@Override
public Tuple2<HashMap<K, V>, HashMap<K, V>> partition(Predicate<? super Tuple2<K, V>> predicate) {
Objects.requireNonNull(predicate, "predicate is null");
final Tuple2<Iterator<Tuple2<K, V>>, Iterator<Tuple2<K, V>>> p =
iterator().partition(predicate);
return Tuple.of(HashMap.ofAll(p._1), HashMap.ofAll(p._2));
}
public static HashMap<Long, Long> factorization(long num) {
if (num == 1) {
return HashMap.empty();
} else {
return primeFactors(num)
.map(p -> HashMap.of(Tuple.of(p, 1L)).merge(factorization(num / p), (a, b) -> a + b))
.orElseGet(HashMap::empty);
}
}
@Test
public void shouldConvertToMap() {
final Value<Integer> value = of(1, 2, 3);
final Map<Integer, Integer> map = value.toMap(v -> Tuple.of(v, v));
if (value.isSingleValued()) {
assertThat(map).isEqualTo(HashMap.of(1, 1));
} else {
assertThat(map).isEqualTo(HashMap.empty().put(1, 1).put(2, 2).put(3, 3));
}
}
@Override
public <C> Map<C, HashMap<K, V>> groupBy(Function<? super Tuple2<K, V>, ? extends C> classifier) {
Objects.requireNonNull(classifier, "classifier is null");
return foldLeft(
HashMap.empty(),
(map, entry) -> {
final C key = classifier.apply(entry);
final HashMap<K, V> values =
map.get(key).map(entries -> entries.put(entry)).orElse(HashMap.of(entry));
return map.put(key, values);
});
}
@Override
public HashMap<K, V> takeRight(int n) {
if (trie.size() <= n) {
return this;
} else {
return HashMap.ofAll(trie.iterator().takeRight(n));
}
}
@Override
public HashMap<K, V> dropRight(int n) {
if (n <= 0) {
return this;
}
if (n >= length()) {
return empty();
}
return HashMap.ofAll(iterator().dropRight(n));
}
@Override
public <U, W> HashMap<U, W> map(
BiFunction<? super K, ? super V, ? extends Tuple2<? extends U, ? extends W>> mapper) {
Objects.requireNonNull(mapper, "mapper is null");
return foldLeft(
HashMap.empty(),
(acc, entry) ->
acc.put(
entry.flatMap((BiFunction<K, V, Tuple2<? extends U, ? extends W>>) mapper::apply)));
}
@Override
public HashMap<K, V> merge(Map<? extends K, ? extends V> that) {
Objects.requireNonNull(that, "that is null");
if (isEmpty()) {
return HashMap.ofAll(that);
} else if (that.isEmpty()) {
return this;
} else {
return that.foldLeft(this, (map, entry) -> !map.containsKey(entry._1) ? map.put(entry) : map);
}
}
public Map<String, String> getResponseHeaders(Request request) {
String fallbackAllowOriginValue = allowedOrigins.mkString(",");
return HashMap.of(
ACCESS_CONTROL_ALLOW_ORIGIN_HEADER,
isAllowed(request)
? request.getHeader(ORIGIN_HEADER).getOrElse(fallbackAllowOriginValue)
: fallbackAllowOriginValue,
ACCESS_CONTROL_ALLOW_CREDENTIALS_HEADER, "true",
ACCESS_CONTROL_EXPOSE_HEADERS_HEADER, "*",
ACCESS_CONTROL_ALLOW_HEADERS_HEADER, "*",
ACCESS_CONTROL_MAX_AGE_HEADER, "1800",
ACCESS_CONTROL_ALLOW_METHODS_HEADER, "*");
}
@Override
public HashMap<K, V> filter(Predicate<? super Tuple2<K, V>> predicate) {
Objects.requireNonNull(predicate, "predicate is null");
return foldLeft(
HashMap.<K, V>empty(),
(acc, entry) -> {
if (predicate.test(entry)) {
return acc.put(entry);
} else {
return acc;
}
});
}
@Override
public <U, W> HashMap<U, W> flatMap(
BiFunction<
? super K,
? super V,
? extends java.lang.Iterable<? extends Tuple2<? extends U, ? extends W>>>
mapper) {
Objects.requireNonNull(mapper, "mapper is null");
return foldLeft(
HashMap.<U, W>empty(),
(acc, entry) -> {
for (Tuple2<? extends U, ? extends W> mappedEntry : mapper.apply(entry._1, entry._2)) {
acc = acc.put(mappedEntry);
}
return acc;
});
}
@Override
public <U extends V> HashMap<K, V> merge(
Map<? extends K, U> that, BiFunction<? super V, ? super U, ? extends V> collisionResolution) {
Objects.requireNonNull(that, "that is null");
Objects.requireNonNull(collisionResolution, "collisionResolution is null");
if (isEmpty()) {
return HashMap.ofAll(that);
} else if (that.isEmpty()) {
return this;
} else {
return that.foldLeft(
this,
(map, entry) -> {
final K key = entry._1;
final U value = entry._2;
final V newValue =
map.get(key).map(v -> (V) collisionResolution.apply(v, value)).orElse(value);
return map.put(key, newValue);
});
}
}
@Override
public HashMap<K, V> takeWhile(Predicate<? super Tuple2<K, V>> predicate) {
Objects.requireNonNull(predicate, "predicate is null");
final HashMap<K, V> taken = HashMap.ofAll(iterator().takeWhile(predicate));
return taken.length() == length() ? this : taken;
}
@Override
public HashMap<K, V> scan(
Tuple2<K, V> zero,
BiFunction<? super Tuple2<K, V>, ? super Tuple2<K, V>, ? extends Tuple2<K, V>> operation) {
return HashMap.ofAll(scanLeft(zero, operation));
}
@Override
public HashMap<K, V> clear() {
return HashMap.empty();
}
@Override
public HashMap<K, V> distinctBy(Comparator<? super Tuple2<K, V>> comparator) {
Objects.requireNonNull(comparator, "comparator is null");
return HashMap.ofAll(iterator().distinctBy(comparator));
}
@Override
public HashMap<K, V> dropWhile(Predicate<? super Tuple2<K, V>> predicate) {
Objects.requireNonNull(predicate, "predicate is null");
return HashMap.ofAll(iterator().dropWhile(predicate));
}
@Override
public <U> HashMap<K, V> distinctBy(Function<? super Tuple2<K, V>, ? extends U> keyExtractor) {
Objects.requireNonNull(keyExtractor, "keyExtractor is null");
return HashMap.ofAll(iterator().distinctBy(keyExtractor));
}
