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package Sorts;

import static Sorts.SortUtils.*;

/**

* @author Varun Upadhyay (https://github.com/varunu28)

* @author Podshivalov Nikita (https://github.com/nikitap492)

* @see SortAlgorithm

*/

class BubbleSort implements SortAlgorithm {

/**

* Implements generic bubble sort algorithm.

*

* @param array the array to be sorted.

* @param <T> the type of elements in the array.

* @return the sorted array.

*/

@Override

public <T extends Comparable<T>> T[] sort(T[] array) {

for (int i = 0, size = array.length; i < size - 1; ++i) {

boolean swapped = false;

for (int j = 0; j < size - 1 - i; ++j) {

if (greater(array[j], array[j + 1])) {

swap(array, j, j + 1);

swapped = true;

}

}

if (!swapped) {

break;

}

}

return array;

}

/** Driver Code */

public static void main(String[] args) {

Integer[] integers = {4, 23, 6, 78, 1, 54, 231, 9, 12};

BubbleSort bubbleSort = new BubbleSort();

bubbleSort.sort(integers);

for (int i = 0; i < integers.length - 1; ++i) {

assert integers[i] <= integers[i + 1];

}

print(integers); /* output: [1, 4, 6, 9, 12, 23, 54, 78, 231] */

String[] strings = {"c", "a", "e", "b", "d"};

bubbleSort.sort(strings);

for (int i = 0; i < strings.length - 1; i++) {

assert strings[i].compareTo(strings[i + 1]) <= 0;

}

print(bubbleSort.sort(strings)); /* output: [a, b, c, d, e] */

}

}