/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.kylin.query.util;

import java.util.List;

import org.apache.commons.lang.StringUtils;

import com.google.common.collect.Lists;

public class QueryInfoCollector {
    private List<String> cubeNames;

    private static final ThreadLocal<QueryInfoCollector> queryInfoThreadLocal = ThreadLocal.withInitial(QueryInfoCollector::new);

    public static QueryInfoCollector current() {
        return queryInfoThreadLocal.get();
    }

    public static void reset() {
        queryInfoThreadLocal.remove();
    }

    private QueryInfoCollector() {
        this.cubeNames = Lists.newArrayList();
    }

    public List<String> getCubeNames() {
        return cubeNames;
    }

    public void setCubeNames(List<String> cubeNames) {
        this.cubeNames = cubeNames;
    }

    public String getCubeNameString() {
        return StringUtils.join(this.cubeNames, ",");
    }
}
