/*
 * Tencent is pleased to support the open source community by making BK-BASE 蓝鲸基础平台 available.
 *
 * Copyright (C) 2021 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-BASE 蓝鲸基础平台 is licensed under the MIT License.
 *
 * License for BK-BASE 蓝鲸基础平台:
 * --------------------------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.tencent.bk.base.datalab.queryengine.validator.optimizer;

import com.beust.jcommander.internal.Lists;
import com.google.common.collect.ImmutableList;
import com.tencent.bk.base.datalab.bksql.validator.SimpleListenerWalker;
import java.util.List;
import org.apache.calcite.sql.SqlIdentifier;
import org.apache.commons.lang.StringUtils;

public class DruidIdentifierOptimizer extends SimpleListenerWalker {

    @Override
    public void enterIdentifierNode(SqlIdentifier identifier) {
        super.enterIdentifierNode(identifier);
        quoteIdentifier(identifier);
    }

    private void quoteIdentifier(SqlIdentifier column) {
        ImmutableList<String> names = column.names;
        List<String> newNames = Lists.newArrayList(names.size());
        for (int i = 0; i < names.size(); i++) {
            final String name = names.get(i);
            if (StringUtils.isNotBlank(name)) {
                newNames.add(i, "\"" + name + "\"");
            } else if ("".equals(name)) {
                newNames.add(i, name);
            }
        }
        column.setNames(newNames, Lists.newArrayList(column.getParserPosition()));
    }
}