com.rapidminer.example.table
Class AbstractSparseArrayDataRow

java.lang.Object
  com.rapidminer.example.table.DataRow
      com.rapidminer.example.table.AbstractSparseArrayDataRow

All Implemented Interfaces:

SparseDataRow, java.io.Serializable

Direct Known Subclasses:

BooleanSparseArrayDataRow, ByteSparseArrayDataRow, DoubleSparseArrayDataRow, FloatSparseArrayDataRow, IntSparseArrayDataRow, LongSparseArrayDataRow, ShortSparseArrayDataRow

public abstract class AbstractSparseArrayDataRow
extends DataRow
implements SparseDataRow

Implementation of DataRow that is backed by primitive arrays. Should always be used if more than 50% of the data is sparse. As fast (or even faster than map implementation) but needs considerably less memory.

Author:

Niraj Aswani, Julien Nioche, Ingo Mierswa, Shevek Exp $

See Also:

Serialized Form

Constructor Summary

AbstractSparseArrayDataRow()
Creates an empty sparse array data row with size 0.

AbstractSparseArrayDataRow(int size)
Creates a sparse array data row of the given size.

Method Summary

void	ensureNumberOfColumns(int numberOfColumns) Does nothing.
protected double	get(int val, double defaultValue) Returns the desired data for the given attribute.
protected abstract double[]	getAllValues()
int[]	getNonDefaultIndices() Returns an array of all attribute indices with corresponding non-default values.
double[]	getNonDefaultValues() Returns an array of all non-default attribute values.
protected abstract double	getValue(int index)
protected abstract void	removeValue(int index)
protected abstract void	resizeValues(int length)
protected void	set(int index, double value, double defaultValue) Sets the given data for the given attribute.
protected abstract void	setValue(int index, double value)
protected void	swap(int a, int b) Swaps x[a] with x[b].
protected abstract void	swapValues(int a, int b)
java.lang.String	toString() Returns a string representation of the data row.
void	trim() Trims the data row to the number of actually used elements.

Methods inherited from class com.rapidminer.example.table.DataRow

get, set

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractSparseArrayDataRow

public AbstractSparseArrayDataRow()

Creates an empty sparse array data row with size 0.

AbstractSparseArrayDataRow

public AbstractSparseArrayDataRow(int size)

Creates a sparse array data row of the given size.

Method Detail

removeValue

protected abstract void removeValue(int index)

resizeValues

protected abstract void resizeValues(int length)

setValue

protected abstract void setValue(int index,
                                 double value)

getValue

protected abstract double getValue(int index)

swapValues

protected abstract void swapValues(int a,
                                   int b)

getAllValues

protected abstract double[] getAllValues()

swap

protected void swap(int a,
                    int b)

Swaps x[a] with x[b].

get

protected double get(int val,
                     double defaultValue)

Returns the desired data for the given attribute.

Specified by:

get in class DataRow

set

protected void set(int index,
                   double value,
                   double defaultValue)

Sets the given data for the given attribute.

Specified by:

set in class DataRow

getNonDefaultIndices

public int[] getNonDefaultIndices()

Description copied from interface: SparseDataRow

Returns an array of all attribute indices with corresponding non-default values.

Specified by:

getNonDefaultIndices in interface SparseDataRow

getNonDefaultValues

public double[] getNonDefaultValues()

Description copied from interface: SparseDataRow

Returns an array of all non-default attribute values.

Specified by:

getNonDefaultValues in interface SparseDataRow

ensureNumberOfColumns

public void ensureNumberOfColumns(int numberOfColumns)

Does nothing.

Specified by:

ensureNumberOfColumns in class DataRow

trim

public void trim()

Trims the data row to the number of actually used elements.

Specified by:

trim in class DataRow

toString

public java.lang.String toString()

Returns a string representation of the data row.

Specified by:

toString in class DataRow