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java.lang.Object org.apache.hadoop.mapred.SequenceFileRecordReader<K,V>
@InterfaceAudience.Public @InterfaceStability.Stable public class SequenceFileRecordReader<K,V>
An RecordReader
for SequenceFile
s.
Field Summary | |
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protected Configuration |
conf
|
Constructor Summary | |
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SequenceFileRecordReader(Configuration conf,
FileSplit split)
|
Method Summary | |
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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 |
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protected Configuration conf
Constructor Detail |
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public SequenceFileRecordReader(Configuration conf, FileSplit split) throws IOException
IOException
Method Detail |
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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
RecordReader
InputSplit
to future operations.
close
in interface RecordReader<K,V>
IOException
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