/*
 * Copyright OpenSearch Contributors
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

package org.opensearch.sdk.ssl.util;

/**
 * Convenience class that contains utility methods used for SSL
 */
public class Utils {

    /**
     *
     * @param first First nullable arg
     * @param more list of potentially nullable args
     * @return The first non-null arg
     * @param <T> The type of arg
     */
    public static <T> T coalesce(T first, T... more) {
        if (first != null) {
            return first;
        }

        if (more == null || more.length == 0) {
            return null;
        }

        for (int i = 0; i < more.length; i++) {
            T t = more[i];
            if (t != null) {
                return t;
            }
        }

        return null;
    }

    /**
     *
     * @param str String to convert
     * @return char[] representation of the input str
     */
    public static char[] toCharArray(String str) {
        return (str == null || str.length() == 0) ? null : str.toCharArray();
    }
}