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 */
016package com.mybatisflex.core.query;
017
018import com.mybatisflex.core.dialect.IDialect;
019import com.mybatisflex.core.util.StringUtil;
020
021/**
022 * 查询的 table，
023 * 实例1：用于构建 select * from (select ...) 中的第二个 select
024 * 实例2：用于构建 left join (select ...) 中的 select
025 */
026public class SelectQueryTable extends QueryTable {
027
028    private QueryWrapper queryWrapper;
029
030    public SelectQueryTable(QueryWrapper queryWrapper) {
031        super();
032        this.queryWrapper = queryWrapper;
033    }
034
035    public QueryWrapper getQueryWrapper() {
036        return queryWrapper;
037    }
038
039    public void setQueryWrapper(QueryWrapper queryWrapper) {
040        this.queryWrapper = queryWrapper;
041    }
042
043    @Override
044    public String toSql(IDialect dialect) {
045        String sql = dialect.buildSelectSql(queryWrapper);
046        if (StringUtil.isNotBlank(alias)) {
047            return "(" + sql + ") AS " + dialect.wrap(alias);
048        } else {
049            return sql;
050        }
051    }
052}