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/*-
 * -\-\-
 * DBeam Core
 * --
 * Copyright (C) 2016 - 2018 Spotify AB
 * --
 * Licensed 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 com.spotify.dbeam.args;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import java.util.Map;

public class JdbcConnectionUtil {

  private static Map driverMapping =
      ImmutableMap.of(
          "postgresql", "org.postgresql.Driver",
          "mysql", "com.mysql.cj.jdbc.Driver",
          "h2", "org.h2.Driver");

  public static String getDriverClass(final String url) throws ClassNotFoundException {
    final String[] parts = url.split(":", 3);
    Preconditions.checkArgument(
        parts.length > 1 && "jdbc".equals(parts[0]) && driverMapping.get(parts[1]) != null,
        "Invalid jdbc connection URL: %s. Expect jdbc:postgresql or jdbc:mysql as prefix.",
        url);
    return Class.forName(driverMapping.get(parts[1])).getCanonicalName();
  }
}