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java.lang.Objectorg.apache.hadoop.mapred.SequenceFileRecordReader<K,V>
public class SequenceFileRecordReader<K,V>
An RecordReader for SequenceFiles.
| Field Summary | |
|---|---|
protected Configuration |
conf
|
| Constructor Summary | |
|---|---|
SequenceFileRecordReader(Configuration conf,
FileSplit split)
|
|
| Method Summary | |
|---|---|
void |
close()
Close this InputSplit to future operations. |
K |
createKey()
Create an object of the appropriate type to be used as a key. |
V |
createValue()
Create an object of the appropriate type to be used as a value. |
protected void |
getCurrentValue(V value)
|
Class |
getKeyClass()
The class of key that must be passed to next(Object, Object).. |
long |
getPos()
Returns the current position in the input. |
float |
getProgress()
Return the progress within the input split |
Class |
getValueClass()
The class of value that must be passed to next(Object, Object).. |
protected boolean |
next(K key)
|
boolean |
next(K key,
V value)
Reads the next key/value pair from the input for processing. |
protected void |
seek(long pos)
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected Configuration conf
| Constructor Detail |
|---|
public SequenceFileRecordReader(Configuration conf,
FileSplit split)
throws IOException
IOException| Method Detail |
|---|
public Class getKeyClass()
next(Object, Object)..
public Class getValueClass()
next(Object, Object)..
public K createKey()
RecordReader
createKey in interface RecordReader<K,V>public V createValue()
RecordReader
createValue in interface RecordReader<K,V>
public boolean next(K key,
V value)
throws IOException
RecordReader
next in interface RecordReader<K,V>key - the key to read data intovalue - the value to read data into
IOException
protected boolean next(K key)
throws IOException
IOException
protected void getCurrentValue(V value)
throws IOException
IOException
public float getProgress()
throws IOException
getProgress in interface RecordReader<K,V>IOException
public long getPos()
throws IOException
RecordReader
getPos in interface RecordReader<K,V>IOException
protected void seek(long pos)
throws IOException
IOException
public void close()
throws IOException
RecordReaderInputSplit to future operations.
close in interface RecordReader<K,V>IOException
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