001/* -*- mode: Java; c-basic-offset: 2; indent-tabs-mode: nil; coding: utf-8-unix -*-
002 *
003 * Copyright © 2020 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.settings.converter;
018
019import java.time.Instant;
020
021import java.util.Calendar;
022import java.util.Date;
023
024import javax.enterprise.context.ApplicationScoped;
025
026import org.microbean.settings.Converter;
027import org.microbean.settings.Value;
028
029@ApplicationScoped
030public class CalendarConverter implements Converter<Calendar> {
031
032  private static final long serialVersionUID = 1L;
033
034  private final DateConverter delegate;
035  
036  public CalendarConverter() {
037    super();
038    this.delegate = new DateConverter();
039  }
040
041  @Override
042  public Calendar convert(final Value value) {
043    final Calendar returnValue;
044    if (value == null) {
045      returnValue = null;
046    } else {
047      final String stringValue = value.get();
048      if (stringValue == null) {
049        returnValue = null;
050      } else {
051        final Date date = this.delegate.convert(value);
052        assert date != null;
053        returnValue = Calendar.getInstance();
054        assert returnValue != null;
055        returnValue.setTime(date);
056      }
057    }
058    return returnValue;
059  }
060
061}