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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

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 * accompanied this code).

 *

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 *

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/*

 * @test

 * @bug 8068399

 * @summary structural most specific and stuckness

 */

import java.util.function.Function;

import java.util.stream.IntStream;

import java.util.stream.Stream;

public class T8068399 {

    public static class Spectrum {

        public double[] getEnergy() {

            return new double[0];

        }

    }

    protected Spectrum spectrum;

    public static class Ref<T> {

        T value;

        public Ref() {

        }

        public Ref(T value) {

            this.value = value;

        }

        public boolean isNull() {

            return value == null;

        }

        public T get() {

            return value;

        }

        public void set(T value) {

            this.value = value;

        }

    }

    public static <T>T maxKey(Stream<T> stream, Function<T, Double> function) {

        Ref<Double> max = new Ref<>();

        Ref<T> index = new Ref<>();

        stream.forEach(v -> {

            Double value = function.apply(v);

            if (max.isNull() || value > max.get()) {

                max.set(value);

                index.set(v);

            }

        });

        return index.get();

    }

    public static int interpolate(int x, int x0, int x1, int y0, int y1) {

        return y0 + (x - x0) * (y1 - y0) / (x1 - x0);

    }

    public static double interpolate(double x, double x0, double x1, double y0, double y1) {

        return y0 + (x - x0) * (y1 - y0) / (x1 - x0);

    }

    protected int getXByFrequency(double frequency) {

        return (int) Math.round(interpolate(frequency,

                                            getMinSpectrumCoord(),

                                            getMaxSpectrumCoord(),

                                            0, getWidth()));

    }

    private int getWidth() {

        return 0;

    }

    private double getMaxSpectrumCoord() {

        return 0;

    }

    private double getMinSpectrumCoord() {

        return 0;

    }

    void foo() {

        int maxBpmIndex = 0;

        int xcur = getXByFrequency(maxKey(IntStream.range(0, maxBpmIndex).boxed(),

                                          i -> Math.abs(spectrum.getEnergy()[i])));

    }

    public static void main(String [] args) {

    }

}