@Override
public void write(DataOutput out) throws IOException {
// write Partition class name
out.writeUTF(partition.getClass().getName());
// write Partition object content
partition.write(out);
}
@Override
public void readFields(DataInput in) throws IOException {
// read Partition class name
String className = in.readUTF();
// instantiate Partition object
Class<?> clz = ClassUtils.loadClass(className);
if (clz == null) {
throw new SqoopException(MRExecutionError.MAPRED_EXEC_0009, className);
}
try {
partition = (Partition) clz.newInstance();
} catch (Exception e) {
throw new SqoopException(MRExecutionError.MAPRED_EXEC_0010, className, e);
}
// read Partition object content
partition.readFields(in);
}