org.apache.lucene.util.packed

Class PagedGrowableWriter

java.lang.Object

org.apache.lucene.util.LongValues

org.apache.lucene.util.packed.AbstractPagedMutable<PagedGrowableWriter>

org.apache.lucene.util.packed.PagedGrowableWriter

All Implemented Interfaces:

Accountable

public final class PagedGrowableWriter
extends AbstractPagedMutable<PagedGrowableWriter>

A PagedGrowableWriter. This class slices data into fixed-size blocks which have independent numbers of bits per value and grow on-demand.

You should use this class instead of the PackedLongValues related ones only when you need random write-access. Otherwise this class will likely be slower and less memory-efficient.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

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 and Description
PagedGrowableWriter(long size, int pageSize, int startBitsPerValue, float acceptableOverheadRatio) Create a new PagedGrowableWriter instance.

Method Summary

Modifier and Type	Method and Description
protected long	baseRamBytesUsed()
protected PackedInts.Mutable	newMutable(int valueCount, int bitsPerValue)
protected PagedGrowableWriter	newUnfilledCopy(long newSize)

Methods inherited from class org.apache.lucene.util.packed.AbstractPagedMutable

fillPages, get, grow, grow, ramBytesUsed, resize, set, size, 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

Constructor Detail

PagedGrowableWriter

public PagedGrowableWriter(long size,
                           int pageSize,
                           int startBitsPerValue,
                           float acceptableOverheadRatio)

Create a new PagedGrowableWriter instance.

Parameters:

size - the number of values to store.

pageSize - the number of values per page

startBitsPerValue - the initial number of bits per value

acceptableOverheadRatio - an acceptable overhead ratio

Method Detail

newMutable

protected PackedInts.Mutable newMutable(int valueCount,
                                        int bitsPerValue)

Specified by:

newMutable in class AbstractPagedMutable<PagedGrowableWriter>

newUnfilledCopy

protected PagedGrowableWriter newUnfilledCopy(long newSize)

Specified by:

newUnfilledCopy in class AbstractPagedMutable<PagedGrowableWriter>

baseRamBytesUsed

protected long baseRamBytesUsed()

Overrides:

baseRamBytesUsed in class AbstractPagedMutable<PagedGrowableWriter>