/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.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.generator;

import java.util.logging.Level;

import com.rapidminer.tools.LogService;

/**
 * Creates the reciprocal value of all input attributes. If the generator is
 * bounded, the values are bounded by the biggest and smallest possible values.
 * 
 * @author Simon Fischer, Ingo Mierswa
 *          ingomierswa Exp $
 */
public class ReciprocalValueGenerator extends SingularNumericalGenerator {

	public static final String FUNCTION_NAMES[] = { "1/" };

	public ReciprocalValueGenerator() {}

	@Override
	public FeatureGenerator newInstance() {
		return new ReciprocalValueGenerator();
	}

	@Override
	public double calculateValue(double value) {
		return 1.0d / value;
	}

	@Override
	public void setFunction(String name) {
		for (int i = 0; i < FUNCTION_NAMES.length; i++) {
			if (FUNCTION_NAMES[i].equals(name))
				return;
		}
		//LogService.getGlobal().log("Illegal function name '" + name + "' for " + getClass().getName() + ".", LogService.ERROR);
		LogService.getRoot().log(Level.SEVERE, "com.rapidminer.generator.ReciprocalValueGenerator.illegal_function_name",
				new Object[] {name, getClass().getName()});
	}

	@Override
	public String getFunction() {
		return FUNCTION_NAMES[0];
	}
}