Package elki.distance.set

Class AbstractSetDistance<O>

java.lang.Object

elki.distance.set.AbstractSetDistance<O>

Type Parameters:

O - Vector type

All Implemented Interfaces:

Distance<O>, PrimitiveDistance<O>

Direct Known Subclasses:

HammingDistance, JaccardSimilarityDistance

public abstract class AbstractSetDistance<O>
extends java.lang.Object
implements PrimitiveDistance<O>

Abstract base class for set distance functions.

Since:

0.7.0

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.Double	DOUBLE_NULL	Constants for checking null.
static java.lang.Integer	INTEGER_NULL	Constants for checking null.
static java.lang.String	STRING_NULL	Empty string.

Constructor Summary

Constructors

Constructor	Description
AbstractSetDistance()

Method Summary

Modifier and Type	Method	Description
protected static boolean	isNull(java.lang.Object val)	Test a value for null.

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.distance.Distance

isMetric, isSquared, isSymmetric

Methods inherited from interface elki.distance.PrimitiveDistance

distance, getInputTypeRestriction, instantiate

Field Detail

INTEGER_NULL

public static final java.lang.Integer INTEGER_NULL

Constants for checking null.

DOUBLE_NULL

public static final java.lang.Double DOUBLE_NULL

Constants for checking null.

STRING_NULL

public static final java.lang.String STRING_NULL

Empty string.

See Also:

Constant Field Values

Constructor Detail

AbstractSetDistance

public AbstractSetDistance()

Method Detail

isNull

protected static boolean isNull(java.lang.Object val)

Test a value for null. TODO: delegate to FeatureVector instead?

Parameters:

val - Value

Returns:

true when null