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