/*
 *  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.operator.features.transformation;

/**
 * This class holds information about one eigenvector and eigenvalue.
 *  
 * @author Ingo Mierswa
 */
public class WeightVector implements ComponentVector {
        
    private static final long serialVersionUID = -8280081065217261596L;
    
	private double eigenvalue;
    private double[] weights;

    public WeightVector(double[] weights, double eigenvalue) {
        this.weights = weights;
        this.eigenvalue = eigenvalue;
    }

    public double[] getWeights() { 
        return this.weights; 
    }
    
    public double getEigenvalue() { 
        return this.eigenvalue; 
    }

    public double[] getVector() {
        return getWeights();
    }

    public int compareTo(ComponentVector o) {
        return -1 * Double.compare(this.eigenvalue, o.getEigenvalue());
    }
    
    @Override
	public boolean equals(Object o) {
    	if (!(o instanceof WeightVector)) {
    		return false;
    	} else {
    		WeightVector ev = (WeightVector)o;
    		return (this.eigenvalue == ev.eigenvalue) && (this.weights == ev.weights);
    	}
    }
    
    @Override
	public int hashCode() {
    	return Double.valueOf(this.eigenvalue).hashCode() ^ this.weights.hashCode();
    }
}