de.lmu.ifi.dbs.elki.data

Class ByteVector

java.lang.Object

de.lmu.ifi.dbs.elki.data.AbstractNumberVector<Byte>

de.lmu.ifi.dbs.elki.data.ByteVector

All Implemented Interfaces:

FeatureVector<Byte>, NumberVector<Byte>, SpatialComparable

public class ByteVector
extends AbstractNumberVector<Byte>

A ByteVector stores the data using bytes. This is beneficial e.g. when using SIFT vectors based on byte values.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ByteVector.Factory Factory for Byte vectors.
static class	ByteVector.ShortSerializer Serialization class for dense Byte vectors with up to Short.MAX_VALUE dimensions, by using a short for storing the dimensionality.
static class	ByteVector.SmallSerializer Serialization class for dense Byte vectors with up to 127 dimensions, by using a byte for storing the dimensionality.

Field Summary

Fields

Modifier and Type	Field and Description
static ByteBufferSerializer<ByteVector>	BYTE_SERIALIZER Serializer for up to 127 dimensions.
static ByteBufferSerializer<ByteVector>	SHORT_SERIALIZER Serializer for up to 2^15-1 dimensions.
static ByteVector.Factory	STATIC Static instance (object factory).
private byte[]	values Keeps the values of the real vector.

Fields inherited from class de.lmu.ifi.dbs.elki.data.AbstractNumberVector

ATTRIBUTE_SEPARATOR

Constructor Summary

Constructors

Modifier	Constructor and Description
	ByteVector(byte[] values) Provides an ByteVector consisting of the given Byte values.
private	ByteVector(byte[] values, boolean nocopy) Private constructor.

Method Summary

Methods

Modifier and Type	Method and Description
byte	byteValue(int dimension) Returns the value in the specified dimension as byte.
double	doubleValue(int dimension) Returns the value in the specified dimension as double.
Vector	getColumnVector() Returns a Vector representing in one column and getDimensionality() rows the values of this NumberVector of V.
int	getDimensionality() The dimensionality of the vector space where of this FeatureVector of V is an element.
Byte	getValue(int dimension) Deprecated.
byte[]	getValues() Get a copy of the raw byte[] array.
long	longValue(int dimension) Returns the value in the specified dimension as long.
String	toString() Returns a String representation of the FeatureVector of V as a line that is suitable to be printed in a sequential file.

Methods inherited from class de.lmu.ifi.dbs.elki.data.AbstractNumberVector

floatValue, getMax, getMin, intValue, shortValue

Methods inherited from class java.lang.Object

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

Field Detail

STATIC

public static final ByteVector.Factory STATIC

Static instance (object factory).

BYTE_SERIALIZER

public static final ByteBufferSerializer<ByteVector> BYTE_SERIALIZER

Serializer for up to 127 dimensions.

SHORT_SERIALIZER

public static final ByteBufferSerializer<ByteVector> SHORT_SERIALIZER

Serializer for up to 2^15-1 dimensions.

values

private final byte[] values

Keeps the values of the real vector.

Constructor Detail

ByteVector

private ByteVector(byte[] values,
          boolean nocopy)

Private constructor. NOT for public use.

Parameters:

values - Value data

nocopy - Flag to use without copying.

ByteVector

public ByteVector(byte[] values)

Provides an ByteVector consisting of the given Byte values.

Parameters:

values - the values to be set as values of the ByteVector

Method Detail

getDimensionality

public int getDimensionality()

Description copied from interface: FeatureVector

The dimensionality of the vector space where of this FeatureVector of V is an element.

Returns:

the number of dimensions of this FeatureVector of V

getValue

@Deprecated
public Byte getValue(int dimension)

Deprecated.

Description copied from interface: FeatureVector

Returns the value in the specified dimension.

Parameters:

dimension - the desired dimension, where 0 ≤ dimension ≤ this.getDimensionality()-1

Returns:

the value in the specified dimension

doubleValue

public double doubleValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as double. Note: this might seem redundant with respect to getValue(dim).doubleValue(), but usually this is much more efficient due to boxing/unboxing cost.

Parameters:

dimension - the desired dimension, where 0 ≤ dimension < this.getDimensionality()

Returns:

the value in the specified dimension

longValue

public long longValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as long. Note: this might seem redundant with respect to getValue(dim).longValue(), but usually this is much more efficient due to boxing/unboxing cost.

Parameters:

dimension - the desired dimension, where 0 ≤ dimension < this.getDimensionality()

Returns:

the value in the specified dimension

byteValue

public byte byteValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as byte. Note: this might seem redundant with respect to getValue(dim).byteValue(), but usually this is much more efficient due to boxing/unboxing cost.

Specified by:

byteValue in interface NumberVector<Byte>

Overrides:

byteValue in class AbstractNumberVector<Byte>

Parameters:

dimension - the desired dimension, where 0 ≤ dimension < this.getDimensionality()

Returns:

the value in the specified dimension

getValues

public byte[] getValues()

Get a copy of the raw byte[] array.

Returns:

copy of values array.

getColumnVector

public Vector getColumnVector()

Description copied from interface: NumberVector

Returns a Vector representing in one column and getDimensionality() rows the values of this NumberVector of V.

Returns:

a Matrix representing in one column and getDimensionality() rows the values of this NumberVector of V

toString

public String toString()

Description copied from interface: FeatureVector

Returns a String representation of the FeatureVector of V as a line that is suitable to be printed in a sequential file.

Specified by:

toString in interface FeatureVector<Byte>

Overrides:

toString in class Object

Returns:

a String representation of the FeatureVector of V