org.apache.lucene.util.packed

Class BlockPackedReaderIterator

java.lang.Object

org.apache.lucene.util.packed.BlockPackedReaderIterator

public final class BlockPackedReaderIterator
extends java.lang.Object

Reader for sequences of longs written with BlockPackedWriter.

See Also:

BlockPackedWriter

Field Summary

Fields

Modifier and Type	Field and Description
(package private) byte[]	blocks
(package private) int	blockSize
(package private) DataInput	in
(package private) int	off
(package private) long	ord
(package private) int	packedIntsVersion
(package private) long	valueCount
(package private) long[]	values
(package private) LongsRef	valuesRef

Constructor Summary

Constructors

Constructor and Description
BlockPackedReaderIterator(DataInput in, int packedIntsVersion, int blockSize, long valueCount) Sole constructor.

Method Summary

Modifier and Type	Method and Description
long	next() Read the next value.
LongsRef	next(int count) Read between 1 and count values.
long	ord() Return the offset of the next value to read.
(package private) static long	readVLong(DataInput in)
private void	refill()
void	reset(DataInput in, long valueCount) Reset the current reader to wrap a stream of valueCount values contained in in.
void	skip(long count) Skip exactly count values.
private void	skipBytes(long count)

Methods inherited from class java.lang.Object

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

Field Detail

in

DataInput in

packedIntsVersion

final int packedIntsVersion

valueCount

long valueCount

blockSize

final int blockSize

values

final long[] values

valuesRef

final LongsRef valuesRef

blocks

byte[] blocks

off

int off

ord

long ord

Constructor Detail

BlockPackedReaderIterator

public BlockPackedReaderIterator(DataInput in,
                                 int packedIntsVersion,
                                 int blockSize,
                                 long valueCount)

Sole constructor.

Parameters:

blockSize - the number of values of a block, must be equal to the block size of the BlockPackedWriter which has been used to write the stream

Method Detail

readVLong

static long readVLong(DataInput in)
               throws java.io.IOException

Throws:

java.io.IOException

reset

public void reset(DataInput in,
                  long valueCount)

Reset the current reader to wrap a stream of valueCount values contained in in. The block size remains unchanged.

skip

public void skip(long count)
          throws java.io.IOException

Skip exactly count values.

Throws:

java.io.IOException

skipBytes

private void skipBytes(long count)
                throws java.io.IOException

Throws:

java.io.IOException

next

public long next()
          throws java.io.IOException

Read the next value.

Throws:

java.io.IOException

next

public LongsRef next(int count)
              throws java.io.IOException

Read between 1 and count values.

Throws:

java.io.IOException

refill

private void refill()
             throws java.io.IOException

Throws:

java.io.IOException

ord

public long ord()

Return the offset of the next value to read.