/*
 * Copyright 2022 LINE Corporation
 *
 * LINE Corporation licenses this file to you 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 com.linecorp.armeria.internal.common.util;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

import java.util.List;

public final class CollectionUtil {

    /**
     * Returns a truncated list of at most {@code maxSize}.
     */
    public static <T> List<T> truncate(List<T> list, int maxSize) {
        requireNonNull(list, "list");
        checkArgument(maxSize >= 0, "maxSize: %s (expected: >= 0)", maxSize);

        if (list.size() <= maxSize) {
            return list;
        }
        return list.subList(0, maxSize);
    }

    private CollectionUtil() {}
}
