1 /**
2 * This file Copyright (c) 2016-2017 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.converter;
35
36 import java.math.BigDecimal;
37 import java.text.NumberFormat;
38 import java.util.Locale;
39
40 import com.vaadin.data.util.converter.Converter;
41 import com.vaadin.data.util.converter.DefaultConverterFactory;
42 import com.vaadin.data.util.converter.StringToBigDecimalConverter;
43 import com.vaadin.data.util.converter.StringToDoubleConverter;
44 import com.vaadin.data.util.converter.StringToFloatConverter;
45
46 /**
47 * Disable rounding for Vaadin's default string-to-floating-point converters.
48 */
49 public class NonRoundingConverterFactory extends DefaultConverterFactory {
50 @Override
51 protected Converter<String, ?> createStringConverter(Class<?> sourceType) {
52
53 if (Double.class.isAssignableFrom(sourceType)) {
54 return new StringToDoubleConverter() {
55 @Override
56 protected NumberFormat getFormat(Locale locale) {
57 return amendMaximumFractionDigits(super.getFormat(locale));
58 }
59 };
60
61 } else if (Float.class.isAssignableFrom(sourceType)) {
62 return new StringToFloatConverter() {
63 @Override
64 protected NumberFormat getFormat(Locale locale) {
65 return amendMaximumFractionDigits(super.getFormat(locale));
66 }
67 };
68
69 } else if (BigDecimal.class.isAssignableFrom(sourceType)) {
70 return new StringToBigDecimalConverter() {
71 @Override
72 protected NumberFormat getFormat(Locale locale) {
73 return amendMaximumFractionDigits(super.getFormat(locale));
74 }
75 };
76 }
77
78 return super.createStringConverter(sourceType);
79 }
80
81 private NumberFormat amendMaximumFractionDigits(NumberFormat format) {
82 // default NumberFormat instances have maximumFractionDigits = 3
83 format.setMaximumFractionDigits(Integer.MAX_VALUE);
84 return format;
85 }
86 }