mobios.type
Class DoubleVector

java.lang.Object
  mobios.type.IndexObject
      mobios.type.DoubleVector

All Implemented Interfaces:

Externalizable, Serializable, Comparable<IndexObject>

Direct Known Subclasses:

Spectra

public class DoubleVector
extends IndexObject

This class represents space vectors, where each element is a double.

Version:

2003.06.06

Author:

Rui Mao, Willard

See Also:

Serialized Form

Constructor Summary

DoubleVector()
TODO

DoubleVector(mobios.db.Table table, int rowID, double[] data)
Builds an instance from a double array.

DoubleVector(mobios.db.Table table, int rowID, String dataString)
Builds an instance from a space-separated String of doubles.

Method Summary

int	compareTo(DoubleVector oThat)
int	compareTo(IndexObject oThat)
boolean	equals(Object that)
IndexObject[]	expand() This method is necessary to implement bucketing, so that similar objects are only stored once in the database.
double[]	getData()
int	hashCode()
void	readExternal(ObjectInput in)
int	size()
String	toString() all implementing classes are required to override toString
void	writeExternal(ObjectOutput out)

Methods inherited from class mobios.type.IndexObject

getRowID, setRowID, setRowIDLength

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DoubleVector

public DoubleVector()

TODO

DoubleVector

public DoubleVector(mobios.db.Table table,
                    int rowID,
                    String dataString)

Builds an instance from a space-separated String of doubles.

Parameters:

table -

rowID -

dataString -

DoubleVector

public DoubleVector(mobios.db.Table table,
                    int rowID,
                    double[] data)

Builds an instance from a double array.

Parameters:

rowID -

data - the double array containning all the elements. cannot be null

Method Detail

getData

public double[] getData()

Returns:

the double array

size

public int size()

Specified by:

size in class IndexObject

Returns:

the dimension ( length) of the vector

expand

public IndexObject[] expand()

Description copied from class: IndexObject

This method is necessary to implement bucketing, so that similar objects are only stored once in the database. If you do not want to implement bucketing for your object, you can just return an array of length one containing this object.

Specified by:

expand in class IndexObject

Returns:

an array of IndexObjects

compareTo

public int compareTo(IndexObject oThat)

Specified by:

compareTo in interface Comparable<IndexObject>

Specified by:

compareTo in class IndexObject

compareTo

public int compareTo(DoubleVector oThat)

Parameters:

oThat -

Returns:

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Description copied from class: IndexObject

all implementing classes are required to override toString

Specified by:

toString in class IndexObject

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class IndexObject

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class IndexObject

Throws:

IOException