intArray2HBase

I tried this:
        Integer[][] depthMap = DepthMapGenerator.getRandomDepthMap()
        Writable w = new HbaseObjectWritable(depthMap);
        byte[] depthMapByteArray = WritableUtils.toByteArray(w);
        p.add(Bytes.toBytes(FAMILY_NAME), Bytes.toBytes("depthMap"),  depthMapByteArray);


..and got:

java.lang.UnsupportedOperationException: No code for unexpected class [[Ljava.lang.Integer;
    at org.apache.hadoop.hbase.io.HbaseObjectWritable.writeClassCode(HbaseObjectWritable.java:319)
    at org.apache.hadoop.hbase.io.HbaseObjectWritable.writeObject(HbaseObjectWritable.java:367)
    at org.apache.hadoop.hbase.io.HbaseObjectWritable.write(HbaseObjectWritable.java:263)
    at org.apache.hadoop.io.WritableUtils.toByteArray(WritableUtils.java:410)
    at de.syrtec.hbaseTest.HBaseCRUD.setTest(HBaseCRUD.java:95)
    at de.syrtec.hbaseTest.HBaseTestStarter.main(HBaseTestStarter.java:30)