@InterfaceAudience.Public @InterfaceStability.Stable public interface ComposableRecordReader<K extends WritableComparable,V extends Writable> extends RecordReader<K,V>, Comparable<ComposableRecordReader<K,?>>
Modifier and Type | Method and Description |
---|---|
void |
accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector jc,
K key)
While key-value pairs from this RecordReader match the given key, register
them with the JoinCollector provided.
|
boolean |
hasNext()
Returns true if the stream is not empty, but provides no guarantee that
a call to next(K,V) will succeed.
|
int |
id()
Return the position in the collector this class occupies.
|
K |
key()
Return the key this RecordReader would supply on a call to next(K,V)
|
void |
key(K key)
Clone the key at the head of this RecordReader into the object provided.
|
void |
skip(K key)
Skip key-value pairs with keys less than or equal to the key provided.
|
close, createKey, createValue, getPos, getProgress, next
compareTo
int id()
void key(K key) throws IOException
IOException
boolean hasNext()
void skip(K key) throws IOException
IOException
void accept(org.apache.hadoop.mapred.join.CompositeRecordReader.JoinCollector jc, K key) throws IOException
IOException
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