Package org.apache.orc.impl

Class RunLengthByteReader

java.lang.Object

org.apache.orc.impl.RunLengthByteReader

public class RunLengthByteReader
extends Object

A reader that reads a sequence of bytes. A control byte is read before each run with positive values 0 to 127 meaning 3 to 130 repetitions. If the byte is -1 to -128, 1 to 128 literal byte values follow.

Constructor Summary

Constructors

Constructor	Description
RunLengthByteReader(InStream input)

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()
byte	next()
void	nextVector(boolean[] isNull, int[] data, long size)	Read the next size bytes into the data array, skipping over any slots where isNull is true.
void	nextVector(org.apache.hadoop.hive.ql.exec.vector.ColumnVector previous, long[] data, long size)
void	seek(PositionProvider index)
void	setInStream(InStream input)
void	skip(long items)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

RunLengthByteReader

public RunLengthByteReader(InStream input)

Method Details

setInStream

public void setInStream(InStream input)

hasNext

public boolean hasNext()
                throws IOException

Throws:

IOException

next

public byte next()
          throws IOException

Throws:

IOException

nextVector

public void nextVector(org.apache.hadoop.hive.ql.exec.vector.ColumnVector previous,
 long[] data,
 long size)
                throws IOException

Throws:

IOException

nextVector

public void nextVector(boolean[] isNull,
 int[] data,
 long size)
                throws IOException

Read the next size bytes into the data array, skipping over any slots where isNull is true.

Parameters:

isNull - if non-null, skip any rows where isNull[r] is true

data - the array to read into

size - the number of elements to read

Throws:

IOException

seek

public void seek(PositionProvider index)
          throws IOException

Throws:

IOException

skip

public void skip(long items)
          throws IOException

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object