/*-
 * #%L
 * Image processing operations for SciJava Ops.
 * %%
 * Copyright (C) 2014 - 2024 SciJava developers.
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 * modification, are permitted provided that the following conditions are met:
 * 
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 *    this list of conditions and the following disclaimer.
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 *    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
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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package org.scijava.ops.image.coloc;

import java.util.Random;

import net.imglib2.IterableInterval;
import net.imglib2.util.Intervals;
import net.imglib2.util.Util;

/**
 * Utility class for coloc ops.
 *
 * @author Ellen Arena
 */
public final class ColocUtil {

	private ColocUtil() {
		// prevent instantiation of utility class
	}

	public static boolean sameIterationOrder(Iterable<?> i1, Iterable<?> i2) {
		if (!(i1 instanceof IterableInterval) ||
			!(i2 instanceof IterableInterval))
		{
			return true;
		}
        var ii1 = (IterableInterval<?>) i1;
        var ii2 = (IterableInterval<?>) i2;
		return Intervals.equalDimensions(ii1, ii2) && Util.equalIterationOrder(ii1,
			ii2);
	}

	/** Fisher-Yates shuffle. */
	public static void shuffle(int[] array, Random rnd) {
		final var size = array.length;
		for (var i = size - 1; i > 0; i--) {
			final var j = rnd.nextInt(i + 1);
			final var v = array[i];
			array[i] = array[j];
			array[j] = v;
		}
	}
}
