de.lmu.ifi.dbs.elki.distance.distancevalue

Class BitDistance

java.lang.Object

de.lmu.ifi.dbs.elki.distance.distancevalue.AbstractDistance<D>

de.lmu.ifi.dbs.elki.distance.distancevalue.NumberDistance<BitDistance,Bit>

de.lmu.ifi.dbs.elki.distance.distancevalue.BitDistance

All Implemented Interfaces:

Distance<BitDistance>, Externalizable, Serializable, Comparable<BitDistance>

public class BitDistance
extends NumberDistance<BitDistance,Bit>

Provides a Distance for a bit-valued distance.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static BitDistance	FACTORY The static factory instance
static BitDistance	ONE Distance 1.
private static long	serialVersionUID Generated serial version UID
private boolean	value The distance value
static BitDistance	ZERO Distance 0.

Fields inherited from class de.lmu.ifi.dbs.elki.distance.distancevalue.AbstractDistance

DOUBLE_PATTERN, INFINITY_PATTERN, INTEGER_PATTERN

Constructor Summary

Constructors

Constructor and Description
BitDistance() Empty constructor for serialization purposes.
BitDistance(Bit bit) Constructs a new BitDistance object that represents the bit argument.
BitDistance(boolean bit) Constructs a new BitDistance object that represents the bit argument.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	bitValue() Returns the value of this BitDistance as a boolean.
int	compareTo(BitDistance other)
double	doubleValue() Get the value as double.
boolean	equals(Object obj) Returns true if this == o has the value true or o is not null and o is of the same class as this instance and this.compareTo(o) is 0, false otherwise.
int	externalizableSize() Returns the number of Bytes this distance uses if it is written to an external file.
BitDistance	fromDouble(double val) Build a new instance from a double value.
Pattern	getPattern() Get the pattern accepted by this distance
int	hashCode() Any extending class should implement a proper hashCode method.
BitDistance	infiniteDistance() Provides an infinite distance.
int	intValue() Get the value as int.
boolean	isInfiniteDistance() Returns true, if the distance is an infinite distance, false otherwise.
boolean	isNullDistance() Returns true, if the distance is a null distance, false otherwise.
boolean	isUndefinedDistance() Returns true, if the distance is an undefined distance, false otherwise.
long	longValue() Get the value as long.
BitDistance	nullDistance() Provides a null distance.
BitDistance	parseString(String val) Provides a measurement suitable to this measurement function based on the given pattern.
void	readExternal(ObjectInput in) Reads the bit value of this BitDistance from the specified stream.
String	toString() Any implementing class should implement a proper toString-method for printing the result-values.
BitDistance	undefinedDistance() Provides an undefined distance.
void	writeExternal(ObjectOutput out) Writes the bit value of this BitDistance to the specified stream.

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancevalue.NumberDistance

byteValue, floatValue, shortValue

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancevalue.AbstractDistance

requiredInputPattern, testInputPattern

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

FACTORY

public static final BitDistance FACTORY

The static factory instance

value

private boolean value

The distance value

ZERO

public static final BitDistance ZERO

Distance 0.

ONE

public static final BitDistance ONE

Distance 1.

serialVersionUID

private static final long serialVersionUID

Generated serial version UID

See Also:

Constant Field Values

Constructor Detail

BitDistance

public BitDistance()

Empty constructor for serialization purposes.

BitDistance

public BitDistance(boolean bit)

Constructs a new BitDistance object that represents the bit argument.

Parameters:

bit - the value to be represented by the BitDistance.

BitDistance

public BitDistance(Bit bit)

Constructs a new BitDistance object that represents the bit argument.

Parameters:

bit - the value to be represented by the BitDistance.

Method Detail

fromDouble

public BitDistance fromDouble(double val)

Description copied from class: NumberDistance

Build a new instance from a double value.

Specified by:

fromDouble in class NumberDistance<BitDistance,Bit>

Parameters:

val - Value

Returns:

Distance

bitValue

public boolean bitValue()

Returns the value of this BitDistance as a boolean.

Returns:

the value as a boolean

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Writes the bit value of this BitDistance to the specified stream.

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException

Reads the bit value of this BitDistance from the specified stream.

Throws:

IOException

externalizableSize

public int externalizableSize()

Returns the number of Bytes this distance uses if it is written to an external file.

Returns:

1 (1 Byte for a boolean value)

doubleValue

public double doubleValue()

Description copied from class: NumberDistance

Get the value as double.

Specified by:

doubleValue in class NumberDistance<BitDistance,Bit>

Returns:

same result as getValue().doubleValue() but may be more efficient.

longValue

public long longValue()

Description copied from class: NumberDistance

Get the value as long.

Specified by:

longValue in class NumberDistance<BitDistance,Bit>

Returns:

same result as getValue().longValue() but may be more efficient.

intValue

public int intValue()

Description copied from class: NumberDistance

Get the value as int.

Overrides:

intValue in class NumberDistance<BitDistance,Bit>

Returns:

same result as getValue().intValue() but may be more efficient.

compareTo

public int compareTo(BitDistance other)

parseString

public BitDistance parseString(String val)
                        throws IllegalArgumentException

Description copied from interface: Distance

Provides a measurement suitable to this measurement function based on the given pattern.

Parameters:

val - a pattern defining a similarity suitable to this measurement function

Returns:

a measurement suitable to this measurement function based on the given pattern

Throws:

IllegalArgumentException - if the given pattern is not compatible with the requirements of this measurement function

infiniteDistance

public BitDistance infiniteDistance()

Description copied from interface: Distance

Provides an infinite distance.

Returns:

an infinite distance

nullDistance

public BitDistance nullDistance()

Description copied from interface: Distance

Provides a null distance.

Returns:

a null distance

undefinedDistance

public BitDistance undefinedDistance()

Description copied from interface: Distance

Provides an undefined distance.

Returns:

an undefined distance

getPattern

public Pattern getPattern()

Description copied from class: AbstractDistance

Get the pattern accepted by this distance

Specified by:

getPattern in class AbstractDistance<BitDistance>

Returns:

Pattern

isInfiniteDistance

public boolean isInfiniteDistance()

Description copied from interface: Distance

Returns true, if the distance is an infinite distance, false otherwise.

Specified by:

isInfiniteDistance in interface Distance<BitDistance>

Overrides:

isInfiniteDistance in class AbstractDistance<BitDistance>

Returns:

true, if the distance is an infinite distance, false otherwise

isNullDistance

public boolean isNullDistance()

Description copied from interface: Distance

Returns true, if the distance is a null distance, false otherwise.

Specified by:

isNullDistance in interface Distance<BitDistance>

Overrides:

isNullDistance in class AbstractDistance<BitDistance>

Returns:

true, if the distance is a null distance, false otherwise

isUndefinedDistance

public boolean isUndefinedDistance()

Description copied from interface: Distance

Returns true, if the distance is an undefined distance, false otherwise.

Specified by:

isUndefinedDistance in interface Distance<BitDistance>

Overrides:

isUndefinedDistance in class AbstractDistance<BitDistance>

Returns:

true, if the distance is an undefined distance, false otherwise

toString

public String toString()

Description copied from interface: Distance

Any implementing class should implement a proper toString-method for printing the result-values.

Specified by:

toString in interface Distance<BitDistance>

Overrides:

toString in class Object

Returns:

String a human-readable representation of the Distance

hashCode

public int hashCode()

Description copied from class: AbstractDistance

Any extending class should implement a proper hashCode method.

Specified by:

hashCode in class AbstractDistance<BitDistance>

equals

public boolean equals(Object obj)

Description copied from class: AbstractDistance

Returns true if this == o has the value true or o is not null and o is of the same class as this instance and this.compareTo(o) is 0, false otherwise.

Overrides:

equals in class AbstractDistance<BitDistance>