/*
* 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 a float array. Please note that for most applications
* the precision of floats should be high enough. The highest precision is provided by
* {@link com.rapidminer.example.table.DoubleArrayDataRow}s but these need the double amount compared
* to these float representations which are therefore a good trade-off between precision and memory usage.
*
* @author Ingo Mierswa
* @version $Id: FloatArrayDataRow.java,v 1.4 2008/05/09 19:22:44 ingomierswa Exp $
*/
public class FloatArrayDataRow extends DataRow {
private static final long serialVersionUID = -3691818538613297744L;
/** Holds the data for all attributes. */
private float[] data;
/** Creates a new data row backed by an primitive array. */
public FloatArrayDataRow(float[] data) {
this.data = data;
}
/** Returns the desired data for the given index. */
protected double get(int index, double defaultValue) {
return data[index];
}
/** Sets the given data for the given index. */
protected void set(int index, double value, double defaultValue) {
data[index] = (float)value;
}
/**
* Creates a new array of the given size if necessary and copies the data
* into the new array.
*/
protected void ensureNumberOfColumns(int numberOfColumns) {
if (data.length >= numberOfColumns)
return;
float[] newData = new float[numberOfColumns];
System.arraycopy(data, 0, newData, 0, data.length);
data = newData;
}
/** Does nothing. */
public void trim() {}
/** Returns a string representation of the data row. */
public String toString() {
StringBuffer result = new StringBuffer();
for (int i = 0; i < data.length; i++)
result.append((i == 0 ? "" : ",") + data[i]);
return result.toString();
}
}