Package elki.data

Class IntegerVector

java.lang.Object

elki.data.IntegerVector

All Implemented Interfaces:

FeatureVector<java.lang.Number>, NumberVector, SpatialComparable

public class IntegerVector
extends java.lang.Object
implements NumberVector

Vector type using int[] storage.

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	IntegerVector.Factory	Factory for integer vectors.
static class	IntegerVector.ShortSerializer	Serialization class for dense integer vectors with up to Short.MAX_VALUE dimensions, by using a short for storing the dimensionality.
static class	IntegerVector.SmallSerializer	Serialization class for dense integer vectors with up to 127 dimensions, by using a byte for storing the dimensionality.
static class	IntegerVector.VariableSerializer	Serialization class for variable dimensionality by using VarInt encoding.

Field Summary

Fields

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

Fields inherited from interface elki.data.FeatureVector

TYPE

Fields inherited from interface elki.data.NumberVector

ATTRIBUTE_SEPARATOR, FIELD, FIELD_1D, FIELD_2D, VARIABLE_LENGTH

Constructor Summary

Constructors

Modifier	Constructor	Description
	IntegerVector(int[] values)	Create an IntegerVector consisting of the given integer values.
private	IntegerVector(int[] values, boolean nocopy)	Private constructor.

Method Summary

Modifier and Type	Method	Description
double	doubleValue(int dimension)	Returns the value in the specified dimension as double.
int	getDimensionality()	The dimensionality of the vector space where of this FeatureVector of V is an element.
java.lang.Integer	getValue(int dimension)	Deprecated.
int	intValue(int dimension)	Returns the value in the specified dimension as int.
long	longValue(int dimension)	Returns the value in the specified dimension as long.
double[]	toArray()	Returns a double array copy of this vector.
java.lang.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 java.lang.Object

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

Methods inherited from interface elki.data.NumberVector

byteValue, floatValue, getMax, getMin, shortValue

Field Detail

STATIC

public static final IntegerVector.Factory STATIC

Static instance (object factory).

BYTE_SERIALIZER

public static final ByteBufferSerializer<IntegerVector> BYTE_SERIALIZER

Serializer for up to 127 dimensions.

SHORT_SERIALIZER

public static final ByteBufferSerializer<IntegerVector> SHORT_SERIALIZER

Serializer for up to 2^15-1 dimensions.

VARIABLE_SERIALIZER

public static final ByteBufferSerializer<IntegerVector> VARIABLE_SERIALIZER

Serializer using varint encoding.

values

private final int[] values

Keeps the values of the real vector.

Constructor Detail

IntegerVector

private IntegerVector(int[] values,
                      boolean nocopy)

Private constructor. NOT for public use.

Parameters:

values - Value data

nocopy - Flag to use without copying.

IntegerVector

public IntegerVector(int[] values)

Create an IntegerVector consisting of the given integer values.

Parameters:

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

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.

Specified by:

getDimensionality in interface FeatureVector<java.lang.Number>

Specified by:

getDimensionality in interface SpatialComparable

Returns:

the number of dimensions of this FeatureVector of V

getValue

@Deprecated
public java.lang.Integer getValue(int dimension)

Deprecated.

Returns the value of the specified attribute.

Specified by:

getValue in interface FeatureVector<java.lang.Number>

Specified by:

getValue in interface NumberVector

Parameters:

dimension - the selected attribute. Attributes are counted starting with 0.

Returns:

the value in the specified dimension

Throws:

java.lang.IllegalArgumentException - if the specified dimension is out of range of the possible attributes

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.

Specified by:

doubleValue in interface NumberVector

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.

Specified by:

longValue in interface NumberVector

Parameters:

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

Returns:

the value in the specified dimension

intValue

public int intValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as int.

Note: this might seem redundant with respect to getValue(dim).intValue(), but usually this is much more efficient due to boxing/unboxing cost.

Specified by:

intValue in interface NumberVector

Parameters:

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

Returns:

the value in the specified dimension

toArray

public double[] toArray()

Description copied from interface: NumberVector

Returns a double array copy of this vector.

Specified by:

toArray in interface NumberVector

Returns:

Copy as double[]

toString

public java.lang.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<java.lang.Number>

Overrides:

toString in class java.lang.Object

Returns:

a String representation of the FeatureVector of V