@InterfaceAudience.Public @InterfaceStability.Stable public abstract class CombineFileRecordReaderWrapper<K,V> extends Object implements RecordReader<K,V>
CombineFileRecordReader.
Subclassing is needed to get a concrete record reader wrapper because of the
constructor requirement.| Modifier | Constructor and Description |
|---|---|
protected |
CombineFileRecordReaderWrapper(FileInputFormat<K,V> inputFormat,
CombineFileSplit split,
Configuration conf,
Reporter reporter,
Integer idx) |
| 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.
|
long |
getPos()
Returns the current position in the input.
|
float |
getProgress()
How much of the input has the
RecordReader consumed i.e. |
boolean |
next(K key,
V value)
Reads the next key/value pair from the input for processing.
|
protected CombineFileRecordReaderWrapper(FileInputFormat<K,V> inputFormat, CombineFileSplit split, Configuration conf, Reporter reporter, Integer idx) throws IOException
IOExceptionpublic boolean next(K key, V value) throws IOException
RecordReadernext in interface RecordReader<K,V>key - the key to read data intovalue - the value to read data intoIOExceptionpublic K createKey()
RecordReadercreateKey in interface RecordReader<K,V>public V createValue()
RecordReadercreateValue in interface RecordReader<K,V>public long getPos()
throws IOException
RecordReadergetPos in interface RecordReader<K,V>IOExceptionpublic void close()
throws IOException
RecordReaderInputSplit to future operations.close in interface RecordReader<K,V>IOExceptionpublic float getProgress()
throws IOException
RecordReaderRecordReader consumed i.e.
has been processed by?getProgress in interface RecordReader<K,V>0.0 to 1.0.IOExceptionCopyright © 2022 Apache Software Foundation. All rights reserved.