1 /**
2 * This file Copyright (c) 2012-2014 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.vaadin.integration.jcr;
35
36 import com.vaadin.data.util.ObjectProperty;
37 import com.vaadin.data.util.converter.Converter.ConversionException;
38
39 /**
40 * Basic implementation of {@link com.vaadin.data.Property}.
41 *
42 * @param <T> generic type of the value.
43 */
44 public class DefaultProperty<T> extends ObjectProperty<T> {
45
46 @SuppressWarnings("unchecked")
47 // the cast is safe, because an object of type T has class Class<T>
48 public DefaultProperty(T value) {
49 this((value != null?(Class<T>) value.getClass():null), value);
50 }
51
52 /**
53 * Creates a typed DefaultProperty based on the properties name, it's type value and the actual class type.
54 * Value can be null.
55 */
56 public DefaultProperty(Class<T> type, T value) {
57 super(value, type);
58 }
59
60 @Override
61 public void setValue(T newValue) throws ReadOnlyException, ConversionException {
62 if (isReadOnly()) {
63 throw new ReadOnlyException("Property is readonly: Can not update value: " + String.valueOf(newValue));
64 }
65 if (newValue != null && !getType().isAssignableFrom(newValue.getClass())) {
66 throw new ConversionException("Cannot convert " + newValue.getClass() + " to " + getType());
67 }
68 super.setValue(newValue);
69 }
70
71 @Override
72 public String toString() {
73 T value = getValue();
74 return value != null ? value.toString() : "";
75 }
76 }