Package org.apache.lucene.backward_codecs.packed

Class LegacyPacked64

java.lang.Object

org.apache.lucene.util.packed.PackedInts.Reader

org.apache.lucene.backward_codecs.packed.LegacyPacked64

All Implemented Interfaces:

Accountable

class LegacyPacked64
extends PackedInts.Reader

Immutable version of Packed64 which is constructed from am existing DataInput.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	bitsPerValue	bits per value.
(package private) static int	BLOCK_BITS
(package private) static int	BLOCK_SIZE
private long[]	blocks	Values are stores contiguously in the blocks array.
private int	bpvMinusBlockSize	Optimization: Saves one lookup in get(int).
private long	maskRight	A right-aligned mask of width BitsPerValue used by get(int).
(package private) static int	MOD_MASK
protected int	valueCount	number of values

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

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
LegacyPacked64(int packedIntsVersion, DataInput in, int valueCount, int bitsPerValue)	Creates an array with content retrieved from the given DataInput.

Method Summary

Modifier and Type	Method	Description
long	get(int index)	Get the long at the given index.
int	get(int index, long[] arr, int off, int len)	Bulk get: read at least one and at most len longs starting from index into arr[off:off+len] and return the actual number of values that have been read.
long	ramBytesUsed()	Return the memory usage of this object in bytes.
int	size()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

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

getChildResources

Field Detail

BLOCK_SIZE

static final int BLOCK_SIZE

See Also:

Constant Field Values

BLOCK_BITS

static final int BLOCK_BITS

See Also:

Constant Field Values

MOD_MASK

static final int MOD_MASK

See Also:

Constant Field Values

blocks

private final long[] blocks

Values are stores contiguously in the blocks array.

maskRight

private final long maskRight

A right-aligned mask of width BitsPerValue used by get(int).

bpvMinusBlockSize

private final int bpvMinusBlockSize

Optimization: Saves one lookup in get(int).

valueCount

protected final int valueCount

number of values

bitsPerValue

protected final int bitsPerValue

bits per value.

Constructor Detail

LegacyPacked64

public LegacyPacked64(int packedIntsVersion,
                      DataInput in,
                      int valueCount,
                      int bitsPerValue)
               throws java.io.IOException

Creates an array with content retrieved from the given DataInput.

Parameters:

in - a DataInput, positioned at the start of Packed64-content.

valueCount - the number of elements.

bitsPerValue - the number of bits available for any given value.

Throws:

java.io.IOException - if the values for the backing array could not be retrieved.

Method Detail

size

public final int size()

Specified by:

size in class PackedInts.Reader

Returns:

the number of values.

get

public long get(int index)

Description copied from class: PackedInts.Reader

Get the long at the given index. Behavior is undefined for out-of-range indices.

Specified by:

get in class PackedInts.Reader

get

public int get(int index,
               long[] arr,
               int off,
               int len)

Description copied from class: PackedInts.Reader

Bulk get: read at least one and at most len longs starting from index into arr[off:off+len] and return the actual number of values that have been read.

Overrides:

get in class PackedInts.Reader

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

ramBytesUsed

public long ramBytesUsed()

Description copied from interface: Accountable

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