Package com.illumon.iris.db.v2.utils

Class IndexUtilities

java.lang.Object

com.illumon.iris.db.v2.utils.IndexUtilities

public class IndexUtilities
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	IndexUtilities.Comparator

Constructor Summary

Constructors

Constructor	Description
IndexUtilities()

Method Summary

Modifier and Type	Method	Description
static com.fishlib.base.log.LogOutput	append(com.fishlib.base.log.LogOutput logOutput, ReadOnlyIndex.RangeIterator it)
static void	fillKeyIndicesChunk(ReadOnlyIndex index, WritableLongChunk<? extends Attributes.KeyIndices> chunkToFill)
static void	fillKeyRangesChunk(ReadOnlyIndex index, WritableLongChunk<Attributes.OrderedKeyRanges> chunkToFill)
static void	forAllInvertedLongRanges(Index sourceIndex, Index destIndex, LongRangeConsumer lrc)	This is equivalent to `sourceIndex.invert(destIndex).forAllLongRanges(lrc)`, but requires O(1) space.
static long	rangeSearch(long begin, long end, IndexUtilities.Comparator comp)	Look for the biggest value of i that satisfies begin <= i <= end and comp.directionToTargetFrom(i) > 0, or some value that satisfies comp.directionToTargetFrom(i) == 0.

Methods inherited from class java.lang.Object

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

Constructor Details

IndexUtilities

public IndexUtilities()

Method Details

fillKeyIndicesChunk

public static void fillKeyIndicesChunk(ReadOnlyIndex index, WritableLongChunk<? extends Attributes.KeyIndices> chunkToFill)

fillKeyRangesChunk

public static void fillKeyRangesChunk(ReadOnlyIndex index, WritableLongChunk<Attributes.OrderedKeyRanges> chunkToFill)

append

public static com.fishlib.base.log.LogOutput append(com.fishlib.base.log.LogOutput logOutput, ReadOnlyIndex.RangeIterator it)

rangeSearch

public static long rangeSearch(long begin, long end, IndexUtilities.Comparator comp)

Look for the biggest value of i that satisfies begin <= i <= end and comp.directionToTargetFrom(i) > 0, or some value that satisfies comp.directionToTargetFrom(i) == 0.

Parameters:

begin - The beginning of the range (inclusive)

end - The end of the range (inclusive)

comp - a Comparator.

Returns:

the last position i inside the provided range that satisfies comp.directionToTargetFrom(i) > 0, or some position that satisfies comp.directionToTargetFrom(i) == 0.

forAllInvertedLongRanges

public static void forAllInvertedLongRanges(Index sourceIndex, Index destIndex, LongRangeConsumer lrc)

This is equivalent to `sourceIndex.invert(destIndex).forAllLongRanges(lrc)`, but requires O(1) space. Note that coalescing adjacent position-space runs enables PreemptiveUpdatesTable.copyPartialColumns(com.illumon.iris.db.v2.utils.Index, com.illumon.iris.db.v2.utils.Index, java.lang.Object[], java.lang.Object[]) to make minimal System.arraycopy calls.

Parameters:

sourceIndex - index to find the destIndex keys in - ranges in the callback will be on this index

destIndex - index values to look for within sourceIndex

lrc - consumer to handle each inverted range that is encountered