cascading.tap.hadoop.io

Class CombineFileRecordReaderWrapper<K,V>

java.lang.Object

cascading.tap.hadoop.io.CombineFileRecordReaderWrapper<K,V>

public class CombineFileRecordReaderWrapper<K,V>
extends java.lang.Object

A wrapper class for a record reader that handles a single file split. It delegates most of the methods to the wrapped instance. We need this wrapper to satisfy the constructor requirement to be used with hadoop's CombineFileRecordReader class.

See Also:

org.apache.hadoop.mapred.lib.CombineFileRecordReader, org.apache.hadoop.mapred.lib.CombineFileInputFormat

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	INDIVIDUAL_INPUT_FORMAT property that indicates how individual input format is to be interpreted

Constructor Summary

Constructors

Constructor and Description
CombineFileRecordReaderWrapper(CombineFileSplit split, Configuration conf, Reporter reporter, java.lang.Integer idx)

Method Summary

Modifier and Type	Method and Description
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

Field Detail

INDIVIDUAL_INPUT_FORMAT

public static final java.lang.String INDIVIDUAL_INPUT_FORMAT

property that indicates how individual input format is to be interpreted

See Also:

Constant Field Values

Constructor Detail

CombineFileRecordReaderWrapper

public CombineFileRecordReaderWrapper(CombineFileSplit split,
                                      Configuration conf,
                                      Reporter reporter,
                                      java.lang.Integer idx)
                               throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

next

public boolean next(K key,
                    V value)
             throws java.io.IOException

Throws:

java.io.IOException

createKey

public K createKey()

createValue

public V createValue()

getPos

public long getPos()
            throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

getProgress

public float getProgress()
                  throws java.io.IOException

Throws:

java.io.IOException