org.apache.lucene.util.bkd

Class MutablePointsReaderUtils

java.lang.Object

org.apache.lucene.util.bkd.MutablePointsReaderUtils

public final class MutablePointsReaderUtils
extends Object

Utility APIs for sorting and partitioning buffered points.

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

Method Summary

Modifier and Type	Method and Description
static void	partition(int numDataDim, int numIndexDim, int maxDoc, int splitDim, int bytesPerDim, int commonPrefixLen, MutablePointValues reader, int from, int to, int mid, BytesRef scratch1, BytesRef scratch2) Partition points around mid.
static void	sort(int maxDoc, int packedBytesLength, MutablePointValues reader, int from, int to) Sort the given MutablePointValues based on its packed value then doc ID.
static void	sortByDim(int numDataDim, int numIndexDim, int sortedDim, int bytesPerDim, int[] commonPrefixLengths, MutablePointValues reader, int from, int to, BytesRef scratch1, BytesRef scratch2) Sort points on the given dimension.

Methods inherited from class java.lang.Object

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

Method Detail

sort

public static void sort(int maxDoc,
                        int packedBytesLength,
                        MutablePointValues reader,
                        int from,
                        int to)

Sort the given MutablePointValues based on its packed value then doc ID.

sortByDim

public static void sortByDim(int numDataDim,
                             int numIndexDim,
                             int sortedDim,
                             int bytesPerDim,
                             int[] commonPrefixLengths,
                             MutablePointValues reader,
                             int from,
                             int to,
                             BytesRef scratch1,
                             BytesRef scratch2)

Sort points on the given dimension.

partition

public static void partition(int numDataDim,
                             int numIndexDim,
                             int maxDoc,
                             int splitDim,
                             int bytesPerDim,
                             int commonPrefixLen,
                             MutablePointValues reader,
                             int from,
                             int to,
                             int mid,
                             BytesRef scratch1,
                             BytesRef scratch2)

Partition points around mid. All values on the left must be less than or equal to it and all values on the right must be greater than or equal to it.