public void testCreateWithSize() {
Multiset<String> multiset = HashMultiset.create(50);
multiset.add("foo", 2);
multiset.add("bar");
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
}
/**
* @param scores
* @param restrictionSet
* @return intersection of set (Multiset<Integer>) and restrictionSet (if restrictionSet non-null
* & non-empty); otherwise return set
*/
public static Multiset<Integer> intersect(
final Multiset<Integer> scores, final Set<Integer> restrictionSet) {
if (restrictionSet != null && !restrictionSet.isEmpty()) {
int prevSize = scores.size();
Multiset<Integer> intersection = HashMultiset.create(scores);
intersection.retainAll(restrictionSet);
log.debug(
prevSize != 0
? ("Size saving by retainAll = "
+ (((prevSize - intersection.size()) * 100) / prevSize))
+ "%"
: "");
return intersection;
}
return scores;
}
public void testCreateWithComparator() {
Multiset<String> multiset = TreeMultiset.create(Collections.reverseOrder());
multiset.add("foo", 2);
multiset.add("bar");
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals("[foo x 2, bar]", multiset.toString());
}
@GwtIncompatible // SerializableTester
public void testSerializationIndirectSelfReference() {
Multiset<MultisetHolder> multiset = HashMultiset.create();
MultisetHolder holder = new MultisetHolder(multiset);
multiset.add(holder, 2);
Multiset<MultisetHolder> copy = SerializableTester.reserialize(multiset);
assertEquals(2, copy.size());
assertSame(copy, copy.iterator().next().member);
}
/** An implementation of {@link Multiset#equals}. */
static boolean equalsImpl(Multiset<?> multiset, Object object) {
if (object == multiset) {
return true;
}
if (object instanceof Multiset) {
Multiset<?> that = (Multiset<?>) object;
/*
* We can't simply check whether the entry sets are equal, since that
* approach fails when a TreeMultiset has a comparator that returns 0
* when passed unequal elements.
*/
if (multiset.size() != that.size() || multiset.entrySet().size() != that.entrySet().size()) {
return false;
}
for (Entry<?> entry : that.entrySet()) {
if (multiset.count(entry.getElement()) != entry.getCount()) {
return false;
}
}
return true;
}
return false;
}
@Override
public boolean equals(@Nullable Object object) {
if (object == this) {
return true;
}
if (object instanceof Multiset) {
Multiset<?> that = (Multiset<?>) object;
if (this.size() != that.size()) {
return false;
}
for (Entry<?> entry : that.entrySet()) {
if (count(entry.getElement()) != entry.getCount()) {
return false;
}
}
return true;
}
return false;
}
public void testCreateFromIterable() {
Multiset<String> multiset = HashMultiset.create(Arrays.asList("foo", "bar", "foo"));
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
}
public void testCreateFromIterable() {
Multiset<String> multiset = TreeMultiset.create(Arrays.asList("foo", "bar", "foo"));
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals("[bar, foo x 2]", multiset.toString());
}
