Is deserialize(Writable field) able to handle any writable class

[Rodriguez, John]

I have a custom Writable called DigestWritable. The DigestWritable is
stored in a SequenceFile.

 

For illustration, assume it is like this:

public class DigestWritable implements org.apache.hadoop.io.Writable {

  String str;

  int I;

}

 

I started to write a SerDe in order to read the DigestWritable from the
SequenceFile and pass the String/int fields to Hive.

 

However, in

  public Object deserialize(Writable field) throws SerDeException 

 

the Writable param seems to only be allowed to be Text or ByteWritable.

 

Is this correct, or am I doing something wrong in my SerDe?

 

How do I get the Writable to be a DigestWritable?

 

Is the Writable only allowed to be a primitive?

 

Thanks

John