001/*
002 *  Copyright (c) 2022-2023, 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 */
016
017package com.mybatisflex.annotation;
018
019/**
020 * 类型支持 update 监听器。
021 *
022 * @author snow
023 * @since 2023/4/28
024 */
025public abstract class AbstractUpdateListener<T> implements UpdateListener {
026
027    /**
028     * 该监听器支持的 entity 类型。
029     *
030     * @return type
031     */
032    public abstract Class<T> supportType();
033
034    /**
035     * 更新操作的前置操作。
036     *
037     * @param entity 实体类
038     */
039    public abstract void doUpdate(T entity);
040
041    @Override
042    @SuppressWarnings("unchecked")
043    public void onUpdate(Object entity) {
044        Class<T> supportType = supportType();
045        if (supportType.isInstance(entity)) {
046            T object = (T) entity;
047            doUpdate(object);
048        }
049    }
050
051}