org.apache.hadoop.hive.ql.io
Class HiveRecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

java.lang.Object
  extended by org.apache.hadoop.hive.ql.io.HiveRecordReader<K,V>
All Implemented Interfaces:
org.apache.hadoop.mapred.RecordReader<K,V>

public class HiveRecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>
extends Object
implements org.apache.hadoop.mapred.RecordReader<K,V>

HiveRecordReader is a simple wrapper on RecordReader. It allows us to stop reading the data when some global flag ExecMapper.getDone() is set.


Constructor Summary
HiveRecordReader(org.apache.hadoop.mapred.RecordReader recordReader)
           
 
Method Summary
 void close()
           
 K createKey()
           
 V createValue()
           
 long getPos()
           
 float getProgress()
           
 boolean next(K key, V value)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

HiveRecordReader

public HiveRecordReader(org.apache.hadoop.mapred.RecordReader recordReader)
Method Detail

close

public void close()
           throws IOException
Specified by:
close in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>
Throws:
IOException

createKey

public K createKey()
Specified by:
createKey in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

createValue

public V createValue()
Specified by:
createValue in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

getPos

public long getPos()
            throws IOException
Specified by:
getPos in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>
Throws:
IOException

getProgress

public float getProgress()
                  throws IOException
Specified by:
getProgress in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>
Throws:
IOException

next

public boolean next(K key,
                    V value)
             throws IOException
Specified by:
next in interface org.apache.hadoop.mapred.RecordReader<K extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>
Throws:
IOException


Copyright © 2010 The Apache Software Foundation