lodsve.core.utils.EnumUtils Maven / Gradle / Ivy

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/*
 * Copyright (C) 2018  Sun.Hao
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package lodsve.core.utils;

import org.springframework.util.Assert;

/**
 * 枚举相关工具类.
 *
 * @author sunhao([email protected])
 * @date 2018-11-26 22:55
 */
public class EnumUtils {
    /**
     * 根据枚举下标获取枚举值
     *
     * @param clazz   枚举类型
     * @param ordinal 下标
     * @return 枚举值
     */
    public static Enum getEnumByOrdinal(Class clazz, Integer ordinal) {
        Assert.notNull(clazz, "enum class not be null!");

        Enum[] enums = clazz.getEnumConstants();
        if (ordinal < 0 || ordinal >= enums.length) {
            throw new IndexOutOfBoundsException("Invalid ordinal");
        }

        return enums[ordinal];
    }

    /**
     * 根据枚举名称获取枚举值
     *
     * @param clazz 枚举类型
     * @param name  枚举值
     * @param    枚举类型
     * @return 枚举值
     */
    public static > T getEnumByName(Class clazz, String name) {
        return Enum.valueOf(clazz, name);
    }
}