@InterfaceAudience.Public @InterfaceStability.Stable public abstract class CombineFileRecordReaderWrapper<K,V> extends RecordReader<K,V>
CombineFileRecordReader
.
Subclassing is needed to get a concrete record reader wrapper because of the
constructor requirement.修飾子 | コンストラクタと説明 |
---|---|
protected |
CombineFileRecordReaderWrapper(FileInputFormat<K,V> inputFormat,
CombineFileSplit split,
TaskAttemptContext context,
Integer idx) |
修飾子とタイプ | メソッドと説明 |
---|---|
void |
close()
Close the record reader.
|
K |
getCurrentKey()
Get the current key
|
V |
getCurrentValue()
Get the current value.
|
float |
getProgress()
The current progress of the record reader through its data.
|
void |
initialize(InputSplit split,
TaskAttemptContext context)
Called once at initialization.
|
boolean |
nextKeyValue()
Read the next key, value pair.
|
protected CombineFileRecordReaderWrapper(FileInputFormat<K,V> inputFormat, CombineFileSplit split, TaskAttemptContext context, Integer idx) throws IOException, InterruptedException
public void initialize(InputSplit split, TaskAttemptContext context) throws IOException, InterruptedException
RecordReader
initialize
クラス内 RecordReader<K,V>
split
- the split that defines the range of records to readcontext
- the information about the taskIOException
InterruptedException
public boolean nextKeyValue() throws IOException, InterruptedException
RecordReader
nextKeyValue
クラス内 RecordReader<K,V>
IOException
InterruptedException
public K getCurrentKey() throws IOException, InterruptedException
RecordReader
getCurrentKey
クラス内 RecordReader<K,V>
IOException
InterruptedException
public V getCurrentValue() throws IOException, InterruptedException
RecordReader
getCurrentValue
クラス内 RecordReader<K,V>
IOException
InterruptedException
public float getProgress() throws IOException, InterruptedException
RecordReader
getProgress
クラス内 RecordReader<K,V>
IOException
InterruptedException
public void close() throws IOException
RecordReader
close
インタフェース内 Closeable
close
インタフェース内 AutoCloseable
close
クラス内 RecordReader<K,V>
IOException
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