    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.imaging.internal;
    018
    019import java.util.Arrays;
    020
    021/**
    022 * Provides safe arithmetic operations to avoid, for example, numeric overflows.
    023 *
    024 * @since 1.0.0-alpha4
    025 */
    026public final class SafeOperations {
    027
    028    /**
    029     * Applies {@link Math#addExact(int, int)} to a variable length array of integers.
    030     *
    031     * @param values variable length array of integers.
    032     * @return the values safely added.
    033     */
    034    public static int add(final int... values) {
    035        if (values == null || values.length < 2) {
    036            throw new IllegalArgumentException("You must provide at least two elements to be added");
    037        }
    038        return Arrays.stream(values).reduce(0, Math::addExact);
    039    }
    040
    041    private SafeOperations() {
    042    }
    043
    044}