@Test
public void sortByExample4() {
List<Integer> example = asList(1, 3, 5, 2, 4, 6);
final List<String> expected = asList("1", "3", "5", "2", "4", "6");
assertEquals(
expected,
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("6", "5", "4", "3", "2", "1"),
Functions.<String>identity()));
assertEquals(
asList("3", "5", "4"),
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("5", "4", "3"),
Functions.<String>identity()));
assertEquals(
expected,
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("1", "2", "3", "4", "5", "6", "7", "8", "9"),
Functions.<String>identity()));
}
@Test
public void sortByExample1() {
List<Integer> example = asList(1, 3, 5, 2, 4, 6);
assertEquals(example, Algorithms.sortByExample(example, asList(6, 5, 4, 3, 2, 1)));
assertEquals(asList(3, 5, 4), Algorithms.sortByExample(example, asList(5, 4, 3)));
assertEquals(example, Algorithms.sortByExample(example, asList(1, 2, 3, 4, 5, 6, 7, 8, 9)));
}
@Test
public void sortByExample3() {
// We have the names of some people in the right order, but then we want to sort the actual
// Person objects
// into the same order. Providing a mapping function from the Person to his/her name is all we
// need.
final Person huey = new Person("huey");
final Person dewey = new Person("dewey");
final Person louie = new Person("louie");
List<String> example = asList("donald", huey.getName(), dewey.getName(), louie.getName());
assertEquals(
asList(huey, dewey, louie),
Algorithms.sortByExample(
example,
asList(dewey, louie, huey),
new Function<Person, String>() {
public String apply(Person p) {
return p.getName();
}
}));
}
