/*
 * 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.hudi.sink.bulk;

import org.apache.hudi.configuration.FlinkOptions;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.table.types.logical.RowType;

import java.util.List;

/**
 * Factory class for all kinds of {@link RowDataKeyGen}.
 */
public class RowDataKeyGens {

  /**
   * Creates a {@link RowDataKeyGen} with given configuration.
   */
  public static RowDataKeyGen instance(Configuration conf, RowType rowType, int taskId, String instantTime) {
    String recordKeys = conf.getString(FlinkOptions.RECORD_KEY_FIELD);
    if (hasRecordKey(recordKeys, rowType.getFieldNames())) {
      return RowDataKeyGen.instance(conf, rowType);
    } else {
      return AutoRowDataKeyGen.instance(conf, rowType, taskId, instantTime);
    }
  }

  /**
   * Checks whether user provides any record key.
   */
  private static boolean hasRecordKey(String recordKeys, List<String> fieldNames) {
    return recordKeys.split(",").length != 1
        || fieldNames.contains(recordKeys);
  }
}
