/*
 *  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.generator;

import com.rapidminer.example.Attribute;

/**
 * Helper class for attributes, their frequencies, and their evidences.
 * 
 * @author Ingo Mierswa
 * @version $Id: AttributePeak.java,v 1.3 2008/05/09 19:23:16 ingomierswa Exp $
 */
public class AttributePeak implements Comparable<AttributePeak> {

	private Attribute attribute;

	private double frequency;

	private double evidence;

	public AttributePeak(Attribute attribute, double frequency, double evidence) {
		this.attribute = attribute;
		this.frequency = frequency;
		this.evidence = evidence;
	}

	public Attribute getAttribute() {
		return attribute;
	}

	public double getFrequency() {
		return frequency;
	}

	public double getEvidence() {
		return evidence;
	}

	public int compareTo(AttributePeak p) {
		return (-1) * Double.compare(this.evidence, p.evidence);
	}
	
	public boolean equals(Object o) {
		if (!(o instanceof AttributePeak)) {
			return false;
		} else {
			AttributePeak peak = (AttributePeak)o;
			return (this.attribute.equals(peak.attribute)) && (this.frequency == peak.frequency);
		}
	}
	
	public int hashCode() {
		return this.attribute.hashCode() ^ Double.valueOf(this.frequency).hashCode();
	}
}