@InterfaceAudience.Public @InterfaceStability.Stable public class SequenceFileRecordReader<K,V> extends Object implements RecordReader<K,V>
RecordReader
for SequenceFile
s.Modifier and Type | Field and Description |
---|---|
protected Configuration |
conf |
Constructor and Description |
---|
SequenceFileRecordReader(Configuration conf,
FileSplit split) |
Modifier and Type | Method and Description |
---|---|
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) |
protected Configuration conf
public SequenceFileRecordReader(Configuration conf, FileSplit split) throws IOException
IOException
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 intoIOException
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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