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java.lang.Objectorg.apache.hadoop.mapred.LineRecordReader
public class LineRecordReader
Treats keys as offset in file and value as line.
Nested Class Summary | |
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static class |
LineRecordReader.LineReader
A class that provides a line reader from an input stream. |
Constructor Summary | |
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LineRecordReader(Configuration job,
FileSplit split)
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LineRecordReader(InputStream in,
long offset,
long endOffset)
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LineRecordReader(InputStream in,
long offset,
long endOffset,
Configuration job)
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Method Summary | |
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void |
close()
Close this InputSplit to future operations. |
LongWritable |
createKey()
Create an object of the appropriate type to be used as a key. |
Text |
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()
Get the progress within the split |
boolean |
next(LongWritable key,
Text value)
Read a line. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public LineRecordReader(Configuration job, FileSplit split) throws IOException
IOException
public LineRecordReader(InputStream in, long offset, long endOffset)
public LineRecordReader(InputStream in, long offset, long endOffset, Configuration job) throws IOException
IOException
Method Detail |
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public LongWritable createKey()
RecordReader
createKey
in interface RecordReader<LongWritable,Text>
public Text createValue()
RecordReader
createValue
in interface RecordReader<LongWritable,Text>
public boolean next(LongWritable key, Text value) throws IOException
next
in interface RecordReader<LongWritable,Text>
key
- the key to read data intovalue
- the value to read data into
IOException
public float getProgress()
getProgress
in interface RecordReader<LongWritable,Text>
0.0
to 1.0
.public long getPos() throws IOException
RecordReader
getPos
in interface RecordReader<LongWritable,Text>
IOException
public void close() throws IOException
RecordReader
InputSplit
to future operations.
close
in interface RecordReader<LongWritable,Text>
IOException
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