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 javax.enterprise.context.ApplicationScoped;
020
021import org.microbean.settings.Converter;
022import org.microbean.settings.Value;
023
024@ApplicationScoped
025public class DoubleConverter implements Converter<Double> {
026
027  private static final long serialVersionUID = 1L;
028
029  public DoubleConverter() {
030    super();
031  }
032
033  @Override
034  public Double convert(final Value value) {
035    final Double returnValue;
036    if (value == null) {
037      returnValue = null;
038    } else {
039      final String stringValue = value.get();
040      if (stringValue == null) {
041        returnValue = null;
042      } else {
043        returnValue = Double.valueOf(stringValue);
044      }
045    }
046    return returnValue;
047  }
048
049}