/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.example.table;
/**
* 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
* @version $Id: DoubleSparseArrayDataRow.java,v 2.10 2006/03/21 15:35:39 ingomierswa
* Exp $
*/
public class DoubleSparseArrayDataRow extends AbstractSparseArrayDataRow {
private static final long serialVersionUID = 9137639592169696234L;
/** Stores the used attribute values. */
private double[] values;
/** Creates an empty sparse array data row with size 0. */
public DoubleSparseArrayDataRow() {
this(0);
}
/** Creates a sparse array data row of the given size. */
public DoubleSparseArrayDataRow(int size) {
super(size);
values = new double[size];
}
protected void swapValues(int a, int b) {
double tt = values[a];
values[a] = values[b];
values[b] = tt;
}
public void resizeValues(int length) {
double[] d = new double[length];
System.arraycopy(values, 0, d, 0, Math.min(values.length, length));
values = d;
}
public void removeValue(int index) {
System.arraycopy(values, index + 1, values, index, (values.length - (index + 1)));
}
/** Returns the desired data for the given attribute. */
public double getValue(int index) {
return values[index];
}
/** Sets the given data for the given attribute. */
public void setValue(int index, double v) {
values[index] = v;
}
protected double[] getAllValues() {
return this.values;
}
}