Package org.apache.orc.impl

Class RunLengthIntegerWriter

java.lang.Object

org.apache.orc.impl.RunLengthIntegerWriter

All Implemented Interfaces:

IntegerWriter

public class RunLengthIntegerWriter
extends Object
implements IntegerWriter

A streamFactory that writes a sequence of integers. A control byte is written before each run with positive values 0 to 127 meaning 3 to 130 repetitions, each repetition is offset by a delta. If the control byte is -1 to -128, 1 to 128 literal vint values follow.

Constructor Summary

Constructors

Constructor	Description
RunLengthIntegerWriter(PositionedOutputStream output, boolean signed)

Method Summary

Modifier and Type	Method	Description
void	changeIv(Consumer<byte[]> modifier)
long	estimateMemory()	Estimate the amount of memory being used.
void	flush()	Flush the buffer
void	getPosition(PositionRecorder recorder)	Get position from the stream.
void	write(long value)	Write the integer value

Methods inherited from class java.lang.Object

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

Constructor Details

RunLengthIntegerWriter

public RunLengthIntegerWriter(PositionedOutputStream output,
 boolean signed)

Method Details

flush

public void flush()
           throws IOException

Description copied from interface: IntegerWriter

Flush the buffer

Specified by:

flush in interface IntegerWriter

Throws:

IOException

write

public void write(long value)
           throws IOException

Description copied from interface: IntegerWriter

Write the integer value

Specified by:

write in interface IntegerWriter

Throws:

IOException

getPosition

public void getPosition(PositionRecorder recorder)
                 throws IOException

Description copied from interface: IntegerWriter

Get position from the stream.

Specified by:

getPosition in interface IntegerWriter

Throws:

IOException

estimateMemory

public long estimateMemory()

Description copied from interface: IntegerWriter

Estimate the amount of memory being used.

Specified by:

estimateMemory in interface IntegerWriter

Returns:

number of bytes

changeIv

public void changeIv(Consumer<byte[]> modifier)

Specified by:

changeIv in interface IntegerWriter