com.fasterxml.sort.std
Class RawTextLineReader

java.lang.Object
  com.fasterxml.sort.DataReader<byte[]>
      com.fasterxml.sort.std.RawTextLineReader

public class RawTextLineReader
extends DataReader<byte[]>

Efficient reader for data that consists of text lines, i.e. character data separated by one of standard line feeds (CR, LF or CR+LF). For efficiency no decoding is done

Nested Class Summary

static class

RawTextLineReader.Factory

Field Summary

protected boolean	_closed
protected boolean	_hadCR Marker we set if the last line ended with a CR, since it may be followed by a trailing LF as part of two-byte linefeed.
protected InputStream	_in
protected byte[]	_inputBuffer
protected int	_inputEnd
protected int	_inputPtr
protected ByteArrayOutputStream	_tmpBytes
protected static byte	BYTE_CR
protected static byte	BYTE_LF

Constructor Summary

RawTextLineReader(InputStream in)

Method Summary

protected boolean	_loadMore()
protected byte[]	_readNextSlow(int start)
protected boolean	_skipCR()
void	close() Method for closing the reader.
int	estimateSizeInBytes(byte[] item) Method that should estimate memory usage of given item, for purpose of limiting amount of data kept in memory during pre-sorting phase.
static RawTextLineReader.Factory	factory() Convenience method for instantiating factory to create instances of this DataReader.
byte[]	readNext() Method for reading the next data item; will return null to indicate end of input, otherwise return a non-null item.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BYTE_CR

protected static final byte BYTE_CR

See Also:

Constant Field Values

BYTE_LF

protected static final byte BYTE_LF

See Also:

Constant Field Values

_in

protected final InputStream _in

_closed

protected boolean _closed

_inputBuffer

protected byte[] _inputBuffer

_inputPtr

protected int _inputPtr

_inputEnd

protected int _inputEnd

_hadCR

protected boolean _hadCR

Marker we set if the last line ended with a CR, since it may be followed by a trailing LF as part of two-byte linefeed.

_tmpBytes

protected ByteArrayOutputStream _tmpBytes

Constructor Detail

RawTextLineReader

public RawTextLineReader(InputStream in)

Method Detail

factory

public static RawTextLineReader.Factory factory()

Convenience method for instantiating factory to create instances of this DataReader.

close

public void close()
           throws IOException

Description copied from class: DataReader

Method for closing the reader. Note that reader needs to ensure that it is ok to call close multiple times. Reader may also close underlying resources as soon as it has reached end of input.

Specified by:

close in class DataReader<byte[]>

Throws:

IOException

estimateSizeInBytes

public int estimateSizeInBytes(byte[] item)

Description copied from class: DataReader

Method that should estimate memory usage of given item, for purpose of limiting amount of data kept in memory during pre-sorting phase.

Specified by:

estimateSizeInBytes in class DataReader<byte[]>

readNext

public byte[] readNext()
                throws IOException

Description copied from class: DataReader

Method for reading the next data item; will return null to indicate end of input, otherwise return a non-null item.

Specified by:

readNext in class DataReader<byte[]>

Throws:

IOException

_readNextSlow

protected final byte[] _readNextSlow(int start)
                              throws IOException

Throws:

IOException

_loadMore

protected boolean _loadMore()
                     throws IOException

Throws:

IOException

_skipCR

protected boolean _skipCR()
                   throws IOException

Throws:

IOException