1 /**
2 * This file Copyright (c) 2018 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.ui.datasource.optionlist;
35
36 import java.util.Optional;
37
38 import com.vaadin.data.Converter;
39 import com.vaadin.data.Result;
40 import com.vaadin.data.ValueContext;
41
42 /**
43 * Converts a {@link Option} to its String representation and vice versa.
44 */
45 public class OptionLinkConverter implements Converter<Option, String> {
46
47 private OptionListDefinition definition;
48
49 public OptionLinkConverter(OptionListDefinition definition) {
50 this.definition = definition;
51 }
52
53 @Override
54 public Result<String> convertToModel(Option value, ValueContext context) {
55 if (value == null) {
56 return Result.ok(null);
57 }
58 return Result.ok(value.getValue());
59 }
60
61 @Override
62 public Option convertToPresentation(String value, ValueContext context) {
63 if (value == null) {
64 return new Option();
65 }
66 final Optional<Option> optionalDef = definition.getOptions()
67 .stream()
68 .filter(option -> value.equals(option.getValue()))
69 .findFirst();
70 return optionalDef.orElse(new Option());
71 }
72 }