Package org.apache.lucene.util.packed

Class PackedLongValues

java.lang.Object

org.apache.lucene.util.LongValues

org.apache.lucene.util.packed.PackedLongValues

All Implemented Interfaces:

Accountable

Direct Known Subclasses:

DeltaPackedLongValues

public class PackedLongValues
extends LongValues
implements Accountable

Utility class to compress integers into a LongValues instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PackedLongValues.Builder	A Builder for a PackedLongValues instance.
class	PackedLongValues.Iterator	An iterator over long values.

Field Summary

Fields

Modifier and Type	Field	Description
private static long	BASE_RAM_BYTES_USED
(package private) static int	DEFAULT_PAGE_SIZE
(package private) static int	MAX_PAGE_SIZE
(package private) static int	MIN_PAGE_SIZE
(package private) int	pageMask
(package private) int	pageShift
private long	ramBytesUsed
private long	size
(package private) PackedInts.Reader[]	values

Fields inherited from class org.apache.lucene.util.LongValues

IDENTITY, ZEROES

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
PackedLongValues(int pageShift, int pageMask, PackedInts.Reader[] values, long size, long ramBytesUsed)

Method Summary

Modifier and Type	Method	Description
(package private) int	decodeBlock(int block, long[] dest)
static PackedLongValues.Builder	deltaPackedBuilder(float acceptableOverheadRatio)
static PackedLongValues.Builder	deltaPackedBuilder(int pageSize, float acceptableOverheadRatio)	Return a new PackedLongValues.Builder that will compress efficiently integers that are close to each other.
(package private) long	get(int block, int element)
long	get(long index)	Get value at index.
PackedLongValues.Iterator	iterator()	Return an iterator over the values of this array.
static PackedLongValues.Builder	monotonicBuilder(float acceptableOverheadRatio)
static PackedLongValues.Builder	monotonicBuilder(int pageSize, float acceptableOverheadRatio)	Return a new PackedLongValues.Builder that will compress efficiently integers that would be a monotonic function of their index.
static PackedLongValues.Builder	packedBuilder(float acceptableOverheadRatio)
static PackedLongValues.Builder	packedBuilder(int pageSize, float acceptableOverheadRatio)	Return a new PackedLongValues.Builder that will compress efficiently positive integers.
long	ramBytesUsed()	Return the memory usage of this object in bytes.
long	size()	Get the number of values in this array.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Field Detail

BASE_RAM_BYTES_USED

private static final long BASE_RAM_BYTES_USED

DEFAULT_PAGE_SIZE

static final int DEFAULT_PAGE_SIZE

See Also:

Constant Field Values

MIN_PAGE_SIZE

static final int MIN_PAGE_SIZE

See Also:

Constant Field Values

MAX_PAGE_SIZE

static final int MAX_PAGE_SIZE

See Also:

Constant Field Values

values

final PackedInts.Reader[] values

pageShift

final int pageShift

pageMask

final int pageMask

size

private final long size

ramBytesUsed

private final long ramBytesUsed

Constructor Detail

PackedLongValues

PackedLongValues(int pageShift,
                 int pageMask,
                 PackedInts.Reader[] values,
                 long size,
                 long ramBytesUsed)

Method Detail

packedBuilder

public static PackedLongValues.Builder packedBuilder(int pageSize,
                                                     float acceptableOverheadRatio)

Return a new PackedLongValues.Builder that will compress efficiently positive integers.

packedBuilder

public static PackedLongValues.Builder packedBuilder(float acceptableOverheadRatio)

See Also:

packedBuilder(int, float)

deltaPackedBuilder

public static PackedLongValues.Builder deltaPackedBuilder(int pageSize,
                                                          float acceptableOverheadRatio)

Return a new PackedLongValues.Builder that will compress efficiently integers that are close to each other.

deltaPackedBuilder

public static PackedLongValues.Builder deltaPackedBuilder(float acceptableOverheadRatio)

See Also:

deltaPackedBuilder(int, float)

monotonicBuilder

public static PackedLongValues.Builder monotonicBuilder(int pageSize,
                                                        float acceptableOverheadRatio)

Return a new PackedLongValues.Builder that will compress efficiently integers that would be a monotonic function of their index.

monotonicBuilder

public static PackedLongValues.Builder monotonicBuilder(float acceptableOverheadRatio)

See Also:

monotonicBuilder(int, float)

size

public final long size()

Get the number of values in this array.

decodeBlock

int decodeBlock(int block,
                long[] dest)

get

long get(int block,
         int element)

get

public final long get(long index)

Description copied from class: LongValues

Get value at index.

Specified by:

get in class LongValues

ramBytesUsed

public long ramBytesUsed()

Description copied from interface: Accountable

Return the memory usage of this object in bytes. Negative values are illegal.

Specified by:

ramBytesUsed in interface Accountable

iterator

public PackedLongValues.Iterator iterator()

Return an iterator over the values of this array.