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

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
static int	DEFAULT_PAGE_SIZE

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

IDENTITY, ZEROES

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

NULL_ACCOUNTABLE

Method Summary

Modifier and Type	Method	Description
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.
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

DEFAULT_PAGE_SIZE

public static final int DEFAULT_PAGE_SIZE

See Also:

Constant Field Values

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.

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.