Module org.apache.lucene.core

Package org.apache.lucene.util.packed

Class DirectMonotonicReader

java.lang.Object

org.apache.lucene.util.LongValues

org.apache.lucene.util.packed.DirectMonotonicReader

public final class DirectMonotonicReader
extends LongValues

Retrieves an instance previously written by DirectMonotonicWriter.

See Also:

• DirectMonotonicWriter

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DirectMonotonicReader.Meta	In-memory metadata that needs to be kept around for DirectMonotonicReader to read data from disk.

Field Summary

Fields

Modifier and Type	Field	Description
private final float[]	avgs
private final long	blockMask
private final int	blockShift
private final byte[]	bpvs
private final long[]	mins
private final LongValues[]	readers

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

IDENTITY, ZEROES

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DirectMonotonicReader(int blockShift, LongValues[] readers, long[] mins, float[] avgs, byte[] bpvs)

Method Summary

Modifier and Type	Method	Description
long	binarySearch(long fromIndex, long toIndex, long key)	Return the index of a key if it exists, or its insertion point otherwise like Arrays.binarySearch(long[], int, int, long).
long	get(long index)	Get value at index.
private long[]	getBounds(long index)	Get lower/upper bounds for the value at a given index without hitting the direct reader.
static DirectMonotonicReader	getInstance(DirectMonotonicReader.Meta meta, RandomAccessInput data)	Retrieves a non-merging instance from the specified slice.
static DirectMonotonicReader	getInstance(DirectMonotonicReader.Meta meta, RandomAccessInput data, boolean merging)	Retrieves an instance from the specified slice.
static DirectMonotonicReader.Meta	loadMeta(IndexInput metaIn, long numValues, int blockShift)	Load metadata from the given IndexInput.

Methods inherited from class java.lang.Object

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

Field Details

blockShift

private final int blockShift

blockMask

private final long blockMask

readers

private final LongValues[] readers

mins

private final long[] mins

avgs

private final float[] avgs

bpvs

private final byte[] bpvs

Constructor Details

DirectMonotonicReader

private DirectMonotonicReader(int blockShift,
 LongValues[] readers,
 long[] mins,
 float[] avgs,
 byte[] bpvs)

Method Details

loadMeta

public static DirectMonotonicReader.Meta loadMeta(IndexInput metaIn,
 long numValues,
 int blockShift)
                                           throws IOException

Load metadata from the given IndexInput.

Throws:

IOException

See Also:

• getInstance(Meta, RandomAccessInput)

getInstance

public static DirectMonotonicReader getInstance(DirectMonotonicReader.Meta meta,
 RandomAccessInput data)
                                         throws IOException

Retrieves a non-merging instance from the specified slice.

Throws:

IOException

getInstance

public static DirectMonotonicReader getInstance(DirectMonotonicReader.Meta meta,
 RandomAccessInput data,
 boolean merging)
                                         throws IOException

Retrieves an instance from the specified slice.

Throws:

IOException

get

public long get(long index)

Description copied from class: LongValues

Get value at index.

Specified by:

get in class LongValues

getBounds

private long[] getBounds(long index)

Get lower/upper bounds for the value at a given index without hitting the direct reader.

binarySearch

public long binarySearch(long fromIndex,
 long toIndex,
 long key)

Return the index of a key if it exists, or its insertion point otherwise like Arrays.binarySearch(long[], int, int, long).

See Also:

• Arrays.binarySearch(long[], int, int, long)