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.core.logicdelete.impl;
018
019import com.mybatisflex.core.dialect.IDialect;
020import com.mybatisflex.core.logicdelete.AbstractLogicDeleteProcessor;
021import com.mybatisflex.core.query.QueryColumn;
022import com.mybatisflex.core.query.QueryWrapper;
023import com.mybatisflex.core.table.TableInfo;
024
025/**
026 * {@link java.time.LocalDateTime} 类型的属性对应的逻辑删除处理器。
027 *
028 * @author 王帅
029 * @since 2023-06-20
030 */
031public class DateTimeLogicDeleteProcessor extends AbstractLogicDeleteProcessor {
032
033    @Override
034    public String buildLogicNormalCondition(String logicColumn, TableInfo tableInfo, IDialect dialect) {
035        return dialect.wrap(logicColumn) + " IS NULL";
036    }
037
038    @Override
039    public void buildQueryCondition(QueryWrapper queryWrapper, TableInfo tableInfo) {
040        QueryColumn queryColumn = new QueryColumn(tableInfo.getSchema(), tableInfo.getTableName(), tableInfo.getLogicDeleteColumn());
041        queryWrapper.and(queryColumn.isNull());
042    }
043
044    /**
045     * 逻辑删除字段值为 {@code null} 表示数据未删除。
046     */
047    @Override
048    protected Object getLogicNormalValue() {
049        return null;
050    }
051
052    /**
053     * 逻辑删除字段值为 {@code NOW()} 表示数据删除，并记录删除时间。
054     */
055    @Override
056    protected Object getLogicDeletedValue() {
057        return "NOW()";
058    }
059
060}