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Bus Crypto
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/*********************************************************************************
 *                                                                               *
 * The MIT License (MIT)                                                         *
 *                                                                               *
 * Copyright (c) 2015-2020 aoju.org and other contributors.                      *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy  *
 * of this software and associated documentation files (the "Software"), to deal *
 * in the Software without restriction, including without limitation the rights  *
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     *
 * copies of the Software, and to permit persons to whom the Software is         *
 * furnished to do so, subject to the following conditions:                      *
 *                                                                               *
 * The above copyright notice and this permission notice shall be included in    *
 * all copies or substantial portions of the Software.                           *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    *
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   *
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 * THE SOFTWARE.                                                                 *
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package org.aoju.bus.crypto;

import org.aoju.bus.core.lang.Algorithm;
import org.aoju.bus.core.lang.exception.InstrumentException;
import org.aoju.bus.core.toolkit.ObjectKit;
import org.aoju.bus.crypto.provider.*;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * 系统中内置的策略映射
 * 注解和实现之间映射
 *
 * @author Kimi Liu
 * @version 6.1.1
 * @since JDK 1.8+
 */
public final class Registry {

    /**
     * 组件信息
     */
    private static Map ALGORITHM_CACHE = new ConcurrentHashMap<>();

    static {
        register(Algorithm.AES, new AESProvider());
        register(Algorithm.DES, new DESProvider());
        register(Algorithm.RC4, new RC4Provider());
        register(Algorithm.RSA, new RSAProvider());
        register(Algorithm.SM2, new SM2Provider());
        register(Algorithm.SM4, new SM4Provider());
    }

    /**
     * 注册组件
     *
     * @param name   组件名称
     * @param object 组件对象
     */
    public static void register(String name, Provider object) {
        if (ALGORITHM_CACHE.containsKey(name)) {
            throw new InstrumentException("重复注册同名称的组件：" + name);
        }
        Class clazz = object.getClass();
        if (ALGORITHM_CACHE.containsKey(clazz.getSimpleName())) {
            throw new InstrumentException("重复注册同类型的组件：" + clazz);
        }
        ALGORITHM_CACHE.putIfAbsent(name, object);
    }

    /**
     * 生成脱敏工具
     *
     * @param name 模型
     * @return the object
     */
    public static Provider require(String name) {
        Provider object = ALGORITHM_CACHE.get(name);
        if (ObjectKit.isEmpty(object)) {
            throw new IllegalArgumentException("none provider be found!, type:" + name);
        }
        return object;
    }

    /**
     * 是否包含指定名称算法
     *
     * @param name 组件名称
     * @return true：包含, false：不包含
     */
    public boolean contains(String name) {
        return ALGORITHM_CACHE.containsKey(name);
    }

}