package org.junit.runner.manipulation;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.junit.runner.Description;
public final class Orderer {
private final Ordering ordering;
Orderer(Ordering delegate) {
this.ordering = delegate;
}
public List<Description> order(Collection<Description> descriptions)
throws InvalidOrderingException {
List<Description> inOrder = ordering.orderItems(
Collections.unmodifiableCollection(descriptions));
if (!ordering.validateOrderingIsCorrect()) {
return inOrder;
}
Set<Description> uniqueDescriptions = new HashSet<Description>(descriptions);
if (!uniqueDescriptions.containsAll(inOrder)) {
throw new InvalidOrderingException("Ordering added items");
}
Set<Description> resultAsSet = new HashSet<Description>(inOrder);
if (resultAsSet.size() != inOrder.size()) {
throw new InvalidOrderingException("Ordering duplicated items");
} else if (!resultAsSet.containsAll(uniqueDescriptions)) {
throw new InvalidOrderingException("Ordering removed items");
}
return inOrder;
}
public void apply(Object target) throws InvalidOrderingException {
if (target instanceof Orderable) {
Orderable orderable = (Orderable) target;
orderable.order(this);
}
}
}