org.gcube.indexmanagement.featureindexlibrary.vafile.algo
Class ComputeBoundsLU

java.lang.Object
  org.gcube.indexmanagement.featureindexlibrary.vafile.algo.ComputeBoundsLU

public class ComputeBoundsLU
extends Object

Computes the lower and upper bounds of the query point to all grid cells

Author:

UoA

Constructor Summary

ComputeBoundsLU(float[][] partitionPoints, int buckets)
Creates a new instance

Method Summary

float	getLowerBound(byte[] bitString) Teh lower bound of the bit string
float	getUpperBound(byte[] bitString) The upper bound of the bit string
void	preCompute(float[] vector) precompute the upper lower distance differences for the query vector

Methods inherited from class java.lang.Object

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

Constructor Detail

ComputeBoundsLU

public ComputeBoundsLU(float[][] partitionPoints,
                       int buckets)

Creates a new instance

Parameters:

partitionPoints - Teh partition points

buckets - The buckets

Method Detail

getLowerBound

public float getLowerBound(byte[] bitString)

Teh lower bound of the bit string

Parameters:

bitString - The bit string

Returns:

The lower bound

getUpperBound

public float getUpperBound(byte[] bitString)

The upper bound of the bit string

Parameters:

bitString - The bit string

Returns:

The upper bound

preCompute

public void preCompute(float[] vector)
                throws Exception

precompute the upper lower distance differences for the query vector

Parameters:

vector - The query vector

Throws:

Exception - An error