net.obsearch.dimension
Class DimensionDouble

java.lang.Object
  net.obsearch.dimension.AbstractDimension
      net.obsearch.dimension.DimensionDouble

All Implemented Interfaces:

Comparable<DimensionDouble>

public class DimensionDouble
extends AbstractDimension
implements Comparable<DimensionDouble>

DimensionDouble Stores objects of type double.

Author:

Arnoldo Jose Muller Molina

Constructor Summary

DimensionDouble(int position, double value)
Creates a new DimensionDouble object.

Method Summary

int	compareTo(DimensionDouble other) Compares this object with other.
static double	euclidean(double[] a, double[] b) Calculates the euc distance for two tuples
static double[]	getBasicTuple(OBDouble[] pivots, OBDouble object) Creates a double array from the given pivots and the given object.
static double[]	getPrimitiveTuple(long[] pivots, long objectId, Index<? extends OBDouble> index) Calculates the smap tuple for the given objectId, and the given pivots
static double[]	getPrimitiveTuple(OBDouble[] pivots, OBDouble object) Calculates the smap tuple for the given objectId, and the given pivots
static DimensionDouble[]	getTuple(long[] pivots, long objectId, Index<? extends OBDouble> index) Creates a dimension array from the given pivots and the given object id.
static DimensionDouble[]	getTuple(OBDouble[] pivots, OBDouble object) Creates a dimension array from the given pivots and the given object.
double	getValue()
static double	lInfinite(double[] a, double[] b) Calculates L-inf for two double tuples.
static double	minDistance(List<Long> objects, Index<OBDouble> index) Calculate the minimum distance of the given objects (all objects compared against all objects)
static long[]	select(int k, Random r, cern.colt.list.LongArrayList source, Index<OBDouble> index, cern.colt.list.LongArrayList excludes, double minDistance) Selects k random elements from the given source.
static DimensionDouble[]	transformPrimitiveTuple(double[] tuple) Transform the given primitive tuple into a Dimension tuple.

Methods inherited from class net.obsearch.dimension.AbstractDimension

getOrder, mapId, max, select

Methods inherited from class java.lang.Object

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

Constructor Detail

DimensionDouble

public DimensionDouble(int position,
                       double value)

Creates a new DimensionDouble object.

Parameters:

position - The position of this dimension.

value - The value of this dimension.

Method Detail

getTuple

public static DimensionDouble[] getTuple(OBDouble[] pivots,
                                         OBDouble object)
                                  throws IllegalIdException,
                                         IllegalAccessException,
                                         InstantiationException,
                                         OBException

Creates a dimension array from the given pivots and the given object.

Parameters:

pivots - The pivots used for the embedding.

object - The object to be projected.

Returns:

A new dimension array.

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

select

public static long[] select(int k,
                            Random r,
                            cern.colt.list.LongArrayList source,
                            Index<OBDouble> index,
                            cern.colt.list.LongArrayList excludes,
                            double minDistance)
                     throws IllegalIdException,
                            OBException,
                            IllegalAccessException,
                            InstantiationException

Selects k random elements from the given source.

Parameters:

k - number of elements to select

r - Random object used to randomly select objects.

source - The source of item ids.

index - underlying index.

will - not add pivots included in excludes.

minDistance - The min distance required by the objects.

Returns:

The ids of selected objects.

Throws:

IllegalIdException

OBException

IllegalAccessException

InstantiationException

minDistance

public static double minDistance(List<Long> objects,
                                 Index<OBDouble> index)
                          throws IllegalIdException,
                                 OBException,
                                 IllegalAccessException,
                                 InstantiationException

Calculate the minimum distance of the given objects (all objects compared against all objects)

Parameters:

objects -

Returns:

the min distance

Throws:

IllegalIdException

OBException

IllegalAccessException

InstantiationException

getBasicTuple

public static double[] getBasicTuple(OBDouble[] pivots,
                                     OBDouble object)
                              throws IllegalIdException,
                                     IllegalAccessException,
                                     InstantiationException,
                                     OBException

Creates a double array from the given pivots and the given object.

Parameters:

pivots - The pivots used for the embedding.

object - The object to be projected.

Returns:

A new double array.

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

getTuple

public static DimensionDouble[] getTuple(long[] pivots,
                                         long objectId,
                                         Index<? extends OBDouble> index)
                                  throws IllegalIdException,
                                         IllegalAccessException,
                                         InstantiationException,
                                         OBException

Creates a dimension array from the given pivots and the given object id. Loads the objects from the DB.

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

compareTo

public int compareTo(DimensionDouble other)

Compares this object with other.

Specified by:

compareTo in interface Comparable<DimensionDouble>

getValue

public double getValue()

getPrimitiveTuple

public static double[] getPrimitiveTuple(long[] pivots,
                                         long objectId,
                                         Index<? extends OBDouble> index)
                                  throws IllegalIdException,
                                         IllegalAccessException,
                                         InstantiationException,
                                         OBException

Calculates the smap tuple for the given objectId, and the given pivots

Parameters:

pivots -

objectId -

Returns:

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

transformPrimitiveTuple

public static DimensionDouble[] transformPrimitiveTuple(double[] tuple)

Transform the given primitive tuple into a Dimension tuple.

Parameters:

tuple - The tuple that will be transformed.

Returns:

A DimensionDouble of dimensions.

getPrimitiveTuple

public static double[] getPrimitiveTuple(OBDouble[] pivots,
                                         OBDouble object)
                                  throws IllegalIdException,
                                         IllegalAccessException,
                                         InstantiationException,
                                         OBException

Calculates the smap tuple for the given objectId, and the given pivots

Parameters:

pivots -

objectId -

Returns:

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

lInfinite

public static double lInfinite(double[] a,
                               double[] b)

Calculates L-inf for two double tuples.

Parameters:

a - tuple

b - tuple

Returns:

L-infinite for a and b.

euclidean

public static double euclidean(double[] a,
                               double[] b)

Calculates the euc distance for two tuples

Parameters:

a - tuple

b - tuple

Returns:

L-infinite for a and b.