/*
 * 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.cassandra.analytics;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A class that provides {@link SparkTestUtils}
 */
public final class SparkTestUtilsProvider
{
    private static final Logger LOGGER = LoggerFactory.getLogger(SparkTestUtilsProvider.class);

    private SparkTestUtilsProvider()
    {
        throw new IllegalStateException(getClass() + " is static utility class and shall not be instantiated");
    }

    public static SparkTestUtils utils()
    {
        String className = System.getProperty("cassandra.analytics.spark.test_utils");

        if (className != null)
        {
            try
            {
                LOGGER.info("Instantiating SparkTestUtils with class name {}", className);
                return (SparkTestUtils) Class.forName(className).getDeclaredConstructor().newInstance();
            }
            catch (Exception e)
            {
                LOGGER.warn("Unable to initialize class {}", className, e);
            }
        }

        return new SparkTestUtils();
    }
}
