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
021import java.util.List;
022
023/**
024 * 括号
025 */
026public class Brackets extends QueryCondition {
027
028    private QueryCondition childCondition;
029
030
031    public Brackets(QueryCondition childCondition) {
032        this.childCondition = childCondition;
033    }
034
035
036    @Override
037    public QueryCondition and(QueryCondition nextCondition) {
038        connectToChild(nextCondition, SqlConnector.AND);
039        return this;
040    }
041
042    @Override
043    public QueryCondition or(QueryCondition nextCondition) {
044        connectToChild(nextCondition, SqlConnector.OR);
045        return this;
046    }
047
048    protected void connectToChild(QueryCondition nextCondition, SqlConnector connector) {
049        childCondition.connect(nextCondition, connector);
050    }
051
052    @Override
053    public Object getValue() {
054        return checkEffective() ? WrapperUtil.getValues(childCondition) : null;
055    }
056
057    @Override
058    public String toSql(List<QueryTable> queryTables, IDialect dialect) {
059        StringBuilder sql = new StringBuilder();
060        if (checkEffective()) {
061            String childSql = childCondition.toSql(queryTables, dialect);
062            if (StringUtil.isNotBlank(childSql)) {
063                QueryCondition effectiveBefore = getEffectiveBefore();
064                if (effectiveBefore != null) {
065                    childSql = effectiveBefore.connector + "(" + childSql + ")";
066                }
067                sql.append(childSql);
068            } else {
069                //all child conditions is not effective
070                //fixed gitee #I6W89G
071                this.effective = false;
072            }
073        }
074
075        if (this.next != null) {
076            return sql + next.toSql(queryTables, dialect);
077        }
078
079        return sql.toString();
080    }
081
082
083    @Override
084    public String toString() {
085        return "Brackets{" +
086                "childCondition=" + childCondition +
087                '}';
088    }
089}