net.obsearch.dimension
Class DimensionFloat

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

All Implemented Interfaces:

Comparable<DimensionFloat>

public class DimensionFloat
extends AbstractDimension
implements Comparable<DimensionFloat>

DimensionFloat Stores objects of type float.

Author:

Arnoldo Jose Muller Molina

Constructor Summary

DimensionFloat(int position, float value)
Creates a new DimensionFloat object.

Method Summary

int	compareTo(DimensionFloat other) Compares this object with other.
static float	euclidean(float[] a, float[] b) Calculates the euc distance for two tuples
static float[]	getBasicTuple(OBFloat[] pivots, OBFloat object) Creates a float array from the given pivots and the given object.
static float[]	getPrimitiveTuple(long[] pivots, long objectId, Index<? extends OBFloat> index) Calculates the smap tuple for the given objectId, and the given pivots
static float[]	getPrimitiveTuple(OBFloat[] pivots, OBFloat object) Calculates the smap tuple for the given objectId, and the given pivots
static DimensionFloat[]	getTuple(long[] pivots, long objectId, Index<? extends OBFloat> index) Creates a dimension array from the given pivots and the given object id.
static DimensionFloat[]	getTuple(OBFloat[] pivots, OBFloat object) Creates a dimension array from the given pivots and the given object.
float	getValue()
static float	lInfinite(float[] a, float[] b) Calculates L-inf for two float tuples.
static float	minDistance(List<Long> objects, Index<OBFloat> 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<OBFloat> index, cern.colt.list.LongArrayList excludes, float minDistance) Selects k random elements from the given source.
static DimensionFloat[]	transformPrimitiveTuple(float[] 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

DimensionFloat

public DimensionFloat(int position,
                      float value)

Creates a new DimensionFloat object.

Parameters:

position - The position of this dimension.

value - The value of this dimension.

Method Detail

getTuple

public static DimensionFloat[] getTuple(OBFloat[] pivots,
                                        OBFloat 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<OBFloat> index,
                            cern.colt.list.LongArrayList excludes,
                            float 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 float minDistance(List<Long> objects,
                                Index<OBFloat> 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 float[] getBasicTuple(OBFloat[] pivots,
                                    OBFloat object)
                             throws IllegalIdException,
                                    IllegalAccessException,
                                    InstantiationException,
                                    OBException

Creates a float 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 float array.

Throws:

IllegalIdException

IllegalAccessException

InstantiationException

OBException

getTuple

public static DimensionFloat[] getTuple(long[] pivots,
                                        long objectId,
                                        Index<? extends OBFloat> 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(DimensionFloat other)

Compares this object with other.

Specified by:

compareTo in interface Comparable<DimensionFloat>

getValue

public float getValue()

getPrimitiveTuple

public static float[] getPrimitiveTuple(long[] pivots,
                                        long objectId,
                                        Index<? extends OBFloat> 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 DimensionFloat[] transformPrimitiveTuple(float[] tuple)

Transform the given primitive tuple into a Dimension tuple.

Parameters:

tuple - The tuple that will be transformed.

Returns:

A DimensionFloat of dimensions.

getPrimitiveTuple

public static float[] getPrimitiveTuple(OBFloat[] pivots,
                                        OBFloat 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 float lInfinite(float[] a,
                              float[] b)

Calculates L-inf for two float tuples.

Parameters:

a - tuple

b - tuple

Returns:

L-infinite for a and b.

euclidean

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

Calculates the euc distance for two tuples

Parameters:

a - tuple

b - tuple

Returns:

L-infinite for a and b.