/*
 * 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.iceberg.flink.formats.avro;

import org.joda.time.DateTime;
import org.joda.time.DateTimeFieldType;
import org.joda.time.LocalDate;
import org.joda.time.LocalTime;

/**
 * Encapsulates joda optional dependency. Instantiates this class only if joda is available on the
 * classpath.
 */
@SuppressWarnings("JavaUtilDate")
class JodaConverter {

  private static JodaConverter instance;
  private static boolean instantiated = false;

  public static JodaConverter getConverter() {
    if (instantiated) {
      return instance;
    }

    try {
      Class.forName(
          "org.joda.time.DateTime", false, Thread.currentThread().getContextClassLoader());
      instance = new JodaConverter();
    } catch (ClassNotFoundException e) {
      instance = null;
    } finally {
      instantiated = true;
    }
    return instance;
  }

  public long convertDate(Object object) {
    final LocalDate value = (LocalDate) object;
    return value.toDate().getTime();
  }

  public int convertTime(Object object) {
    final LocalTime value = (LocalTime) object;
    return value.get(DateTimeFieldType.millisOfDay());
  }

  public long convertTimestamp(Object object) {
    final DateTime value = (DateTime) object;
    return value.toDate().getTime();
  }

  private JodaConverter() {}
}
