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package oracle.toplink.essentials.internal.helper;
/**
* INTERNAL:
*/
public class TOPSort {
public TOPSort() {
}
public static void quicksort(Object[] arrayToSort, int left, int right, TOPComparison compareOperator) {
if (left >= right) {
return;
}
swapElements(arrayToSort, left, (left + right) / 2);
int last = left;
for (int i = left + 1; i <= right; i++) {
if (compareOperator.compare(arrayToSort[i], arrayToSort[left]) < 0) {
swapElements(arrayToSort, ++last, i);
}
}
swapElements(arrayToSort, left, last);
quicksort(arrayToSort, left, last - 1, compareOperator);
quicksort(arrayToSort, last + 1, right, compareOperator);
}
public static void quicksort(Object[] arrayToSort, TOPComparison compareOperator) {
quicksort(arrayToSort, 0, arrayToSort.length - 1, compareOperator);
}
protected static void swapElements(Object[] arrayToSort, int index1, int index2) {
Object tempIndex = arrayToSort[index1];
arrayToSort[index1] = arrayToSort[index2];
arrayToSort[index2] = tempIndex;
}
}
