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From Doug Cutting <cutt...@apache.org>
Subject Re: GenericData union validation - IndexOutOfBoundsException
Date Tue, 16 Dec 2014 18:29:24 GMT
Yes, this looks like a bug in GenericData#validate().  It should use
GenericData#resolveUnion().

Please file an issue in Jira.  If you are able, attach a patch that
includes a test.

Thanks,

Doug

On Tue, Dec 9, 2014 at 12:30 PM, Jeffrey Mullins (BLOOMBERG/ BOSTON)
<jmullins31@bloomberg.net> wrote:
> Hi,
>
> When invoking GenericData.get().validate() with a union schema containing multiple record
schemas an IndexOutOfBoundsException is possible.
>
> The exception results under the following conditions:
>   1) Union contains multiple record schemas
>   2) The first record schema in the union contains more fields than subsequent record
schemas
>   3) validate() is invoked with the union schema and a record of one of the subsequent
record schemas.
>
> Below is a simple unit test which reproduces the exception.
>
>   @Test
>   public void testValidateUnion() {
>       Schema type1Schema = SchemaBuilder.record("Type1")
>           .fields()
>           .requiredString("myString")
>           .requiredInt("myInt")
>           .endRecord();
>
>       Schema type2Schema = SchemaBuilder.record("Type2")
>           .fields()
>           .requiredString("myString")
>           .endRecord();
>
>       Schema unionSchema = SchemaBuilder.unionOf()
>           .type(type1Schema).and().type(type2Schema)
>           .endUnion();
>
>     GenericRecord record = new GenericData.Record(type2Schema);
>     record.put("myString", "myValue");
>     GenericData.get().validate(unionSchema, record);
>   }
>
> I'm happy to submit a JIRA for this issue, but thought I'd check in with the mailing
list before doing so.
>
> Thanks,
> Jeff

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