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package org.junit.runner.manipulation;
import java.util.Comparator;
import org.junit.runner.Description;
/**
* A <code>Sorter</code> orders tests. In general you will not need
* to use a <code>Sorter</code> directly. Instead, use {@link org.junit.runner.Request#sortWith(Comparator)}.
*
*
*/
public class Sorter implements Comparator<Description> {
/**
* NULL is a <code>Sorter</code> that leaves elements in an undefined order
*/
public static Sorter NULL= new Sorter(new Comparator<Description>() {
public int compare(Description o1, Description o2) {
return 0;
}});
private final Comparator<Description> fComparator;
/**
* Creates a <code>Sorter</code> that uses <code>comparator</code>
* to sort tests
* @param comparator the {@link Comparator} to use when sorting tests
*/
public Sorter(Comparator<Description> comparator) {
fComparator= comparator;
}
/**
* Sorts the test in <code>runner</code> using <code>comparator</code>
* @param object
*/
public void apply(Object object) {
if (object instanceof Sortable) {
Sortable sortable = (Sortable) object;
sortable.sort(this);
}
}
public int compare(Description o1, Description o2) {
return fComparator.compare(o1, o2);
}
}
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