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/*
* This file is part of fabric-loom, licensed under the MIT License (MIT).
*
* Copyright (c) 2020-2021 FabricMC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.fabricmc.loom.util.function;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.function.Function;
import java.util.function.Predicate;
/**
* Stream-like utilities for working with collections.
*
* @author Juuz
*/
public final class CollectionUtil {
/**
* Finds the first element matching the predicate.
*
* @param collection the collection to be searched
* @param filter the predicate to be matched
* @param <E> the element type
* @return the first matching element, or empty if none match
*/
public static <E> Optional<E> find(Iterable<? extends E> collection, Predicate<? super E> filter) {
for (E e : collection) {
if (filter.test(e)) {
return Optional.of(e);
}
}
return Optional.empty();
}
/**
* Transforms the collection with a function.
*
* @param collection the source collection
* @param transform the transformation function
* @param <A> the source type
* @param <B> the target type
* @return a mutable list with the transformed entries
*/
public static <A, B> List<B> map(Iterable<? extends A> collection, Function<? super A, ? extends B> transform) {
ArrayList<B> result = new ArrayList<>();
for (A a : collection) {
result.add(transform.apply(a));
}
return result;
}
}
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