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java.lang.Objectorg.apache.hadoop.util.LineReader
public class LineReader
A class that provides a line reader from an input stream. Depending on the constructor used, lines will either be terminated by:
| Constructor Summary | |
|---|---|
LineReader(InputStream in)
Create a line reader that reads from the given stream using the default buffer-size (64k). |
|
LineReader(InputStream in,
byte[] recordDelimiterBytes)
Create a line reader that reads from the given stream using the default buffer-size, and using a custom delimiter of array of bytes. |
|
LineReader(InputStream in,
Configuration conf)
Create a line reader that reads from the given stream using the io.file.buffer.size specified in the given
Configuration. |
|
LineReader(InputStream in,
Configuration conf,
byte[] recordDelimiterBytes)
Create a line reader that reads from the given stream using the io.file.buffer.size specified in the given
Configuration, and using a custom delimiter of array of
bytes. |
|
LineReader(InputStream in,
int bufferSize)
Create a line reader that reads from the given stream using the given buffer-size. |
|
LineReader(InputStream in,
int bufferSize,
byte[] recordDelimiterBytes)
Create a line reader that reads from the given stream using the given buffer-size, and using a custom delimiter of array of bytes. |
|
| Method Summary | |
|---|---|
void |
close()
Close the underlying stream. |
int |
readLine(Text str)
Read from the InputStream into the given Text. |
int |
readLine(Text str,
int maxLineLength)
Read from the InputStream into the given Text. |
int |
readLine(Text str,
int maxLineLength,
int maxBytesToConsume)
Read one line from the InputStream into the given Text. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public LineReader(InputStream in)
in - The input stream
IOException
public LineReader(InputStream in,
int bufferSize)
in - The input streambufferSize - Size of the read buffer
IOException
public LineReader(InputStream in,
Configuration conf)
throws IOException
io.file.buffer.size specified in the given
Configuration.
in - input streamconf - configuration
IOException
public LineReader(InputStream in,
byte[] recordDelimiterBytes)
in - The input streamrecordDelimiterBytes - The delimiter
public LineReader(InputStream in,
int bufferSize,
byte[] recordDelimiterBytes)
in - The input streambufferSize - Size of the read bufferrecordDelimiterBytes - The delimiter
IOException
public LineReader(InputStream in,
Configuration conf,
byte[] recordDelimiterBytes)
throws IOException
io.file.buffer.size specified in the given
Configuration, and using a custom delimiter of array of
bytes.
in - input streamconf - configurationrecordDelimiterBytes - The delimiter
IOException| Method Detail |
|---|
public void close()
throws IOException
IOException
public int readLine(Text str,
int maxLineLength,
int maxBytesToConsume)
throws IOException
str - the object to store the given line (without newline)maxLineLength - the maximum number of bytes to store into str;
the rest of the line is silently discarded.maxBytesToConsume - the maximum number of bytes to consume
in this call. This is only a hint, because if the line cross
this threshold, we allow it to happen. It can overshoot
potentially by as much as one buffer length.
IOException - if the underlying stream throws
public int readLine(Text str,
int maxLineLength)
throws IOException
str - the object to store the given linemaxLineLength - the maximum number of bytes to store into str.
IOException - if the underlying stream throws
public int readLine(Text str)
throws IOException
str - the object to store the given line
IOException - if the underlying stream throws
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