Alex Baumgarten created AVRO-1801:
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Summary: Generated code results in java.lang.ClassCastException
Key: AVRO-1801
URL: https://issues.apache.org/jira/browse/AVRO-1801
Project: Avro
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Alex Baumgarten
Create and compile avro schema:
{
"namespace": "com.abc.def.ghi.schema",
"type": "record",
"name": "MyDataRecord",
"fields": [
{"name": "Heading", "type": ["null", {"type": "fixed", "name": "short",
"size": 2}]}
]
}
which leads to compiled code:
public void put(int field$, java.lang.Object value$) {
switch (field$) {
case 0: Heading = (com.abc.def.ghi.schema.short$)value$; break;
default: throw new org.apache.avro.AvroRuntimeException("Bad index");
}
}
When this function is called the type of value is
org.apache.avro.generic.GenericData$Fixed and when it tries to cast to the
short$ type it throws a java.lang.ClassCastException.
This occurs when running the following code:
SpecificDatumReader<MyDataRecord> datumReader = new
SpecificDatumReader<>(MyDataRecord.class);
DataFileReader<MyDataRecord> dataFileReader = new DataFileReader<>(new
FsInput(inputAvroPath, configuration), datumReader);
for (MyDataRecord record : dataFileReader) {
// Do something with record
}
If I manually modify the generated code to extract the bytes from value$ and
call the constructor of short$ it works as expected. But this is not what is
generated.
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