1 /**
2 * This file Copyright (c) 2013 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.form.field.property;
35
36
37 import java.util.ArrayList;
38 import java.util.List;
39
40 import com.vaadin.data.util.ObjectProperty;
41
42 /**
43 * {@link ObjectProperty} implementation used in order to handle MultiProperty type.<br>
44 * This property is set as {@link com.vaadin.ui.Field#setPropertyDataSource(com.vaadin.data.Property)} and handle a list of generic objects.<br>
45 * {@link MultiValueHandler} perform the bridge (retrieve/store) between <br>
46 * - the stored values (multi value properties, multi nodes,...) <br>
47 * and<br>
48 * - the list element.
49 *
50 * @param <T>
51 */
52 public class MultiProperty<T> extends ObjectProperty<List<T>> {
53
54 private MultiValueHandler<T> handler;
55
56 public MultiProperty(MultiValueHandler<T> delegate) {
57 super(new ArrayList<T>());
58 this.handler = delegate;
59 setValue(this.handler.getValue());
60 }
61
62 @Override
63 public void setValue(List<T> newValue) throws com.vaadin.data.Property.ReadOnlyException {
64 super.setValue(newValue);
65 if (handler != null) {
66 handler.setValue(newValue);
67 }
68 }
69
70 @Override
71 public List<T> getValue() {
72 return super.getValue();
73 }
74 }