Package org.apache.lucene.util.bkd

Class MutablePointTreeReaderUtils

java.lang.Object

org.apache.lucene.util.bkd.MutablePointTreeReaderUtils

public final class MutablePointTreeReaderUtils
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	Description
static void	partition(BKDConfig config, int maxDoc, int splitDim, int commonPrefixLen, MutablePointTree reader, int from, int to, int mid, BytesRef scratch1, BytesRef scratch2)	Partition points around mid.
static void	sort(BKDConfig config, int maxDoc, MutablePointTree reader, int from, int to)	Sort the given MutablePointTree based on its packed value then doc ID.
static void	sortByDim(BKDConfig config, int sortedDim, int[] commonPrefixLengths, MutablePointTree 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(BKDConfig config,
                        int maxDoc,
                        MutablePointTree reader,
                        int from,
                        int to)

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

sortByDim

public static void sortByDim(BKDConfig config,
                             int sortedDim,
                             int[] commonPrefixLengths,
                             MutablePointTree reader,
                             int from,
                             int to,
                             BytesRef scratch1,
                             BytesRef scratch2)

Sort points on the given dimension.

partition

public static void partition(BKDConfig config,
                             int maxDoc,
                             int splitDim,
                             int commonPrefixLen,
                             MutablePointTree 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.