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.net.MalformedURLException;
020import java.net.URI;
021import java.net.URL;
022import java.net.URISyntaxException;
023
024import javax.enterprise.context.ApplicationScoped;
025
026import org.microbean.settings.Converter;
027import org.microbean.settings.Value;
028
029@ApplicationScoped
030public class URLConverter implements Converter<URL> {
031
032  private static final long serialVersionUID = 1L;
033
034  public URLConverter() {
035    super();
036  }
037
038  @Override
039  public URL convert(final Value value) {
040    final URL returnValue;
041    if (value == null) {
042      returnValue = null;
043    } else {
044      final String stringValue = value.get();
045      if (stringValue == null) {
046        returnValue = null;
047      } else {
048        URL result = null;
049        try {
050          result = new URI(stringValue).toURL();
051        } catch (final MalformedURLException | URISyntaxException exception) {
052          throw new IllegalArgumentException(stringValue, exception);
053        } finally {
054          returnValue = result;
055        }
056      }
057    }
058    return returnValue;
059  }
060
061}