nl.altindag.ssl.util.CollectorsUtils Maven / Gradle / Ivy

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/*
 * Copyright 2019 Thunderberry.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package nl.altindag.ssl.util;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Collectors;

/**
 * NOTE:
 * Please don't use this class directly as it is part of the internal API. Class name and methods can be changed any time.
 *
 * @author Hakan Altindag
 */
public final class CollectorsUtils {

    private CollectorsUtils() {
    }

    public static  Collector> toUnmodifiableList() {
        return Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList);
    }

    public static  Collector> toModifiableList() {
        return Collectors.toCollection(ArrayList::new);
    }

    public static  Collector toListAndThen(Function,U> finisher) {
        return Collectors.collectingAndThen(Collectors.toList(), finisher);
    }

}