001/* -*- mode: Java; c-basic-offset: 2; indent-tabs-mode: nil; coding: utf-8-unix -*-
002 *
003 * Copyright © 2017 MicroBean.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
014 * implied.  See the License for the specific language governing
015 * permissions and limitations under the License.
016 */
017package org.microbean.configuration.spi.converter;
018
019import java.time.Instant;
020
021import java.util.Calendar;
022
023import org.microbean.configuration.spi.Converter;
024
025public final class StringToCalendarConverter extends Converter<Calendar> {
026
027  private static final long serialVersionUID = 1L;
028
029  private static final StringToInstantConverter stringToInstantConverter = new StringToInstantConverter();
030
031  @Override
032  public final Calendar convert(final String value) {
033    final Instant instant = stringToInstantConverter.convert(value);
034    final Calendar returnValue;
035    if (instant == null) {
036      returnValue = null;
037    } else {
038      returnValue = Calendar.getInstance();
039      assert returnValue != null;
040      returnValue.setTimeInMillis(instant.toEpochMilli());
041    }
042    return returnValue;
043  }
044  
045}