org.apache.hadoop.mapreduce.lib.join
Class OuterJoinRecordReader<K extends org.apache.hadoop.io.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,org.apache.hadoop.io.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,?>>, org.apache.hadoop.conf.Configurable

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

Full outer join.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.join.JoinRecordReader

JoinRecordReader.JoinDelegationIterator

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.join.CompositeRecordReader

CompositeRecordReader.JoinCollector

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 org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable,TupleWritable>