org.apache.hadoop.mapreduce.lib.join
Class OuterJoinRecordReader<K extends WritableComparable<?>>

java.lang.Object
  org.apache.hadoop.mapreduce.RecordReader<K,V>
      org.apache.hadoop.mapreduce.lib.join.ComposableRecordReader<K,X>
          org.apache.hadoop.mapreduce.lib.join.CompositeRecordReader<K,Writable,TupleWritable>
              org.apache.hadoop.mapreduce.lib.join.JoinRecordReader<K>
                  org.apache.hadoop.mapreduce.lib.join.OuterJoinRecordReader<K>

All Implemented Interfaces:

Closeable, Comparable<ComposableRecordReader<K,?>>, Configurable

@InterfaceAudience.Public
@InterfaceStability.Stable
public class OuterJoinRecordReader<K extends WritableComparable<?>>
extends JoinRecordReader<K>

Full outer join.

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.join.CompositeRecordReader

conf, jc, key, keyclass, kids, value

Method Summary

protected boolean

combine(Object[] srcs, TupleWritable dst) Emit everything from the collector.

Methods inherited from class org.apache.hadoop.mapreduce.lib.join.JoinRecordReader

createValue, getDelegate, nextKeyValue

Methods inherited from class org.apache.hadoop.mapreduce.lib.join.CompositeRecordReader

accept, add, close, compareTo, createKey, createTupleWritable, fillJoinCollector, getComparator, getConf, getCurrentKey, getCurrentValue, getProgress, getRecordReaderQueue, hasNext, id, initialize, key, key, setConf, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

combine

protected boolean combine(Object[] srcs,
                          TupleWritable dst)

Emit everything from the collector.

Specified by:

combine in class CompositeRecordReader<K extends WritableComparable<?>,Writable,TupleWritable>