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 org.microbean.settings.Converter;
020import org.microbean.settings.Value;
021
022public final class LongConverter implements Converter<Long> {
023
024  private static final long serialVersionUID = 1L;
025
026  public LongConverter() {
027    super();
028  }
029
030  @Override
031  public final Long convert(final Value value) {
032    final Long returnValue;
033    if (value == null) {
034      returnValue = null;
035    } else {
036      final String stringValue = value.get();
037      if (stringValue == null) {
038        returnValue = null;
039      } else {
040        returnValue = Long.decode(stringValue);
041      }
042    }
043    return returnValue;
044  }
045
046}