001/*
002 *  Copyright (c) 2022-2025, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.mybatisflex.core.keygen;
017
018import com.mybatisflex.core.exception.FlexExceptions;
019import com.mybatisflex.core.exception.locale.LocalizedFormats;
020import com.mybatisflex.core.keygen.impl.FlexIDKeyGenerator;
021import com.mybatisflex.core.keygen.impl.SnowFlakeIDKeyGenerator;
022import com.mybatisflex.core.keygen.impl.ULIDKeyGenerator;
023import com.mybatisflex.core.keygen.impl.UUIDKeyGenerator;
024import com.mybatisflex.core.util.StringUtil;
025
026import java.util.HashMap;
027import java.util.Map;
028
029public class KeyGeneratorFactory {
030
031    private KeyGeneratorFactory() {
032    }
033
034    private static final Map<String, IKeyGenerator> KEY_GENERATOR_MAP = new HashMap<>();
035
036    static {
037        /** 内置了 uuid 的生成器，因此主键配置的时候可以直接配置为 @Id(keyType = KeyType.Generator, value = "uuid")
038         * {@link com.mybatisflex.annotation.Id}
039         */
040        register(KeyGenerators.uuid, new UUIDKeyGenerator());
041        register(KeyGenerators.flexId, new FlexIDKeyGenerator());
042        register(KeyGenerators.snowFlakeId, new SnowFlakeIDKeyGenerator());
043        register(KeyGenerators.ulid, new ULIDKeyGenerator());
044
045    }
046
047
048    /**
049     * 获取 主键生成器
050     *
051     * @param name
052     * @return 主键生成器
053     */
054    public static IKeyGenerator getKeyGenerator(String name) {
055        if (StringUtil.isBlank(name)) {
056            throw FlexExceptions.wrap(LocalizedFormats.KEY_GENERATOR_BLANK);
057        }
058        return KEY_GENERATOR_MAP.get(name.trim());
059    }
060
061
062    /**
063     * 注册一个主键生成器
064     *
065     * @param key
066     * @param keyGenerator
067     */
068    public static void register(String key, IKeyGenerator keyGenerator) {
069        KEY_GENERATOR_MAP.put(key.trim(), keyGenerator);
070    }
071
072}