|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||
java.lang.Objectorg.apache.hadoop.mapreduce.RecordReader<K,V>
org.apache.hadoop.mapreduce.lib.input.DelegatingRecordReader<K,V>
@InterfaceAudience.Private @InterfaceStability.Unstable public class DelegatingRecordReader<K,V>
This is a delegating RecordReader, which delegates the functionality to the
underlying record reader in TaggedInputSplit
| Constructor Summary | |
|---|---|
DelegatingRecordReader(InputSplit split,
TaskAttemptContext context)
Constructs the DelegatingRecordReader. |
|
| Method Summary | |
|---|---|
void |
close()
Close the record reader. |
K |
getCurrentKey()
Get the current key |
V |
getCurrentValue()
Get the current value. |
float |
getProgress()
The current progress of the record reader through its data. |
void |
initialize(InputSplit split,
TaskAttemptContext context)
Called once at initialization. |
boolean |
nextKeyValue()
Read the next key, value pair. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public DelegatingRecordReader(InputSplit split,
TaskAttemptContext context)
throws IOException,
InterruptedException
split - TaggegInputSplit objectcontext - TaskAttemptContext object
IOException
InterruptedException| Method Detail |
|---|
public void close()
throws IOException
RecordReader
close in interface Closeableclose in class RecordReader<K,V>IOException
public K getCurrentKey()
throws IOException,
InterruptedException
RecordReader
getCurrentKey in class RecordReader<K,V>IOException
InterruptedException
public V getCurrentValue()
throws IOException,
InterruptedException
RecordReader
getCurrentValue in class RecordReader<K,V>IOException
InterruptedException
public float getProgress()
throws IOException,
InterruptedException
RecordReader
getProgress in class RecordReader<K,V>IOException
InterruptedException
public void initialize(InputSplit split,
TaskAttemptContext context)
throws IOException,
InterruptedException
RecordReader
initialize in class RecordReader<K,V>split - the split that defines the range of records to readcontext - the information about the task
IOException
InterruptedException
public boolean nextKeyValue()
throws IOException,
InterruptedException
RecordReader
nextKeyValue in class RecordReader<K,V>IOException
InterruptedException
|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||