/*
* Copyright (c) 2012, Søren Atmakuri Davidsen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package fuzzy4j.sets;
import fuzzy4j.aggregation.Minimum;
import fuzzy4j.util.FuzzyUtil;
import fuzzy4j.util.SimpleInterval;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
/**
* @author Soren A. Davidsen <soren@tanesha.net>
*/
public class SingletonsFunction implements FuzzyFunction, SupportAware {
private double defaultValue = 0.0;
private Point[] elements;
public SingletonsFunction(double defaultValue, Point... elements) {
this.defaultValue = defaultValue;
this.elements = elements;
}
public SingletonsFunction(double... points) {
elements = new Point[points.length];
for (int i = 0; i < points.length; i++)
elements[i] = new Point(points[i], 1.0);
}
public SingletonsFunction(Point... elements) {
this.elements = elements;
}
@Override
public double apply(double x) {
for (int i = 0; i < elements.length; i++)
if (elements[i].x == x)
return elements[i].y;
return defaultValue;
}
@Override
public SimpleInterval support() {
double min = Double.POSITIVE_INFINITY, max = Double.NEGATIVE_INFINITY;
for (Point p : elements) {
min = Math.min(p.x, min);
max = Math.max(p.x, max);
}
return new SimpleInterval(true, min, max, true);
}
public Iterator<Point> iterator() {
return Arrays.asList(elements).iterator();
}
}