/**
 * Copyright (C) 2001-2017 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.example;

import com.rapidminer.tools.LogService;

import java.util.logging.Level;


/**
 * The superclass for all attribute statistics objects.
 * 
 * @author Ingo Mierswa
 */
public class UnknownStatistics implements Statistics {

	private static final long serialVersionUID = 217609774484151520L;

	private int unknownCounter = 0;

	public UnknownStatistics() {}

	/** Clone constructor. */
	private UnknownStatistics(UnknownStatistics other) {
		this.unknownCounter = other.unknownCounter;
	}

	@Override
	public Object clone() {
		return new UnknownStatistics(this);
	}

	@Override
	public void startCounting(Attribute attribute) {
		this.unknownCounter = 0;
	}

	@Override
	public void count(double value, double weight) {
		if (Double.isNaN(value)) {
			unknownCounter++;
		}
	}

	@Override
	public double getStatistics(Attribute attribute, String statisticsName, String parameter) {
		if (UNKNOWN.equals(statisticsName)) {
			return unknownCounter;
		} else {
			// LogService.getGlobal().log("Cannot calculate statistics, unknown type: " +
			// statisticsName, LogService.WARNING);
			LogService.getRoot().log(Level.WARNING,
					"com.rapidminer.example.UnknownStatistics.calculating_statistics_unknown_type_error", statisticsName);
			return Double.NaN;
		}
	}

	@Override
	public boolean handleStatistics(String statisticsName) {
		return UNKNOWN.equals(statisticsName);
	}

	@Override
	public String toString() {
		return "unknown: " + this.unknownCounter;
	}
}