think it works because AbstractMap.SimpleEntry has private fields named "key" and "value", and ReflectData#getField() doesn't check the class name but just sets and gets fields with those names. If so, then a Map.Entry implementation that used different names for those fields would fail to work. > Allow for non-string keys > ------------------------- > > Key: AVRO-680 > URL: https://issues.apache.org/jira/browse/AVRO-680 > Project: Avro > Issue Type: Improvement > Affects Versions: 1.7.6, 1.7.7 > Reporter: Jeremy Hanna > Attachments: AVRO-680.patch, non_string_map_keys.zip, > non_string_map_keys2.zip, non_string_map_keys3.zip > > > Based on an email thread back in April, Doug Cutting proposed a possible > solution for having non-string keys: > Stu Hood wrote: > > I can understand the reasoning behind AVRO-9, but now I need to look for an > > alternative to a 'map' that will allow me to store an association of bytes > > keys to values. > A map of Foo has the same binary format as an array of records, each > with a string field and a Foo field. So an application can use an array > schema similar to this to represent map-like structures with, e.g., > non-string keys. > Perhaps we could establish standard properties that indicate that a > given array of records should be represented in a map-like way if > possible? E.g.,: > {"type": "array", "isMap": true, "items": {"type":"record", ...}} > Doug -- This message was sent by Atlassian JIRA (v6.2#6252)