[AVRO-667] GenericArray fails to compare with List. SpecificRecord compare gets ClassCastException

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.4.1
• Component/s: java
• Assignee: Scott Carey
• Reporter: Scott Carey
• Created: 16/Sep/10 04:49
• Updated: 14/Oct/10 19:06
• Resolved: 17/Sep/10 01:42

Description

AVRO-637 is incomplete.

I am unable to convert my SpecificRecord project to 1.4. It compiles, but unit tests get runtime exceptions.

compareTo in GenericData does not handle List vs GenericArray and I get class cast exceptions.

java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.apache.avro.generic.GenericArray
	at org.apache.avro.generic.GenericData.compare(GenericData.java:502)
	at org.apache.avro.specific.SpecificData.compare(SpecificData.java:190)
	at org.apache.avro.generic.GenericData.compare(GenericData.java:494)
	at org.apache.avro.specific.SpecificData.compare(SpecificData.java:190)
	at org.apache.avro.specific.SpecificRecordBase.compareTo(SpecificRecordBase.java:45)
	at org.apache.avro.specific.SpecificRecordBase.equals(SpecificRecordBase.java:35)
	at com.rr.eventdata.ViewRecord.equals(ViewRecord.java:350)
	at com.rr.eventdata.WriteStuffTest.main(WriteStuffTest.java:143)
	at com.rr.eventdata.WriteStuffTest.testReadWriteDataFile(WriteStuffTest.java:55)

Also, an array of string in SpecificRecord ends up as List<CharSequence>.
However, it should be List<? extends CharSequence> or else you can't assign a List<String> to it.