@Test
public void groupBy() {
ImmutableMap<String, Integer> map = this.newMapWithKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
Function<Integer, Boolean> isOddFunction = object -> IntegerPredicates.isOdd().accept(object);
Multimap<Boolean, Integer> expected;
switch (map.size()) {
case 1:
expected = FastListMultimap.newMultimap(Tuples.pair(Boolean.TRUE, 1));
break;
case 2:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1), Tuples.pair(Boolean.FALSE, 2));
break;
case 3:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1),
Tuples.pair(Boolean.TRUE, 3),
Tuples.pair(Boolean.FALSE, 2));
break;
case 4:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1),
Tuples.pair(Boolean.TRUE, 3),
Tuples.pair(Boolean.FALSE, 2),
Tuples.pair(Boolean.FALSE, 4));
break;
default:
expected = FastListMultimap.newMultimap();
break;
}
Multimap<Boolean, Integer> actual = map.groupBy(isOddFunction);
Assert.assertEquals(HashBagMultimap.newMultimap(expected), HashBagMultimap.newMultimap(actual));
Multimap<Boolean, Integer> actualFromTarget =
map.groupBy(isOddFunction, FastListMultimap.<Boolean, Integer>newMultimap());
Assert.assertEquals(
HashBagMultimap.newMultimap(expected), HashBagMultimap.newMultimap(actualFromTarget));
}
@Test
public void groupByEach() {
ImmutableBag<Integer> immutableBag = this.newBag().collect(Integer::valueOf);
MutableMultimap<Integer, Integer> expected = HashBagMultimap.newMultimap();
int keys = this.numKeys();
immutableBag.forEachWithOccurrences(
(each, parameter) -> {
HashBag<Integer> bag = HashBag.newBag();
Interval.fromTo(each, keys)
.forEach((int eachInt) -> bag.addOccurrences(eachInt, eachInt));
expected.putAll(-each, bag);
});
Multimap<Integer, Integer> actual = immutableBag.groupByEach(new NegativeIntervalFunction());
Assert.assertEquals(expected, actual);
Multimap<Integer, Integer> actualWithTarget =
immutableBag.groupByEach(
new NegativeIntervalFunction(), HashBagMultimap.<Integer, Integer>newMultimap());
Assert.assertEquals(expected, actualWithTarget);
}
@Test
public void groupBy() {
FastList<Integer> iterable =
FastList.newWithNValues(
10000000,
new Function0<Integer>() {
private int current;
public Integer value() {
if (this.current < 4) {
return Integer.valueOf(this.current++);
}
this.current = 0;
return Integer.valueOf(4);
}
});
iterable.shuffleThis();
Multimap<String, Integer> expected = iterable.toBag().groupBy(String::valueOf);
Multimap<String, Integer> expectedAsSet = iterable.toSet().groupBy(String::valueOf);
Multimap<String, Integer> result1 =
ParallelIterate.groupBy(iterable.toList(), String::valueOf, 100);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result1));
Multimap<String, Integer> result2 = ParallelIterate.groupBy(iterable.toList(), String::valueOf);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result2));
Multimap<String, Integer> result3 =
ParallelIterate.groupBy(
iterable.toSet(),
String::valueOf,
SynchronizedPutUnifiedSetMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expectedAsSet, result3);
Multimap<String, Integer> result4 =
ParallelIterate.groupBy(
iterable.toSet(),
String::valueOf,
SynchronizedPutUnifiedSetMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expectedAsSet, result4);
Multimap<String, Integer> result5 =
ParallelIterate.groupBy(
iterable.toSortedSet(),
String::valueOf,
SynchronizedPutUnifiedSetMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expectedAsSet, result5);
Multimap<String, Integer> result6 =
ParallelIterate.groupBy(
iterable.toSortedSet(),
String::valueOf,
SynchronizedPutUnifiedSetMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expectedAsSet, result6);
Multimap<String, Integer> result7 =
ParallelIterate.groupBy(
iterable.toBag(),
String::valueOf,
SynchronizedPutHashBagMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expected, result7);
Multimap<String, Integer> result8 =
ParallelIterate.groupBy(
iterable.toBag(),
String::valueOf,
SynchronizedPutHashBagMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expected, result8);
Multimap<String, Integer> result9 =
ParallelIterate.groupBy(iterable.toList().toImmutable(), String::valueOf);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result9));
Multimap<String, Integer> result10 =
ParallelIterate.groupBy(iterable.toSortedList(), String::valueOf, 100);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result10));
Multimap<String, Integer> result11 =
ParallelIterate.groupBy(iterable.toSortedList(), String::valueOf);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result11));
Multimap<String, Integer> result12 =
ParallelIterate.groupBy(
iterable,
String::valueOf,
MultiReaderFastListMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result12));
Multimap<String, Integer> result13 =
ParallelIterate.groupBy(
iterable, String::valueOf, MultiReaderFastListMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expected, HashBagMultimap.newMultimap(result13));
Multimap<String, Integer> result14 =
ParallelIterate.groupBy(
iterable,
String::valueOf,
MultiReaderHashBagMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expected, result14);
Multimap<String, Integer> result15 =
ParallelIterate.groupBy(
iterable, String::valueOf, MultiReaderHashBagMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expected, result15);
Multimap<String, Integer> result16 =
ParallelIterate.groupBy(
iterable,
String::valueOf,
MultiReaderUnifiedSetMultimap.<String, Integer>newMultimap(),
100);
Assert.assertEquals(expectedAsSet, result16);
Multimap<String, Integer> result17 =
ParallelIterate.groupBy(
iterable,
String::valueOf,
MultiReaderUnifiedSetMultimap.<String, Integer>newMultimap());
Assert.assertEquals(expectedAsSet, result17);
}
public <V> HashBagMultimap<V, T> groupByEach(
Function<? super T, ? extends Iterable<V>> function) {
return this.groupByEach(function, HashBagMultimap.<V, T>newMultimap());
}
public <V> HashBagMultimap<V, T> groupBy(Function<? super T, ? extends V> function) {
return this.groupBy(function, HashBagMultimap.<V, T>newMultimap());
}