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using Mammoth.Couscous.java.lang;
using Mammoth.Couscous.java.util;
using Mammoth.Couscous.java.util.function;
using System.Linq;
namespace Mammoth.Couscous.org.zwobble.mammoth.@internal.util {
internal static class Lists {
internal static List<T> list<T>(params T[] values) {
return ToJava.ListToList(values);
}
internal static List<T> toList<T>(Iterable<T> iterable) {
return ToJava.ListToList(FromJava.IterableToEnumerable(iterable).ToList());
}
internal static List<U> eagerMap<T, U>(Iterable<T> iterable, Function<T, U> function) {
var result = FromJava.IterableToEnumerable(iterable)
.Select(function.apply)
.ToList();
return ToJava.ListToList(result);
}
internal static List<U> eagerMapWithIndex<T, U>(Iterable<T> iterable, BiFunction<int, T, U> function) {
var result = FromJava.IterableToEnumerable(iterable)
.Select((value, index) => function.apply(index, value))
.ToList();
return ToJava.ListToList(result);
}
internal static List<U> eagerFlatMap<T, U>(Iterable<T> iterable, Function<T, Iterable<U>> function) {
var result = FromJava.IterableToEnumerable(iterable)
.SelectMany(element => FromJava.IterableToEnumerable(function.apply(element)))
.ToList();
return ToJava.ListToList(result);
}
internal static List<T> cons<T>(T head, Iterable<T> tail) {
var result = new T[] { head }
.Concat(FromJava.IterableToEnumerable(tail))
.ToList();
return ToJava.ListToList(result);
}
internal static List<T> eagerConcat<T>(Iterable<T> first, Iterable<T> second) {
var result = FromJava.IterableToEnumerable(first)
.Concat(FromJava.IterableToEnumerable(second))
.ToList();
return ToJava.ListToList(result);
}
internal static List<T> eagerConcat<T>(Iterable<T> first, Iterable<T> second, Iterable<T> third) {
var result = FromJava.IterableToEnumerable(first)
.Concat(FromJava.IterableToEnumerable(second))
.Concat(FromJava.IterableToEnumerable(third))
.ToList();
return ToJava.ListToList(result);
}
internal static List<T> orderedBy<T, R>(Iterable<T> iterable, Function<T, R> getKey) {
var result = FromJava.IterableToEnumerable(iterable)
.OrderBy(getKey.apply)
.ToList();
return ToJava.ListToList(result);
}
internal static Optional<T> tryGetLast<T>(List<T> list) {
if (list.isEmpty()) {
return None<T>.Instance;
} else {
return new Some<T>(list.get(list.size() - 1));
}
}
internal static Iterable<T> reversed<T>(List<T> list) {
return new ReversedList<T>(list);
}
private class ReversedList<T> : Iterable<T> {
private readonly List<T> _list;
internal ReversedList(List<T> list) {
_list = list;
}
public Iterator<T> iterator() {
return new ReverseIterator<T>(_list);
}
}
private class ReverseIterator<T> : Iterator<T> {
private readonly List<T> _list;
private int _nextIndex;
internal ReverseIterator(List<T> list) {
_list = list;
_nextIndex = _list.size() - 1;
}
public bool hasNext() {
return _nextIndex >= 0;
}
public T next() {
if (hasNext()) {
return _list.get(_nextIndex--);
} else {
throw new NoSuchElementException();
}
}
}
}
}
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